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|
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<head><title>Package Manager Specification</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
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<div class="maketitle">
<h2 class="titleHead">Package Manager Specification</h2>
<div class="author" ><span
class="ecrm-1200">Stephen P. Bennett</span>
<br /><a
href="mailto:spb@exherbo.org" ><span
class="ecrm-1200">spb@exherbo.org</span></a> <br class="and" /><span
class="ecrm-1200">Ciaran McCreesh</span>
<br /> <a
href="mailto:ciaran.mccreesh@googlemail.com" ><span
class="ecrm-1200">ciaran.mccreesh@googlemail.com</span></a></div>
<br />
<div class="date" ><span
class="ecrm-1200">18th</span><span
class="ecrm-1200"> January</span><span
class="ecrm-1200"> 2010</span></div>
</div>
<h2 class="likechapterHead"><a
id="x1-1000"></a>Contents</h2> <div class="tableofcontents">
<span class="chapterToc" >1 <a
href="#x1-80001" id="QQ2-1-8">Introduction</a></span>
<br /> <span class="sectionToc" >1.1 <a
href="#x1-90001.1" id="QQ2-1-9">Aims and Motivation</a></span>
<br /> <span class="sectionToc" >1.2 <a
href="#x1-100001.2" id="QQ2-1-10">Rationale</a></span>
<br /> <span class="sectionToc" >1.3 <a
href="#x1-110001.3" id="QQ2-1-11">Conventions</a></span>
<br /><span class="chapterToc" >2 <a
href="#x1-120002" id="QQ2-1-12">EAPIs</a></span>
<br /> <span class="sectionToc" >2.1 <a
href="#x1-130002.1" id="QQ2-1-13">Definition</a></span>
<br /> <span class="sectionToc" >2.2 <a
href="#x1-140002.2" id="QQ2-1-14">Defined EAPIs</a></span>
<br /> <span class="sectionToc" >2.3 <a
href="#x1-150002.3" id="QQ2-1-15">Reserved EAPIs</a></span>
<br /><span class="chapterToc" >3 <a
href="#x1-160003" id="QQ2-1-16">Names and Versions</a></span>
<br /> <span class="sectionToc" >3.1 <a
href="#x1-170003.1" id="QQ2-1-17">Restrictions upon Names</a></span>
<br />  <span class="subsectionToc" >3.1.1 <a
href="#x1-180003.1.1" id="QQ2-1-18">Category Names</a></span>
<br />  <span class="subsectionToc" >3.1.2 <a
href="#x1-200003.1.2" id="QQ2-1-20">Package Names</a></span>
<br />  <span class="subsectionToc" >3.1.3 <a
href="#x1-220003.1.3" id="QQ2-1-22">Slot Names</a></span>
<br />  <span class="subsectionToc" >3.1.4 <a
href="#x1-230003.1.4" id="QQ2-1-23">USE Flag Names</a></span>
<br />  <span class="subsectionToc" >3.1.5 <a
href="#x1-250003.1.5" id="QQ2-1-25">Repository Names</a></span>
<br />  <span class="subsectionToc" >3.1.6 <a
href="#x1-260003.1.6" id="QQ2-1-26">Keyword Names</a></span>
<br /> <span class="sectionToc" >3.2 <a
href="#x1-270003.2" id="QQ2-1-27">Version Specifications</a></span>
<br /> <span class="sectionToc" >3.3 <a
href="#x1-280003.3" id="QQ2-1-28">Version Comparison</a></span>
<br /> <span class="sectionToc" >3.4 <a
href="#x1-290003.4" id="QQ2-1-36">Uniqueness of versions</a></span>
<br /><span class="chapterToc" >4 <a
href="#x1-300004" id="QQ2-1-37">Tree Layout</a></span>
<br /> <span class="sectionToc" >4.1 <a
href="#x1-310004.1" id="QQ2-1-38">Top Level</a></span>
<br /> <span class="sectionToc" >4.2 <a
href="#x1-320004.2" id="QQ2-1-39">Category Directories</a></span>
<br /> <span class="sectionToc" >4.3 <a
href="#x1-330004.3" id="QQ2-1-40">Package Directories</a></span>
<br /> <span class="sectionToc" >4.4 <a
href="#x1-340004.4" id="QQ2-1-41">The Profiles Directory</a></span>
<br />  <span class="subsectionToc" >4.4.1 <a
href="#x1-350004.4.1" id="QQ2-1-42">The profiles.desc file</a></span>
<br />  <span class="subsectionToc" >4.4.2 <a
href="#x1-360004.4.2" id="QQ2-1-43">The thirdpartymirrors file</a></span>
<br />  <span class="subsectionToc" >4.4.3 <a
href="#x1-370004.4.3" id="QQ2-1-44">use.desc and related files</a></span>
<br />  <span class="subsectionToc" >4.4.4 <a
href="#x1-380004.4.4" id="QQ2-1-45">The updates directory</a></span>
<br /> <span class="sectionToc" >4.5 <a
href="#x1-390004.5" id="QQ2-1-46">The Licenses Directory</a></span>
<br /> <span class="sectionToc" >4.6 <a
href="#x1-400004.6" id="QQ2-1-47">The Eclass Directory</a></span>
<br /> <span class="sectionToc" >4.7 <a
href="#x1-410004.7" id="QQ2-1-48">The Metadata Directory</a></span>
<br />  <span class="subsectionToc" >4.7.1 <a
href="#x1-420004.7.1" id="QQ2-1-49">The metadata cache</a></span>
<br /><span class="chapterToc" >5 <a
href="#x1-430005" id="QQ2-1-50">Profiles</a></span>
<br /> <span class="sectionToc" >5.1 <a
href="#x1-440005.1" id="QQ2-1-51">General principles</a></span>
<br /> <span class="sectionToc" >5.2 <a
href="#x1-450005.2" id="QQ2-1-52">Files that make up a profile</a></span>
<br />  <span class="subsectionToc" >5.2.1 <a
href="#x1-460005.2.1" id="QQ2-1-53">The parent file</a></span>
<br />  <span class="subsectionToc" >5.2.2 <a
href="#x1-470005.2.2" id="QQ2-1-54">The eapi file</a></span>
<br />  <span class="subsectionToc" >5.2.3 <a
href="#x1-480005.2.3" id="QQ2-1-55">deprecated</a></span>
<br />  <span class="subsectionToc" >5.2.4 <a
href="#x1-490005.2.4" id="QQ2-1-56">make.defaults</a></span>
<br />  <span class="subsectionToc" >5.2.5 <a
href="#x1-500005.2.5" id="QQ2-1-57">virtuals</a></span>
<br />  <span class="subsectionToc" >5.2.6 <a
href="#x1-510005.2.6" id="QQ2-1-58">Simple line-based files</a></span>
<br />  <span class="subsectionToc" >5.2.7 <a
href="#x1-520005.2.7" id="QQ2-1-59">packages</a></span>
<br />  <span class="subsectionToc" >5.2.8 <a
href="#x1-530005.2.8" id="QQ2-1-60">packages.build</a></span>
<br />  <span class="subsectionToc" >5.2.9 <a
href="#x1-540005.2.9" id="QQ2-1-61">package.mask</a></span>
<br />  <span class="subsectionToc" >5.2.10 <a
href="#x1-560005.2.10" id="QQ2-1-63">package.provided</a></span>
<br />  <span class="subsectionToc" >5.2.11 <a
href="#x1-570005.2.11" id="QQ2-1-64">package.use</a></span>
<br />  <span class="subsectionToc" >5.2.12 <a
href="#x1-580005.2.12" id="QQ2-1-65">USE masking and forcing</a></span>
<br /> <span class="sectionToc" >5.3 <a
href="#x1-590005.3" id="QQ2-1-67">Profile variables</a></span>
<br />  <span class="subsectionToc" >5.3.1 <a
href="#x1-600005.3.1" id="QQ2-1-68">Incremental Variables</a></span>
<br />  <span class="subsectionToc" >5.3.2 <a
href="#x1-610005.3.2" id="QQ2-1-70">Specific variables and their meanings</a></span>
<br /><span class="chapterToc" >6 <a
href="#x1-620006" id="QQ2-1-71">Old-Style Virtual Packages</a></span>
<br /> <span class="sectionToc" >6.1 <a
href="#x1-640006.1" id="QQ2-1-73">Dependencies on virtual packages</a></span>
<br /><span class="chapterToc" >7 <a
href="#x1-650007" id="QQ2-1-74">Ebuild File Format</a></span>
<br /><span class="chapterToc" >8 <a
href="#x1-660008" id="QQ2-1-75">Ebuild-defined Variables</a></span>
<br /> <span class="sectionToc" >8.1 <a
href="#x1-680008.1" id="QQ2-1-77">Metadata invariance</a></span>
<br /> <span class="sectionToc" >8.2 <a
href="#x1-690008.2" id="QQ2-1-78">Mandatory Ebuild-defined Variables</a></span>
<br /> <span class="sectionToc" >8.3 <a
href="#x1-700008.3" id="QQ2-1-80">Optional Ebuild-defined Variables</a></span>
<br />  <span class="subsectionToc" >8.3.1 <a
href="#x1-710008.3.1" id="QQ2-1-82">EAPI</a></span>
<br />  <span class="subsectionToc" >8.3.2 <a
href="#x1-720008.3.2" id="QQ2-1-83"><span
class="ectt-1000">RDEPEND </span>value</a></span>
<br /> <span class="sectionToc" >8.4 <a
href="#x1-730008.4" id="QQ2-1-85">Magic Ebuild-defined Variables</a></span>
<br /><span class="chapterToc" >9 <a
href="#x1-760009" id="QQ2-1-89">Dependencies</a></span>
<br /> <span class="sectionToc" >9.1 <a
href="#x1-770009.1" id="QQ2-1-90">Dependency Classes</a></span>
<br /> <span class="sectionToc" >9.2 <a
href="#x1-780009.2" id="QQ2-1-91">Dependency Specification Format</a></span>
<br />  <span class="subsectionToc" >9.2.1 <a
href="#x1-790009.2.1" id="QQ2-1-93">All-of Dependency Specifications</a></span>
<br />  <span class="subsectionToc" >9.2.2 <a
href="#x1-800009.2.2" id="QQ2-1-94">Use-conditional Dependency Specifications</a></span>
<br />  <span class="subsectionToc" >9.2.3 <a
href="#x1-810009.2.3" id="QQ2-1-95">Any-of Dependency Specifications</a></span>
<br />  <span class="subsectionToc" >9.2.4 <a
href="#x1-820009.2.4" id="QQ2-1-96">Package Dependency Specifications</a></span>
<br />  <span class="subsectionToc" >9.2.5 <a
href="#x1-890009.2.5" id="QQ2-1-106">Restrict</a></span>
<br />  <span class="subsectionToc" >9.2.6 <a
href="#x1-900009.2.6" id="QQ2-1-107">Properties</a></span>
<br />  <span class="subsectionToc" >9.2.7 <a
href="#x1-910009.2.7" id="QQ2-1-108">SRC_URI</a></span>
<br /><span class="chapterToc" >10 <a
href="#x1-9200010" id="QQ2-1-109">Ebuild-defined Functions</a></span>
<br /> <span class="sectionToc" >10.1 <a
href="#x1-9300010.1" id="QQ2-1-110">List of Functions</a></span>
<br />  <span class="subsectionToc" >10.1.1 <a
href="#x1-9400010.1.1" id="QQ2-1-111">Initial Working Directories</a></span>
<br />  <span class="subsectionToc" >10.1.2 <a
href="#x1-9500010.1.2" id="QQ2-1-113">pkg_pretend</a></span>
<br />  <span class="subsectionToc" >10.1.3 <a
href="#x1-9600010.1.3" id="QQ2-1-115">pkg_setup</a></span>
<br />  <span class="subsectionToc" >10.1.4 <a
href="#x1-9700010.1.4" id="QQ2-1-116">src_unpack</a></span>
<br />  <span class="subsectionToc" >10.1.5 <a
href="#x1-9800010.1.5" id="QQ2-1-117">src_prepare</a></span>
<br />  <span class="subsectionToc" >10.1.6 <a
href="#x1-9900010.1.6" id="QQ2-1-119">src_configure</a></span>
<br />  <span class="subsectionToc" >10.1.7 <a
href="#x1-10000010.1.7" id="QQ2-1-121">src_compile</a></span>
<br />  <span class="subsectionToc" >10.1.8 <a
href="#x1-10100010.1.8" id="QQ2-1-123">src_test</a></span>
<br />  <span class="subsectionToc" >10.1.9 <a
href="#x1-10200010.1.9" id="QQ2-1-124">src_install</a></span>
<br />  <span class="subsectionToc" >10.1.10 <a
href="#x1-10300010.1.10" id="QQ2-1-126">pkg_preinst</a></span>
<br />  <span class="subsectionToc" >10.1.11 <a
href="#x1-10400010.1.11" id="QQ2-1-127">pkg_postinst</a></span>
<br />  <span class="subsectionToc" >10.1.12 <a
href="#x1-10500010.1.12" id="QQ2-1-128">pkg_prerm</a></span>
<br />  <span class="subsectionToc" >10.1.13 <a
href="#x1-10600010.1.13" id="QQ2-1-129">pkg_postrm</a></span>
<br />  <span class="subsectionToc" >10.1.14 <a
href="#x1-10700010.1.14" id="QQ2-1-130">pkg_config</a></span>
<br />  <span class="subsectionToc" >10.1.15 <a
href="#x1-10800010.1.15" id="QQ2-1-131">pkg_info</a></span>
<br />  <span class="subsectionToc" >10.1.16 <a
href="#x1-10900010.1.16" id="QQ2-1-133">pkg_nofetch</a></span>
<br />  <span class="subsectionToc" >10.1.17 <a
href="#x1-11000010.1.17" id="QQ2-1-134"><span
class="ectt-1000">default_ </span>Phase Functions</a></span>
<br /> <span class="sectionToc" >10.2 <a
href="#x1-11100010.2" id="QQ2-1-136">Call Order</a></span>
<br /><span class="chapterToc" >11 <a
href="#x1-11200011" id="QQ2-1-137">Eclasses</a></span>
<br /> <span class="sectionToc" >11.1 <a
href="#x1-11300011.1" id="QQ2-1-138">The inherit command</a></span>
<br /> <span class="sectionToc" >11.2 <a
href="#x1-11400011.2" id="QQ2-1-139">Eclass-defined Metadata Keys</a></span>
<br /> <span class="sectionToc" >11.3 <a
href="#x1-11500011.3" id="QQ2-1-140">EXPORT_FUNCTIONS</a></span>
<br /><span class="chapterToc" >12 <a
href="#x1-11600012" id="QQ2-1-142">The Ebuild Environment</a></span>
<br /> <span class="sectionToc" >12.1 <a
href="#x1-11700012.1" id="QQ2-1-143">Defined Variables</a></span>
<br />  <span class="subsectionToc" >12.1.1 <a
href="#x1-11800012.1.1" id="QQ2-1-147">USE and IUSE Handling</a></span>
<br />  <span class="subsectionToc" >12.1.2 <a
href="#x1-11900012.1.2" id="QQ2-1-148"><span
class="ectt-1000">REPLACING_VERSIONS </span>and <span
class="ectt-1000">REPLACED_BY_VERSION</span></a></span>
<br />  <span class="subsectionToc" >12.1.3 <a
href="#x1-12000012.1.3" id="QQ2-1-149">Offset-prefix variables <span
class="ectt-1000">EPREFIX</span>, <span
class="ectt-1000">EROOT </span>and <span
class="ectt-1000">ED</span></a></span>
<br /> <span class="sectionToc" >12.2 <a
href="#x1-12100012.2" id="QQ2-1-151">The state of variables between functions</a></span>
<br /> <span class="sectionToc" >12.3 <a
href="#x1-12300012.3" id="QQ2-1-154">Available commands</a></span>
<br />  <span class="subsectionToc" >12.3.1 <a
href="#x1-12400012.3.1" id="QQ2-1-155">System commands</a></span>
<br />  <span class="subsectionToc" >12.3.2 <a
href="#x1-12600012.3.2" id="QQ2-1-157">Commands provided by package dependencies</a></span>
<br />  <span class="subsectionToc" >12.3.3 <a
href="#x1-12700012.3.3" id="QQ2-1-158">Ebuild-specific Commands</a></span>
<br /> <span class="sectionToc" >12.4 <a
href="#x1-14300012.4" id="QQ2-1-187">The state of the system between functions</a></span>
<br /><span class="chapterToc" >13 <a
href="#x1-14400013" id="QQ2-1-188">Merging and Unmerging</a></span>
<br /> <span class="sectionToc" >13.1 <a
href="#x1-14600013.1" id="QQ2-1-190">Overview</a></span>
<br /> <span class="sectionToc" >13.2 <a
href="#x1-14700013.2" id="QQ2-1-191">Directories</a></span>
<br />  <span class="subsectionToc" >13.2.1 <a
href="#x1-14800013.2.1" id="QQ2-1-192">Permissions</a></span>
<br />  <span class="subsectionToc" >13.2.2 <a
href="#x1-14900013.2.2" id="QQ2-1-193">Empty Directories</a></span>
<br /> <span class="sectionToc" >13.3 <a
href="#x1-15000013.3" id="QQ2-1-194">Regular Files</a></span>
<br />  <span class="subsectionToc" >13.3.1 <a
href="#x1-15100013.3.1" id="QQ2-1-195">Permissions</a></span>
<br />  <span class="subsectionToc" >13.3.2 <a
href="#x1-15200013.3.2" id="QQ2-1-196">File modification times</a></span>
<br />  <span class="subsectionToc" >13.3.3 <a
href="#x1-15300013.3.3" id="QQ2-1-198">Configuration File Protection</a></span>
<br /> <span class="sectionToc" >13.4 <a
href="#x1-15400013.4" id="QQ2-1-199">Symlinks</a></span>
<br />  <span class="subsectionToc" >13.4.1 <a
href="#x1-15500013.4.1" id="QQ2-1-200">Rewriting</a></span>
<br /> <span class="sectionToc" >13.5 <a
href="#x1-15600013.5" id="QQ2-1-201">Hard links</a></span>
<br /> <span class="sectionToc" >13.6 <a
href="#x1-15700013.6" id="QQ2-1-202">Other Files</a></span>
<br /><span class="chapterToc" >14 <a
href="#x1-15800014" id="QQ2-1-203">Metadata Cache</a></span>
<br /> <span class="sectionToc" >14.1 <a
href="#x1-15900014.1" id="QQ2-1-204">Directory Contents</a></span>
<br /> <span class="sectionToc" >14.2 <a
href="#x1-16000014.2" id="QQ2-1-205">Cache File Format</a></span>
<br /><span class="chapterToc" >15 <a
href="#x1-16100015" id="QQ2-1-206">Glossary</a></span>
<br /><span class="appendixToc" >A <a
href="#x1-162000A" id="QQ2-1-207">metadata.xml</a></span>
<br /><span class="appendixToc" >B <a
href="#x1-163000B" id="QQ2-1-208">Unspecified Items</a></span>
<br /><span class="appendixToc" >C <a
href="#x1-164000C" id="QQ2-1-209">Historical Curiosities</a></span>
<br /> <span class="sectionToc" >C.1 <a
href="#x1-165000C.1" id="QQ2-1-210">If-else use blocks</a></span>
<br /> <span class="sectionToc" >C.2 <a
href="#x1-166000C.2" id="QQ2-1-212">cvs Versions</a></span>
<br /> <span class="sectionToc" >C.3 <a
href="#x1-167000C.3" id="QQ2-1-213">use.defaults</a></span>
<br /><span class="appendixToc" >D <a
href="#x1-168000D" id="QQ2-1-214">Feature Availability by EAPI</a></span>
<br /><span class="appendixToc" >E <a
href="#x1-170000E" id="QQ2-1-217">Differences Between EAPIs</a></span>
</div>
<h2 class="likechapterHead"><a
id="x1-2000"></a>List of Algorithms</h2><div class="tableofcontents">
1 <a
href="#x1-28001r1">Version comparison top-level logic</a>
<br />2 <a
href="#x1-28008r2">Version comparison logic for numeric components</a>
<br />3 <a
href="#x1-28025r3">Version comparison logic for each numeric component after the first</a>
<br />4 <a
href="#x1-28041r4">Version comparison logic for letter components</a>
<br />5 <a
href="#x1-28049r5">Version comparison logic for suffixes</a>
<br />6 <a
href="#x1-28069r6">Version comparison logic for each suffix</a>
<br />7 <a
href="#x1-28083r7">Version comparison logic for revision components</a>
<br />8 <a
href="#x1-58001r8">USE masking logic</a>
<br />9 <a
href="#x1-134002r9">econf --libdir logic</a>
<br />10 <a
href="#x1-135001r10">Determining the library directory</a>
</div>
<h2 class="likechapterHead"><a
id="x1-3000"></a>Listings</h2><div class="tableofcontents">
11.1 <a
href="#x1-115001r1">EXPORT_FUNCTIONS example: foo.eclass</a>
<br />12.1 <a
href="#x1-122001r1">Environment state between functions</a>
<br />12.2 <a
href="#x1-134017r2">einstall command</a>
<br />C.1 <a
href="#x1-165001r1">If-else use blocks</a>
</div>
<h2 class="likechapterHead"><a
id="x1-4000"></a>List of Tables</h2><div class="tableofcontents"><span class="lotToc" >5.1 <a
href="#x1-60001r1">Profile-defined <span
class="ectt-1000">IUSE </span>injection for EAPIs</a></span><br /><span class="lotToc" >8.1 <a
href="#x1-69001r1">EAPIs supporting
<span
class="ectt-1000">IUSE </span>defaults</a></span><br /><span class="lotToc" >8.2 <a
href="#x1-70001r2">EAPIs supporting <span
class="ectt-1000">PROPERTIES</span></a></span><br /><span class="lotToc" >8.3 <a
href="#x1-72001r3">EAPIs with <span
class="ectt-1000">RDEPEND=DEPEND</span>
Default</a></span><br /><span class="lotToc" >8.4 <a
href="#x1-75001r4">EAPIs supporting <span
class="ectt-1000">DEFINED_PHASES</span></a></span><br /><span class="lotToc" >9.1 <a
href="#x1-78001r1">EAPIs supporting <span
class="ectt-1000">SRC_URI</span>
arrows</a></span><br /><span class="lotToc" >9.2 <a
href="#x1-83001r2">EAPIs supporting <span
class="ectt-1000">SLOT </span>dependencies</a></span><br /><span class="lotToc" >9.3 <a
href="#x1-83002r3">EAPIs supporting <span
class="ectt-1000">USE</span>
dependencies</a></span><br /><span class="lotToc" >9.4 <a
href="#x1-85001r4">Exclamation mark strengths for EAPIs</a></span><br /><span class="lotToc" >10.1 <a
href="#x1-94001r1">EAPIs with <span
class="ectt-1000">S </span>to
<span
class="ectt-1000">WORKDIR </span>fallbacks</a></span><br /><span class="lotToc" >10.2 <a
href="#x1-95001r2">EAPIs supporting <span
class="ectt-1000">pkg_pretend</span></a></span><br /><span class="lotToc" >10.3 <a
href="#x1-98001r3">EAPIs supporting
<span
class="ectt-1000">src_prepare</span></a></span><br /><span class="lotToc" >10.4 <a
href="#x1-99001r4">EAPIs supporting <span
class="ectt-1000">src_configure</span></a></span><br /><span class="lotToc" >10.5 <a
href="#x1-100001r5"><span
class="ectt-1000">src_compile </span>behaviour for
EAPIs</a></span><br /><span class="lotToc" >10.6 <a
href="#x1-102001r6"><span
class="ectt-1000">src_install </span>behaviour for EAPIs</a></span><br /><span class="lotToc" >10.7 <a
href="#x1-108001r7">EAPIs supporting <span
class="ectt-1000">pkg_info </span>on
non-installed packages</a></span><br /><span class="lotToc" >10.8 <a
href="#x1-110001r8">EAPIs supporting <span
class="ectt-1000">default_ </span>phase functions</a></span><br /><span class="lotToc" >12.1 <a
href="#x1-117002">Defined
variables</a></span><br /><span class="lotToc" >12.2 <a
href="#x1-117008r2">EAPIs supporting various env variables</a></span><br /><span class="lotToc" >12.3 <a
href="#x1-117009r3">EAPIs supporting offset-prefix
env variables</a></span><br /><span class="lotToc" >12.4 <a
href="#x1-120001r4">EAPIs supporting offset-prefix</a></span><br /><span class="lotToc" >12.5 <a
href="#x1-128001r5">EAPI Command Failure
Behaviour</a></span><br /><span class="lotToc" >12.6 <a
href="#x1-129001r6">Banned commands</a></span><br /><span class="lotToc" >12.7 <a
href="#x1-134001r7">Extra <span
class="ectt-1000">econf </span>arguments for EAPIs</a></span><br /><span class="lotToc" >12.8 <a
href="#x1-135018r8">EAPIs
supporting <span
class="ectt-1000">dodoc -r</span></a></span><br /><span class="lotToc" >12.9 <a
href="#x1-135019r9">EAPIs supporting symlinks for <span
class="ectt-1000">doins</span></a></span><br /><span class="lotToc" >12.10 <a
href="#x1-135020r10">EAPIs supporting
<span
class="ectt-1000">doman </span>languages</a></span><br /><span class="lotToc" >12.11 <a
href="#x1-137001r11">EAPIs supporting controllable compression</a></span><br /><span class="lotToc" >12.12 <a
href="#x1-138001r12">EAPI
Behaviour for Use Queries not in IUSE_EFFECTIVE</a></span><br /><span class="lotToc" >12.13 <a
href="#x1-140001r13"><span
class="ectt-1000">unpack </span>extensions
for EAPIs</a></span><br /><span class="lotToc" >12.14 <a
href="#x1-140002r14">EAPIs supporting the <span
class="ectt-1000">default </span>function</a></span><br /><span class="lotToc" >13.1 <a
href="#x1-152001r1">Preservation of
file modification times (mtimes)</a></span><br /><span class="lotToc" >D.1 <a
href="#x1-169002">Features in EAPIs</a></span><br />
</div>
<h3 class="likesectionHead"><a
id="x1-5000"></a>Acknowledgements</h3>
<!--l. 3--><p class="noindent" >Thanks to Mike Kelly (package manager provided utilities, section <a
href="#x1-12700012.3.3">12.3.3<!--tex4ht:ref: sec:pkg-mgr-commands --></a>), Danny van Dyk (ebuild
functions, section <a
href="#x1-9200010">10<!--tex4ht:ref: sec:ebuild-functions --></a>), David Leverton (various sections), Petteri Räty (environment state,
section <a
href="#x1-12100012.2">12.2<!--tex4ht:ref: sec:ebuild-env-state --></a>) and Ulrich Müller (various sections) for contributions. Thanks to Christian
Faulhammer for fixing some of the more horrible formatting screwups and providing the EAPI
cheat sheet. Thanks also to Mike Frysinger and Brian Harring for proof-reading and suggestions for
fixes and/or clarification.
</p><!--l. 13--><p class="noindent" >
</p>
<h3 class="likesectionHead"><a
id="x1-6000"></a>Copyright and Licence</h3>
<!--l. 15--><p class="noindent" >The bulk of this document is <span
class="cmsy-10">© </span>2007, 2008, 2009 Stephen Bennett and Ciaran McCreesh.
Contributions are owned by their respective authors, and may have been changed substantially
before inclusion.
</p><!--l. 19--><p class="noindent" >This document is released under the Creative Commons Attribution-Share Alike 3.0 Licence. The
full text of this licence can be found at <a
href="http://creativecommons.org/licenses/by-sa/3.0/" class="url" ><span
class="ectt-1000">http://creativecommons.org/licenses/by-sa/3.0/</span></a>.
</p><!--l. 22--><p class="noindent" >
</p>
<h3 class="likesectionHead"><a
id="x1-7000"></a>Reporting Issues</h3>
<!--l. 24--><p class="noindent" >Issues (inaccuracies, wording problems, omissions etc.) in this document should be reported via
Gentoo Bugzilla using product <span
class="ecti-1000">Gentoo Hosted Projects</span>, component <span
class="ecti-1000">PMS/EAPI </span>and the default
assignee. There should be one bug per issue, and one issue per bug.
</p><!--l. 28--><p class="noindent" >Patches (in <span
class="ectt-1000">git format-patch </span>form if possible) may be submitted either via Bugzilla or to the
<span
class="ectt-1000">gentoo-pms@gentoo.org </span>mailing list. Patches will be reviewed by the PMS team, who will do one
of the following:
</p><!--l. 33--><p class="noindent" >
</p><ul>
<li class="compactitem">Accept and apply the patch.
</li>
<li class="compactitem">Explain why the patch cannot be applied as-is. The patch may then be updated and
resubmitted if appropriate.
</li>
<li class="compactitem">Reject the patch outright.
</li>
<li class="compactitem">Take special action merited by the individual circumstances.</li></ul>
<!--l. 40--><p class="noindent" >When reporting issues, remember that this document is not the appropriate place for pushing
through changes to the tree or the package manager, except where those changes are
bugs.
</p><!--l. 43--><p class="noindent" >If any issue cannot be resolved by the PMS team, it may be escalated to the Gentoo
Council.
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter 1</span><br /><a
id="x1-80001"></a>Introduction</h2>
<h3 class="sectionHead"><span class="titlemark">1.1 </span> <a
id="x1-90001.1"></a>Aims and Motivation</h3>
<!--l. 5--><p class="noindent" >This document aims to fully describe the format of an ebuild repository and the ebuilds therein,
as well as certain aspects of package manager behaviour required to support such a
repository.
</p><!--l. 8--><p class="noindent" >This document is <span
class="ecti-1000">not </span>designed to be an introduction to ebuild development. Prior knowledge of
ebuild creation and an understanding of how the package management system works is assumed;
certain less familiar terms are explained in the Glossary in chapter <a
href="#x1-16100015">15<!--tex4ht:ref: sec:glossary --></a>.
</p><!--l. 12--><p class="noindent" >This document does not specify any user or package manager configuration information.
</p><!--l. 14--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">1.2 </span> <a
id="x1-100001.2"></a>Rationale</h3>
<!--l. 16--><p class="noindent" >At present the only definition of what an ebuild can assume about its environment,
and the only definition of what is valid in an ebuild, is the source code of the latest
Portage release and a general consensus about which features are too new to assume
availability. This has several drawbacks: not only is it impossible to change any aspect of
Portage behaviour without verifying that nothing in the tree relies upon it, but if a new
package manager should appear it becomes impossible to fully support such an ill-defined
standard.
</p><!--l. 23--><p class="noindent" >This document aims to address both of these concerns by defining almost all aspects of what an
ebuild repository looks like, and how an ebuild is allowed to behave. Thus, both Portage and other
package managers can change aspects of their behaviour not defined here without worry of
incompatibilities with any particular repository.
</p><!--l. 28--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">1.3 </span> <a
id="x1-110001.3"></a>Conventions</h3>
<!--l. 30--><p class="noindent" >Text in <span
class="ectt-1000">teletype </span>is used for filenames or variable names. <span
class="ecti-1000">Italic </span>text is used for terms with a
particular technical meaning in places where there may otherwise be ambiguity.
</p><!--l. 33--><p class="noindent" >The term <span
class="ecti-1000">package manager </span>is used throughout this document in a broad sense. Although some
parts of this document are only relevant to fully featured package managers, many items are
equally applicable to tools or other applications that interact with ebuilds or ebuild
repositories.
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter 2</span><br /><a
id="x1-120002"></a>EAPIs</h2>
<h3 class="sectionHead"><span class="titlemark">2.1 </span> <a
id="x1-130002.1"></a>Definition</h3>
<!--l. 5--><p class="noindent" >An EAPI can be thought of as a ‘version’ of this specification to which a package conforms. An
EAPI value is a string, and is part of an ebuild’s metadata.
</p><!--l. 8--><p class="noindent" >If a package manager encounters a package version with an unrecognised EAPI, it must not
attempt to perform any operations upon it. It could, for example, ignore the package version
entirely (although this can lead to user confusion), or it could mark the package version as masked.
A package manager must not use any metadata generated from a package with an unrecognised
EAPI.
</p><!--l. 13--><p class="noindent" >The package manager must not attempt to perform any kind of comparison test other than
equality upon EAPIs.
</p><!--l. 16--><p class="noindent" >EAPIs are also used for profile directories, as described in section <a
href="#x1-470005.2.2">5.2.2<!--tex4ht:ref: sec:profile-eapi --></a>.
</p><!--l. 18--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">2.2 </span> <a
id="x1-140002.2"></a>Defined EAPIs</h3>
<!--l. 20--><p class="noindent" >The following EAPIs are defined by this specification:
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">0</span> </dt><dd
class="description">The ‘original’ base EAPI.
</dd><dt class="description">
<span
class="ecbx-1000">1</span> </dt><dd
class="description">EAPI ‘1’ contains a number of extensions to EAPI ‘0’. Except where explicitly noted, it
is in all other ways identical to EAPI ‘0’.
</dd><dt class="description">
<span
class="ecbx-1000">2</span> </dt><dd
class="description">EAPI ‘2’ contains a number of extensions to EAPI ‘1’. Except where explicitly noted, it
is in all other ways identical to EAPI ‘1’.
</dd><dt class="description">
<span
class="ecbx-1000">3</span> </dt><dd
class="description">EAPI ‘3’ contains a number of extensions to EAPI ‘2’. Except where explicitly noted, it
is in all other ways identical to EAPI ‘2’.
</dd><dt class="description">
<span
class="ecbx-1000">4</span> </dt><dd
class="description">EAPI ‘4’ contains a number of extensions to EAPI ‘3’. Except where explicitly noted, it
is in all other ways identical to EAPI ‘3’.</dd></dl>
<!--l. 34--><p class="noindent" >Except where explicitly noted, everything in this specification applies to all of the above
EAPIs.<span class="footnote-mark"><a
href="pms2.html#fn1x3"><sup class="textsuperscript">1</sup></a></span><a
id="x1-14001f1"></a>
</p>
<h3 class="sectionHead"><span class="titlemark">2.3 </span> <a
id="x1-150002.3"></a>Reserved EAPIs</h3>
<!--l. 43--><p class="noindent" >
</p><ul>
<li class="compactitem">EAPIs whose value consists purely of an integer are reserved for future versions of this
specification.
</li>
<li class="compactitem">EAPIs whose value starts with the string <span
class="ectt-1000">paludis- </span>are reserved for experimental use
by the Paludis package manager.</li></ul>
<h2 class="chapterHead"><span class="titlemark">Chapter 3</span><br /><a
id="x1-160003"></a>Names and Versions</h2>
<h3 class="sectionHead"><span class="titlemark">3.1 </span> <a
id="x1-170003.1"></a>Restrictions upon Names</h3>
<!--l. 5--><p class="noindent" >No name may be empty. Package managers must not impose fixed upper boundaries upon the
length of any name. A package manager should indicate or reject any name that is invalid
according to these rules.
</p><!--l. 8--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">3.1.1 </span> <a
id="x1-180003.1.1"></a>Category Names</h4>
<!--l. 9--><p class="noindent" >A category name may contain any of the characters [<span
class="ectt-1000">A-Za-z0-9+_.-</span>]. It must not begin with a
hyphen or a dot.
</p>
<!--l. 12--><p class="noindent" ><span class="paragraphHead"><a
id="x1-190003.1.1"></a><span
class="ecbx-1000">Note:</span></span>
A hyphen is <span
class="ecti-1000">not </span>required because of the <span
class="ectt-1000">virtual </span>category. Usually, however, category names will
contain a hyphen.
</p><!--l. 15--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">3.1.2 </span> <a
id="x1-200003.1.2"></a>Package Names</h4>
<!--l. 16--><p class="noindent" >A package name may contain any of the characters [<span
class="ectt-1000">A-Za-z0-9+_-</span>]. It must not begin with a
hyphen, and must not end in a hyphen followed by one or more digits.
</p>
<!--l. 19--><p class="noindent" ><span class="paragraphHead"><a
id="x1-210003.1.2"></a><span
class="ecbx-1000">Note:</span></span>
A package name does not include the category. The term <span
class="ecti-1000">qualified package name </span>is used where a
<span
class="ectt-1000">category/package </span>pair is meant.
</p><!--l. 22--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">3.1.3 </span> <a
id="x1-220003.1.3"></a>Slot Names</h4>
<!--l. 24--><p class="noindent" >A slot name may contain any of the characters [<span
class="ectt-1000">A-Za-z0-9+_.-</span>]. It must not begin with a hyphen
or a dot.
</p><!--l. 27--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">3.1.4 </span> <a
id="x1-230003.1.4"></a>USE Flag Names</h4>
<!--l. 28--><p class="noindent" >A USE flag name may contain any of the characters [<span
class="ectt-1000">A-Za-z0-9+_@-</span>]. It must begin with an
alphanumeric character. Underscores should be considered reserved for <span
class="ectt-1000">USE_EXPAND</span>, as described in
section <a
href="#x1-11800012.1.1">12.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a>.
</p>
<!--l. 32--><p class="noindent" ><span class="paragraphHead"><a
id="x1-240003.1.4"></a><span
class="ecbx-1000">Note:</span></span>
The at-sign is required for <span
class="ectt-1000">LINGUAS</span>.
</p><!--l. 34--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">3.1.5 </span> <a
id="x1-250003.1.5"></a>Repository Names</h4>
<!--l. 36--><p class="noindent" >A repository name may contain any of the characters [<span
class="ectt-1000">A-Za-z0-9_-</span>]. It must not begin with a
hyphen.
</p><!--l. 39--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">3.1.6 </span> <a
id="x1-260003.1.6"></a>Keyword Names</h4>
<!--l. 41--><p class="noindent" >A keyword name may contain any of the characters [<span
class="ectt-1000">A-Za-z0-9_-</span>]. It must not begin with a
hyphen. In contexts where it makes sense to do so, a keyword name may be prefixed by a tilde or a
hyphen. In <span
class="ectt-1000">KEYWORDS</span>, <span
class="ectt-1000">-* </span>is also acceptable as a keyword, to indicate that a package will only work
on listed targets.
</p><!--l. 46--><p class="noindent" >A tilde prefixed keyword is, by convention, used to indicate a less stable package. It is generally
assumed that any user accepting keyword <span
class="ectt-1000">~foo </span>will also accept <span
class="ectt-1000">foo</span>.
</p><!--l. 49--><p class="noindent" >The exact meaning of any keywords value is beyond the scope of this specification.
</p><!--l. 51--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">3.2 </span> <a
id="x1-270003.2"></a>Version Specifications</h3>
<!--l. 52--><p class="noindent" >The package manager must not impose fixed limits upon the number of version components.
Package managers should indicate or reject any version that is invalid according to these
rules.
</p><!--l. 55--><p class="noindent" >A version starts with the number part, which is in the form <span
class="ectt-1000">[0-9]+(</span><span
class="cmsy-10">\</span><span
class="ectt-1000">.[0-9]+)* </span>(a positive
integer, followed by zero or more dot-prefixed positive integers).
</p><!--l. 58--><p class="noindent" >This may optionally be followed by one of <span
class="ectt-1000">[a-z] </span>(a lowercase letter).
</p><!--l. 60--><p class="noindent" >This may be followed by zero or more of the suffixes <span
class="ectt-1000">_alpha</span>, <span
class="ectt-1000">_beta</span>, <span
class="ectt-1000">_pre</span>, <span
class="ectt-1000">_rc </span>or <span
class="ectt-1000">_p</span>, which
themselves may be suffixed by an optional integer.
</p><!--l. 63--><p class="noindent" >This may optionally be followed by the suffix <span
class="ectt-1000">-r </span>followed immediately by an integer (the “revision
number”). If this suffix is not present, it is assumed to be <span
class="ectt-1000">-r0</span>.
</p><!--l. 66--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">3.3 </span> <a
id="x1-280003.3"></a>Version Comparison</h3>
<!--l. 68--><p class="noindent" >Version specifications are compared component by component, moving from left to right, as
detailed in Algorithm <a
href="#x1-28001r1">1<!--tex4ht:ref: alg:version-comparison --></a> and sub-algorithms. If a sub-algorithm returns a decision, then that is the
result of the whole comparison; if it terminates without returning a decision, the process continues
from the point from which it was invoked.
</p>
<div class="algorithm">
<!--l. 75--><p class="noindent" ><a
id="x1-28001r1"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Algorithm 1: </span><span
class="content">Version comparison top-level logic</span></div><!--tex4ht:label?: x1-28001r1 -->
<div class="algorithmic">
<a
id="x1-28002r1"></a>
<span class="ALCitem"><span class="ecrm-0800"> 1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> let <span
class="cmmi-10">A </span>and <span
class="cmmi-10">B </span>be the versions to be compared <a
id="x1-28003r2"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> compare numeric components using Algorithm <a
href="#x1-28008r2">2<!--tex4ht:ref: alg:version-comparison-numeric --></a> <a
id="x1-28004r3"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> compare letter components using Algorithm <a
href="#x1-28041r4">4<!--tex4ht:ref: alg:version-comparison-letter --></a> <a
id="x1-28005r4"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> compare suffixes using Algorithm <a
href="#x1-28049r5">5<!--tex4ht:ref: alg:version-comparison-suffix --></a> <a
id="x1-28006r5"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> compare revision components using Algorithm <a
href="#x1-28083r7">7<!--tex4ht:ref: alg:version-comparison-revision --></a> <a
id="x1-28007r6"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A </span><span
class="cmr-10">= </span><span
class="cmmi-10">B</span>
</div>
</div><hr class="endfloat" />
</div>
<div class="algorithm">
<!--l. 87--><p class="noindent" ><a
id="x1-28008r2"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Algorithm 2: </span><span
class="content">Version comparison logic for numeric components</span></div><!--tex4ht:label?: x1-28008r2 -->
<div class="algorithmic">
<a
id="x1-28009r7"></a>
<span class="ALCitem"><span class="ecrm-0800"> 1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> define the notations <span
class="cmmi-10">An</span><sub><span
class="cmmi-7">k</span></sub> and <span
class="cmmi-10">Bn</span><sub><span
class="cmmi-7">k</span></sub> to mean the <span
class="cmmi-10">k</span><sup class="textsuperscript"><span
class="ecrm-0900">th</span></sup> numeric component of <span
class="cmmi-10">A </span>and <span
class="cmmi-10">B</span>
respectively, using <span
class="cmr-10">0</span>-based indexing <a
id="x1-28010r8"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">An</span><sub><span
class="cmr-7">0</span></sub> <span
class="cmmi-10">> Bn</span><sub><span
class="cmr-7">0</span></sub> using integer comparison <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28011r9"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A > B</span>
</span><a
id="x1-28012r10"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">else</span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">An</span><sub><span
class="cmr-7">0</span></sub> <span
class="cmmi-10">< Bn</span><sub><span
class="cmr-7">0</span></sub> using integer comparison <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28013r11"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A < B</span>
</span><a
id="x1-28014r12"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span><a
id="x1-28015r13"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> let <span
class="cmmi-10">Ann </span>be the number of numeric components of <span
class="cmmi-10">A</span> <a
id="x1-28016r14"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 8:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> let <span
class="cmmi-10">Bnn </span>be the number of numeric components of <span
class="cmmi-10">B</span> <a
id="x1-28017r15"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 9:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">for all</span> <span
class="cmmi-10">i </span>such that <span
class="cmmi-10">i </span><span
class="cmsy-10">≥ </span><span
class="cmr-10">1 </span>and <span
class="cmmi-10">i < Ann </span>and <span
class="cmmi-10">i < Bnn</span>, in ascending order <span
class="ecbx-1000">do</span><span class="for-body">
<a
id="x1-28018r16"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">10:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> compare <span
class="cmmi-10">An</span><sub><span
class="cmmi-7">i</span></sub> and <span
class="cmmi-10">Bn</span><sub><span
class="cmmi-7">i</span></sub> using Algorithm <a
href="#x1-28025r3">3<!--tex4ht:ref: alg:version-comparison --></a>
</span><a
id="x1-28019r17"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">11:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">for</span><a
id="x1-28020r18"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">12:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">Ann > Bnn</span> <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28021r19"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">13:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A > B</span>
</span><a
id="x1-28022r20"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">14:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">else</span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">Ann < Bnn</span> <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28023r21"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">15:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A < B</span>
</span><a
id="x1-28024r22"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">16:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span>
</div>
</div><hr class="endfloat" />
</div>
<div class="algorithm">
<!--l. 109--><p class="noindent" ><a
id="x1-28025r3"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Algorithm 3: </span><span
class="content">Version comparison logic for each numeric component after the first</span></div><!--tex4ht:label?: x1-28025r3 -->
<div class="algorithmic">
<a
id="x1-28026r23"></a>
<span class="ALCitem"><span class="ecrm-0800"> 1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">if</span> either <span
class="cmmi-10">An</span><sub><span
class="cmmi-7">i</span></sub> or <span
class="cmmi-10">Bn</span><sub><span
class="cmmi-7">i</span></sub> has a leading <span
class="ectt-1000">0</span> <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28027r24"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> let <span
class="cmmi-10">An</span><span
class="cmsy-10">′</span><sub><span
class="cmmi-7">i</span></sub> be <span
class="cmmi-10">An</span><sub><span
class="cmmi-7">i</span></sub> with any trailing <span
class="ectt-1000">0</span>s removed <a
id="x1-28028r25"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> let <span
class="cmmi-10">Bn</span><span
class="cmsy-10">′</span><sub><span
class="cmmi-7">i</span></sub> be <span
class="cmmi-10">Bn</span><sub><span
class="cmmi-7">i</span></sub> with any trailing <span
class="ectt-1000">0</span>s removed <a
id="x1-28029r26"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">An</span><span
class="cmsy-10">′</span><sub><span
class="cmmi-7">i</span></sub> <span
class="cmmi-10">> Bn</span><span
class="cmsy-10">′</span><sub><span
class="cmmi-7">i</span></sub> using ASCII stringwise comparison <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28030r27"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A > B</span>
</span><a
id="x1-28031r28"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">else</span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">An</span><span
class="cmsy-10">′</span><sub><span
class="cmmi-7">i</span></sub> <span
class="cmmi-10">< Bn</span><span
class="cmsy-10">′</span><sub><span
class="cmmi-7">i</span></sub> using ASCII stringwise comparison <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28032r29"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A < B</span>
</span><a
id="x1-28033r30"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 8:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span>
</span><a
id="x1-28034r31"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 9:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">else</span><span class="else-body">
<a
id="x1-28035r32"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">10:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">An</span><sub><span
class="cmmi-7">i</span></sub> <span
class="cmmi-10">> Bn</span><sub><span
class="cmmi-7">i</span></sub> using integer comparison <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28036r33"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">11:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A > B</span>
</span><a
id="x1-28037r34"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">12:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">else</span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">An</span><sub><span
class="cmmi-7">i</span></sub> <span
class="cmmi-10">< Bn</span><sub><span
class="cmmi-7">i</span></sub> using integer comparison <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28038r35"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">13:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A < B</span>
</span><a
id="x1-28039r36"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">14:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span>
</span><a
id="x1-28040r37"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">15:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span>
</div>
</div><hr class="endfloat" />
</div>
<div class="algorithm">
<!--l. 130--><p class="noindent" ><a
id="x1-28041r4"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Algorithm 4: </span><span
class="content">Version comparison logic for letter components</span></div><!--tex4ht:label?: x1-28041r4 -->
<div class="algorithmic">
<a
id="x1-28042r38"></a>
<span class="ALCitem"><span class="ecrm-0800"> 1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> let <span
class="cmmi-10">Al </span>be the letter component of <span
class="cmmi-10">A </span>if any, otherwise the empty string <a
id="x1-28043r39"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> let <span
class="cmmi-10">Bl </span>be the letter component of <span
class="cmmi-10">B </span>if any, otherwise the empty string <a
id="x1-28044r40"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">Al > Bl </span>using ASCII stringwise comparison <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28045r41"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A > B</span>
</span><a
id="x1-28046r42"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">else</span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">Al < Bl </span>using ASCII stringwise comparison <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28047r43"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A < B</span>
</span><a
id="x1-28048r44"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span>
</div>
</div><hr class="endfloat" />
</div>
<div class="algorithm">
<!--l. 143--><p class="noindent" ><a
id="x1-28049r5"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Algorithm 5: </span><span
class="content">Version comparison logic for suffixes</span></div><!--tex4ht:label?: x1-28049r5 -->
<div class="algorithmic">
<a
id="x1-28050r45"></a>
<span class="ALCitem"><span class="ecrm-0800"> 1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> define the notations <span
class="cmmi-10">As</span><sub><span
class="cmmi-7">k</span></sub> and <span
class="cmmi-10">Bs</span><sub><span
class="cmmi-7">k</span></sub> to mean the <span
class="cmmi-10">k</span><sup class="textsuperscript"><span
class="ecrm-0900">th</span></sup> suffix of <span
class="cmmi-10">A </span>and <span
class="cmmi-10">B </span>respectively, using
<span
class="cmr-10">0</span>-based indexing <a
id="x1-28051r46"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> let <span
class="cmmi-10">Asn </span>be the number of suffixes of <span
class="cmmi-10">A</span> <a
id="x1-28052r47"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> let <span
class="cmmi-10">Bsn </span>be the number of suffixes of <span
class="cmmi-10">B</span> <a
id="x1-28053r48"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">for all</span> <span
class="cmmi-10">i </span>such that <span
class="cmmi-10">i </span><span
class="cmsy-10">≥ </span><span
class="cmr-10">0 </span>and <span
class="cmmi-10">i < Asn </span>and <span
class="cmmi-10">i < Bsn</span>, in ascending order <span
class="ecbx-1000">do</span><span class="for-body">
<a
id="x1-28054r49"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> compare <span
class="cmmi-10">As</span><sub><span
class="cmmi-7">i</span></sub> and <span
class="cmmi-10">Bs</span><sub><span
class="cmmi-7">i</span></sub> using Algorithm <a
href="#x1-28069r6">6<!--tex4ht:ref: alg:version-comparison --></a>
</span><a
id="x1-28055r50"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">for</span><a
id="x1-28056r51"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">Asn > Bsn</span> <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28057r52"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 8:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">As</span><sub><span
class="cmmi-7">Bsn</span></sub> is of type <span
class="ectt-1000">_p</span> <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28058r53"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 9:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A > B</span>
</span><a
id="x1-28059r54"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">10:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">else</span><span class="else-body">
<a
id="x1-28060r55"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">11:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A < B</span>
</span><a
id="x1-28061r56"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">12:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span>
</span><a
id="x1-28062r57"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">13:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">else</span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">Asn < Bsn</span> <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28063r58"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">14:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">Bs</span><sub><span
class="cmmi-7">Asn</span></sub> is of type <span
class="ectt-1000">_p</span> <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28064r59"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">15:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A < B</span>
</span><a
id="x1-28065r60"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">16:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">else</span><span class="else-body">
<a
id="x1-28066r61"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">17:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A > B</span>
</span><a
id="x1-28067r62"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">18:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span>
</span><a
id="x1-28068r63"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">19:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span>
</div>
</div><hr class="endfloat" />
</div>
<div class="algorithm">
<!--l. 168--><p class="noindent" ><a
id="x1-28069r6"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Algorithm 6: </span><span
class="content">Version comparison logic for each suffix</span></div><!--tex4ht:label?: x1-28069r6 -->
<div class="algorithmic">
<a
id="x1-28070r64"></a>
<span class="ALCitem"><span class="ecrm-0800"> 1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">As</span><sub><span
class="cmmi-7">i</span></sub> and <span
class="cmmi-10">Bs</span><sub><span
class="cmmi-7">i</span></sub> are of the same type (<span
class="ectt-1000">_alpha </span>vs <span
class="ectt-1000">_beta </span>etc) <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28071r65"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> let <span
class="cmmi-10">As</span><span
class="cmsy-10">′</span><sub><span
class="cmmi-7">i</span></sub> be the integer part of <span
class="cmmi-10">As</span><sub><span
class="cmmi-7">i</span></sub> if any, otherwise <span
class="ectt-1000">0</span> <a
id="x1-28072r66"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> let <span
class="cmmi-10">Bs</span><span
class="cmsy-10">′</span><sub><span
class="cmmi-7">i</span></sub> be the integer part of <span
class="cmmi-10">Bs</span><sub><span
class="cmmi-7">i</span></sub> if any, otherwise <span
class="ectt-1000">0</span> <a
id="x1-28073r67"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">As</span><span
class="cmsy-10">′</span><sub><span
class="cmmi-7">i</span></sub> <span
class="cmmi-10">> Bs</span><span
class="cmsy-10">′</span><sub><span
class="cmmi-7">i</span></sub>, using integer comparison <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28074r68"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A > B</span>
</span><a
id="x1-28075r69"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">else</span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">As</span><span
class="cmsy-10">′</span><sub><span
class="cmmi-7">i</span></sub> <span
class="cmmi-10">< Bs</span><span
class="cmsy-10">′</span><sub><span
class="cmmi-7">i</span></sub>, using integer comparison <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28076r70"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A < B</span>
</span><a
id="x1-28077r71"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 8:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span>
</span><a
id="x1-28078r72"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 9:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">else</span> <span
class="ecbx-1000">if</span> the type of <span
class="cmmi-10">As</span><sub><span
class="cmmi-7">i</span></sub> is greater than the type of <span
class="cmmi-10">Bs</span><sub><span
class="cmmi-7">i</span></sub> using the ordering
<span
class="ectt-1000">_alpha</span> <span
class="cmmi-10"><</span> <span
class="ectt-1000">_beta</span> <span
class="cmmi-10"><</span> <span
class="ectt-1000">_pre</span> <span
class="cmmi-10"><</span> <span
class="ectt-1000">_rc</span> <span
class="cmmi-10"><</span> <span
class="ectt-1000">_p</span> <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28079r73"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">10:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A > B</span>
</span><a
id="x1-28080r74"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">11:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">else</span><span class="else-body">
<a
id="x1-28081r75"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">12:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A < B</span>
</span><a
id="x1-28082r76"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">13:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span>
</div>
</div><hr class="endfloat" />
</div>
<div class="algorithm">
<!--l. 187--><p class="noindent" ><a
id="x1-28083r7"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Algorithm 7: </span><span
class="content">Version comparison logic for revision components</span></div><!--tex4ht:label?: x1-28083r7 -->
<div class="algorithmic">
<a
id="x1-28084r77"></a>
<span class="ALCitem"><span class="ecrm-0800"> 1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> let <span
class="cmmi-10">Ar </span>be the integer part of the revision component of <span
class="cmmi-10">A </span>if any, otherwise <span
class="ectt-1000">0</span> <a
id="x1-28085r78"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> let <span
class="cmmi-10">Br </span>be the integer part of the revision component of <span
class="cmmi-10">B </span>if any, otherwise <span
class="ectt-1000">0</span> <a
id="x1-28086r79"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">Ar > Br </span>using integer comparison <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28087r80"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A > B</span>
</span><a
id="x1-28088r81"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">else</span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">Ar < Br </span>using integer comparison <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-28089r82"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">return </span> <span
class="cmmi-10">A < B</span>
</span><a
id="x1-28090r83"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span>
</div>
</div><hr class="endfloat" />
</div>
<h3 class="sectionHead"><span class="titlemark">3.4 </span> <a
id="x1-290003.4"></a>Uniqueness of versions</h3>
<!--l. 201--><p class="noindent" >No two packages in a given repository may have the same qualified package name and equal
versions. For example, a repository may not contain more than one of <span
class="ectt-1000">foo-bar/baz-1.0.2</span>,
<span
class="ectt-1000">foo-bar/baz-1.0.2-r0 </span>and <span
class="ectt-1000">foo-bar/baz-1.000.2</span>.
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter 4</span><br /><a
id="x1-300004"></a>Tree Layout</h2>
<!--l. 3--><p class="noindent" >This chapter defines the layout on-disk of an ebuild repository. In all cases below where a file or
directory is specified, a symlink to a file or directory is also valid. In this case, the package manager
must follow the operating system’s semantics for symbolic links and must not behave differently
from normal.
</p>
<h3 class="sectionHead"><span class="titlemark">4.1 </span> <a
id="x1-310004.1"></a>Top Level</h3>
<!--l. 10--><p class="noindent" >An ebuild repository shall occupy one directory on disk, with the following subdirectories:
</p><ul>
<li class="compactitem">One directory per category, whose name shall be the name of the category. The layout
of these directories shall be as described in section <a
href="#x1-320004.2">4.2<!--tex4ht:ref: sec:category-dirs --></a>.
</li>
<li class="compactitem">A <span
class="ectt-1000">profiles </span>directory, described in section <a
href="#x1-340004.4">4.4<!--tex4ht:ref: sec:profiles-dir --></a>.
</li>
<li class="compactitem">A <span
class="ectt-1000">licenses </span>directory (optional), described in section <a
href="#x1-390004.5">4.5<!--tex4ht:ref: sec:licenses-dir --></a>.
</li>
<li class="compactitem">An <span
class="ectt-1000">eclass </span>directory (optional), described in section <a
href="#x1-400004.6">4.6<!--tex4ht:ref: sec:eclass-dir --></a>.
</li>
<li class="compactitem">A <span
class="ectt-1000">metadata </span>directory (optional), described in section <a
href="#x1-410004.7">4.7<!--tex4ht:ref: sec:metadata-dir --></a>.
</li>
<li class="compactitem">Other optional support files and directories (skeleton ebuilds or ChangeLogs, for
example) may exist but are not covered by this specification. The package manager
must ignore any of these files or directories that it does not recognise.
</li></ul>
<!--l. 24--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">4.2 </span> <a
id="x1-320004.2"></a>Category Directories</h3>
<!--l. 27--><p class="noindent" >Each category provided by the repository (see also: the <span
class="ectt-1000">profiles/categories </span>file, section <a
href="#x1-340004.4">4.4<!--tex4ht:ref: profiles-categories --></a>)
shall be contained in one directory, whose name shall be that of the category. Each category
directory shall contain:
</p><ul>
<li class="compactitem">A <span
class="ectt-1000">metadata.xml </span>file, as described in appendix <a
href="#x1-162000A">A<!--tex4ht:ref: sec:metadata-xml --></a>. Optional.
</li>
<li class="compactitem">Zero or more package directories, one for each package in the category, as described
in section <a
href="#x1-330004.3">4.3<!--tex4ht:ref: sec:package-dirs --></a>. The name of the package directory shall be the corresponding package
name.</li></ul>
<!--l. 38--><p class="noindent" >Category directories may contain additional files, whose purpose is not covered by this
specification. Additional directories that are not for a package may <span
class="ecti-1000">not </span>be present, to avoid
conflicts with package name directories; an exception is made for filesystem components whose
name starts with a dot, which the package manager must ignore, and for any directory named
<span
class="ectt-1000">CVS</span>.
</p><!--l. 43--><p class="noindent" >It is not required that a directory exists for each category provided by the repository. A category
directory that does not exist shall be considered equivalent to an empty category (and by
extension, a package manager may treat an empty category as a category that does not
exist).
</p><!--l. 47--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">4.3 </span> <a
id="x1-330004.3"></a>Package Directories</h3>
<!--l. 50--><p class="noindent" >A package directory contains the following:
</p><ul>
<li class="compactitem">Zero or more ebuilds. These are as described in section <a
href="#x1-650007">7<!--tex4ht:ref: sec:ebuild-format --></a> and others.
</li>
<li class="compactitem">A <span
class="ectt-1000">metadata.xml </span>file, as described in appendix <a
href="#x1-162000A">A<!--tex4ht:ref: sec:metadata-xml --></a>. Optional only for legacy support.
</li>
<li class="compactitem">A <span
class="ectt-1000">ChangeLog</span>, in a format determined by the provider of the respository. Optional.
</li>
<li class="compactitem">A <span
class="ectt-1000">Manifest </span>file, whose format is described in <span class="cite">[<a
href="#XGlep44">1</a>]</span>.
</li>
<li class="compactitem">A <span
class="ectt-1000">files </span>directory, containing any support files needed by the ebuilds. Optional.</li></ul>
<!--l. 60--><p class="noindent" >Any ebuild in a package directory must be named <span
class="ectt-1000">name-ver.suffix</span>, where:
</p><!--l. 63--><p class="noindent" >
</p><ul>
<li class="compactitem"><span
class="ectt-1000">name </span>is the (unqualified) package name.
</li>
<li class="compactitem"><span
class="ectt-1000">ver </span>is the package’s version.
</li>
<li class="compactitem"> <span
class="ectt-1000">suffix </span>is <span
class="ectt-1000">ebuild</span>.</li></ul>
<!--l. 68--><p class="noindent" >Package managers must ignore any ebuild file that does not match these rules.
</p><!--l. 70--><p class="noindent" >A package directory that contains no correctly named ebuilds shall be considered a package with
no versions. A package with no versions shall be considered equivalent to a package that does not
exist (and by extension, a package manager may treat a package that does not exist as a package
with no versions).
</p><!--l. 75--><p class="noindent" >A package directory may contain other files or directories, whose purpose is not covered by this
specification.
</p><!--l. 78--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">4.4 </span> <a
id="x1-340004.4"></a>The Profiles Directory</h3>
<!--l. 81--><p class="noindent" >The profiles directory shall contain zero or more profile directories as described in section <a
href="#x1-430005">5<!--tex4ht:ref: sec:profiles --></a>, as
well as the following files and directories. In any line-based file, lines beginning with a # character
are treated as comments, whilst blank lines are ignored. All contents of this directory, with the
exception of <span
class="ectt-1000">repo_name</span>, are optional.
</p><!--l. 88--><p class="noindent" >The profiles directory may contain an <span
class="ectt-1000">eapi </span>file. This file, if it exists, must contain a single line
with the name of an EAPI. This specifies the EAPI to use when handling the profiles
directory; a package manager must not attempt to use any repository whose profile
directory requires an EAPI it does not support. If no <span
class="ectt-1000">eapi </span>file is present, EAPI 0 shall be
used.
</p><!--l. 93--><p class="noindent" >If the repository is not intended to be stand-alone, the contents of these files are to be taken from
or merged with the master repository as necessary.
</p><!--l. 96--><p class="noindent" >Other files not described by this specification may exist, but may not be relied upon. The package
manager must ignore any files in this directory that it does not recognise.
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">arch.list</span> </dt><dd
class="description"> Contains a list, one entry per line, of permissible values for the <span
class="ectt-1000">ARCH </span>variable,
and hence permissible keywords for packages in this repository.
</dd><dt class="description">
<span
class="ecbx-1000">categories</span> </dt><dd
class="description"> Contains a list, one entry per line, of categories provided by this repository.
</dd><dt class="description">
<span
class="ecbx-1000">eapi</span> </dt><dd
class="description">See above.
</dd><dt class="description">
<span
class="ecbx-1000">info_pkgs</span> </dt><dd
class="description">Contains a list, one entry per line, of qualified package names. Any package
matching one of these is to be listed when a package manager displays a ‘system
information’ listing.
</dd><dt class="description">
<span
class="ecbx-1000">info_vars</span> </dt><dd
class="description">Contains a list, one entry per line, of profile, configuration, and environment
variables which are considered to be of interest. The value of each of these variables
may be shown when the package manager displays a ‘system information’ listing.
</dd><dt class="description">
<span
class="ecbx-1000">package.mask</span> </dt><dd
class="description"> Contains a list, one entry per line, of package dependency specifications
(using the directory’s EAPI). Any package version matching one of these is considered
to be masked, and will not be installed regardless of profile unless it is unmasked by
the user configuration.
</dd><dt class="description">
<span
class="ecbx-1000">profiles.desc</span> </dt><dd
class="description">Described below in section <a
href="#x1-350004.4.1">4.4.1<!--tex4ht:ref: sec:profiles.desc --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">repo_name</span> </dt><dd
class="description">Contains, on a single line, the name of this repository. The repository name
must conform to section <a
href="#x1-250003.1.5">3.1.5<!--tex4ht:ref: sec:repository-names --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">thirdpartymirrors</span> </dt><dd
class="description">Described below in section <a
href="#x1-360004.4.2">4.4.2<!--tex4ht:ref: sec:thirdpartymirrors --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">use.desc</span> </dt><dd
class="description">Contains descriptions of valid global USE flags for this repository. The format is
described in section <a
href="#x1-370004.4.3">4.4.3<!--tex4ht:ref: sec:use.desc --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">use.local.desc</span> </dt><dd
class="description">Contains descriptions of valid local USE flags for this repository, along with
the packages to which they apply. The format is as described in section <a
href="#x1-370004.4.3">4.4.3<!--tex4ht:ref: sec:use.desc --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">desc/</span> </dt><dd
class="description">This directory contains files analogous to <span
class="ectt-1000">use.desc </span>for the various <span
class="ectt-1000">USE_EXPAND</span>
variables. Each file in it is named <span
class="ectt-1000"><varname>.desc</span>, where <span
class="ectt-1000"><varname> </span>is the variable
name, in lowercase, whose possible values the file describes. The format of each file is
as for <span
class="ectt-1000">use.desc</span>, described in section <a
href="#x1-370004.4.3">4.4.3<!--tex4ht:ref: sec:use.desc --></a>. The <span
class="ectt-1000">USE_EXPAND </span>name is <span
class="ecti-1000">not </span>included as
a prefix here.
</dd><dt class="description">
<span
class="ecbx-1000">updates/</span> </dt><dd
class="description">This directory is described in section <a
href="#x1-380004.4.4">4.4.4<!--tex4ht:ref: sec:updates-dir --></a>.</dd></dl>
<!--l. 131--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">4.4.1 </span> <a
id="x1-350004.4.1"></a>The profiles.desc file</h4>
<!--l. 133--><p class="noindent" ><span
class="ectt-1000">profiles.desc </span>is a line-based file, with the standard commenting rules from section <a
href="#x1-340004.4">4.4<!--tex4ht:ref: sec:profiles-dir --></a>,
containing a list of profiles that are valid for use, along with their associated architecture and
status. Each line has the format:
</p>
<div class="verbatim" id="verbatim-1">
<keyword> <profile path> <stability></div>
<!--l. 140--><p class="nopar" >
</p><!--l. 142--><p class="noindent" >Where:
</p><!--l. 145--><p class="noindent" >
</p><ul>
<li class="compactitem"><span
class="ectt-1000"><keyword> </span>is the default keyword for the profile and the <span
class="ectt-1000">ARCH </span>for which the profile is
valid.
</li>
<li class="compactitem"><span
class="ectt-1000"><profile path> </span>is the (relative) path from the <span
class="ectt-1000">profiles </span>directory to the profile in
question.
</li>
<li class="compactitem"><span
class="ectt-1000"><stability> </span>indicates the stability of the profile. This may be useful for QA tools,
which may wish to display warnings with a reduced severity for some profiles. The
values <span
class="ectt-1000">stable </span>and <span
class="ectt-1000">dev </span>are widely used, but repositories may use other values.</li></ul>
<!--l. 154--><p class="noindent" >Fields are whitespace-delimited.
</p><!--l. 156--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">4.4.2 </span> <a
id="x1-360004.4.2"></a>The thirdpartymirrors file</h4>
<!--l. 158--><p class="noindent" ><span
class="ectt-1000">thirdpartymirrors </span>is another simple line-based file, describing the valid mirrors for use with
<span
class="ectt-1000">mirror:// </span>URIs in this repository, and the associated download locations. The format of each line
is:
</p>
<div class="verbatim" id="verbatim-2">
<mirror name> <mirror 1> <mirror 2> ... <mirror n></div>
<!--l. 163--><p class="nopar" >Fields are whitespace-delimited. When parsing a URI of the form <span
class="ectt-1000">mirror://name/path/filename</span>,
where the <span
class="ectt-1000">path/ </span>part is optional, the <span
class="ectt-1000">thirdpartymirrors </span>file is searched for a line whose first field
is <span
class="ectt-1000">name</span>. Then the download URIs in the subsequent fields have <span
class="ectt-1000">path/filename </span>appended to them
to generate the URIs from which a download is attempted.
</p><!--l. 169--><p class="noindent" >Each mirror name may appear at most once in a file. Behaviour when a mirror name appears
multiple times is undefined. Behaviour when a mirror is defined in terms of another mirror is
undefined. A package manager may choose to fetch from all of or a subset of the listed mirrors, and
may use an order other than the one described.
</p><!--l. 174--><p class="noindent" >The mirror with the name equal to the repository’s name (and if the repository has a master, the
master’s name) may be consulted for all downloads.
</p><!--l. 177--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">4.4.3 </span> <a
id="x1-370004.4.3"></a>use.desc and related files</h4>
<!--l. 179--><p class="noindent" ><span
class="ectt-1000">use.desc </span>contains descriptions of every valid global USE flag for this repository. It is a
line-based file with the standard rules for comments and blank lines. The format of each line
is:
</p>
<div class="verbatim" id="verbatim-3">
<flagname> - <description></div>
<!--l. 183--><p class="nopar" >
</p><!--l. 185--><p class="noindent" ><span
class="ectt-1000">use.local.desc </span>contains descriptions of every valid local USE flag—those that apply only to a
small number of packages, or that have different meanings for different packages. Its format
is:
</p>
<div class="verbatim" id="verbatim-4">
<category/package>:<flagname> - <description></div>
<!--l. 189--><p class="nopar" >Flags must be listed once for each package to which they apply, or if a flag is listed in both
<span
class="ectt-1000">use.desc </span>and <span
class="ectt-1000">use.local.desc</span>, it must be listed once for each package for which its meaning
differs from that described in <span
class="ectt-1000">use.desc</span>.
</p><!--l. 194--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">4.4.4 </span> <a
id="x1-380004.4.4"></a>The updates directory</h4>
<!--l. 196--><p class="noindent" >The <span
class="ectt-1000">updates </span>directory is used to inform the package manager that a package has moved
categories, names, or that a version has changed SLOT. It contains one file per quarter year,
named <span
class="ectt-1000">[1-4]Q-[YYYY] </span>for the first to fourth quarter of a given year, for example <span
class="ectt-1000">1Q-2004 </span>or
<span
class="ectt-1000">3Q-2006</span>. The format of each file is again line-based, with each line having one of the following
formats:
</p>
<div class="verbatim" id="verbatim-5">
move <qpn1> <qpn2>
 <br />slotmove <spec> <slot1> <slot2></div>
<!--l. 204--><p class="nopar" >The first form, where <span
class="ectt-1000">qpn1 </span>and <span
class="ectt-1000">qpn2 </span>are <span
class="ecti-1000">qualified package names</span>, instructs the package
manager that the package <span
class="ectt-1000">qpn1 </span>has changed name, category, or both, and is now called
<span
class="ectt-1000">qpn2</span>.
</p><!--l. 208--><p class="noindent" >The second form instructs the package manager that any currently installed package version
matching package dependency specification <span
class="ectt-1000">spec </span>whose <span
class="ectt-1000">SLOT </span>is set to <span
class="ectt-1000">slot1 </span>should have it
updated to <span
class="ectt-1000">slot2</span>.
</p><!--l. 212--><p class="noindent" >Any name that has appeared as the origin of a move must not be reused in the future. Any slot
that has appeared as the origin of a slot move may not be used by packages matching the spec of
that slot move in the future.
</p><!--l. 216--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">4.5 </span> <a
id="x1-390004.5"></a>The Licenses Directory</h3>
<!--l. 219--><p class="noindent" >The <span
class="ectt-1000">licenses </span>directory shall contain copies of the licenses used by packages in the repository.
Each file will be named according to the name used in the <span
class="ectt-1000">LICENSE </span>variable as described in
section <a
href="#x1-690008.2">8.2<!--tex4ht:ref: ebuild-var-LICENSE --></a>, and will contain the complete text of the license in human-readable form. Plain text
format is strongly preferred but not required.
</p><!--l. 224--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">4.6 </span> <a
id="x1-400004.6"></a>The Eclass Directory</h3>
<!--l. 227--><p class="noindent" >The <span
class="ectt-1000">eclass </span>directory shall contain copies of the eclasses provided by this repository. The format of
these files is described in section <a
href="#x1-11200011">11<!--tex4ht:ref: sec:eclasses --></a>. It may also contain, in their own directory, support files
needed by these eclasses.
</p><!--l. 231--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">4.7 </span> <a
id="x1-410004.7"></a>The Metadata Directory</h3>
<!--l. 234--><p class="noindent" >The <span
class="ectt-1000">metadata </span>directory contains various repository-level metadata that is not contained in
<span
class="ectt-1000">profiles/</span>. All contents are optional. In this standard only the <span
class="ectt-1000">cache </span>subdirectory is described;
other contents are optional but may include security advisories, DTD files for the various XML
files used in the repository, and repository timestamps.
</p><!--l. 239--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">4.7.1 </span> <a
id="x1-420004.7.1"></a>The metadata cache</h4>
<!--l. 241--><p class="noindent" >The <span
class="ectt-1000">metadata/cache </span>directory may contain a cached form of all important ebuild metadata
variables. The contents of this directory are described in section <a
href="#x1-15800014">14<!--tex4ht:ref: metadata-cache --></a>.
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter 5</span><br /><a
id="x1-430005"></a>Profiles</h2>
<h3 class="sectionHead"><span class="titlemark">5.1 </span> <a
id="x1-440005.1"></a>General principles</h3>
<!--l. 5--><p class="noindent" >Generally, a profile defines information specific to a certain ‘type’ of system—it lies somewhere
between repository-level defaults and user configuration in that the information it contains is not
necessarily applicable to all machines, but is sufficiently general that it should not be left to the
user to configure it. Some parts of the profile can be overridden by user configuration, some only by
another profile.
</p><!--l. 11--><p class="noindent" >The format of a profile is relatively simple. Each profile is a directory containing any number of the
files described in this chapter, and possibly inheriting another profile. The files themselves
follow a few basic conventions as regards inheritance and format; these are described in
the next section. It may also contain any number of subdirectories containing other
profiles.
</p><!--l. 16--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">5.2 </span> <a
id="x1-450005.2"></a>Files that make up a profile</h3>
<!--l. 18--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.1 </span> <a
id="x1-460005.2.1"></a>The parent file</h4>
<!--l. 19--><p class="noindent" >A profile may contain a <span
class="ectt-1000">parent </span>file. Each line must contain a relative path to another profile which
will be considered as one of this profile’s parents. Any settings from the parent are inherited by
this profile, and can be overridden by it. Precise rules for how settings are combined with the
parent profile vary between files, and are described below. Parents are handled depth
first, left to right, with duplicate parent paths being sourced for every time they are
encountered.
</p><!--l. 25--><p class="noindent" >It is illegal for a profile’s parent tree to contain cycles. Package manager behaviour upon
encountering a cycle is undefined.
</p><!--l. 28--><p class="noindent" >This file must not contain comments, blank lines or make use of line continuations.
</p><!--l. 30--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.2 </span> <a
id="x1-470005.2.2"></a>The eapi file</h4>
<!--l. 32--><p class="noindent" >A profile directory may contain an <span
class="ectt-1000">eapi </span>file. This file, if it exists, must contain a single line with
the name of an EAPI. This specifies the EAPI to use when handling the directory in question; a
package manager must not attempt to use any profile using a directory which requires an EAPI it
does not support. If no <span
class="ectt-1000">eapi </span>file is present, EAPI 0 shall be used. The EAPI is not inherited via
the <span
class="ectt-1000">parent </span>file.
</p><!--l. 38--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.3 </span> <a
id="x1-480005.2.3"></a>deprecated</h4>
<!--l. 39--><p class="noindent" >If a profile contains a file named <span
class="ectt-1000">deprecated</span>, it is treated as such. The first line of this file
should contain the path from the <span
class="ectt-1000">profiles </span>directory of the repository to a valid profile
that is the recommended upgrade path from this profile. The remainder of the file can
contain any text, which may be displayed to users using this profile by the package
manager. This file is not inherited—profiles which inherit from a deprecated profile are <span
class="ecti-1000">not</span>
deprecated.
</p><!--l. 45--><p class="noindent" >This file must not contain comments or make use of line continuations.
</p><!--l. 47--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.4 </span> <a
id="x1-490005.2.4"></a>make.defaults</h4>
<!--l. 48--><p class="noindent" ><span
class="ectt-1000">make.defaults </span>is used to define defaults for various environment and configuration variables. This
file is unusual in that it is not combined at a file level with the parent—instead, each variable is
combined or overridden individually as described in section <a
href="#x1-590005.3">5.3<!--tex4ht:ref: sec:profile-variables --></a>.
</p><!--l. 52--><p class="noindent" >The file itself is a line-based key-value format. Each line contains a single <span class="obeylines-h"><span class="verb"><span
class="ectt-1000">VAR="value"</span></span></span> entry,
where the value must be double quoted. A variable name must start with one of <span
class="ectt-1000">a-zA-Z </span>and may
contain <span
class="ectt-1000">a-zA-Z0-9_ </span>only. Additional syntax, which is a small subset of bash syntax, is allowed as
follows:
</p><!--l. 58--><p class="noindent" >
</p><ul>
<li class="compactitem">Variables to the right of the equals sign in the form <span
class="ectt-1000">${foo} </span>or <span
class="ectt-1000">$foo </span>are recognised and
expanded from variables previously set in this or earlier <span
class="ectt-1000">make.defaults </span>files.
</li>
<li class="compactitem">One logical line may be continued over multiple physical lines by escaping the newline
with a backslash. A quoted string may also continue over multiple physical lines in
this fashion, so that the quoted string can begin, continue, and end on two or more
separate lines.
</li>
<li class="compactitem">Backslashes, except for line continuations, are not allowed.</li></ul>
<!--l. 66--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.5 </span> <a
id="x1-500005.2.5"></a>virtuals</h4>
<!--l. 68--><p class="noindent" >The <span
class="ectt-1000">virtuals </span>file defines default providers for “old-style” virtual packages. It is a simple line-based
file, with each line containing two whitespace-delimited tokens. The first is a virtual package name
(for example, <span
class="ectt-1000">virtual/alsa</span>) and the second is a qualified package name. Blank lines and those
beginning with a # character are ignored. When attempting to resolve a virtual name to a concrete
package, the specification defined in the active profile’s <span
class="ectt-1000">virtuals </span>list should be used if no provider
is already installed.
</p><!--l. 75--><p class="noindent" >The <span
class="ectt-1000">virtuals </span>file is inherited in the simplest manner: all entries from the parent profile are
loaded, then entries from the current profile. If a virtual package name appears in both, the entry
in the parent profile is discarded.
</p><!--l. 79--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.6 </span> <a
id="x1-510005.2.6"></a>Simple line-based files</h4>
<!--l. 81--><p class="noindent" >These files are a simple one-item-per-line list, which is inherited in the following manner: the
parent profile’s list is taken, and the current profile’s list appended. If any line begins with a
hyphen, then any lines previous to it whose contents are equal to the remainder of that line
are removed from the list. Once again, blank lines and those beginning with a # are
discarded.
</p><!--l. 86--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.7 </span> <a
id="x1-520005.2.7"></a>packages</h4>
<!--l. 87--><p class="noindent" >The <span
class="ectt-1000">packages </span>file is used to define the ‘system set’ for this profile. After the above rules for
inheritance and comments are applied, its lines must take one of two forms: a package dependency
specification prefixed by <span
class="ectt-1000">* </span>denotes that the atom forms part of the system set. A package
dependency specification on its own may also appear for legacy reasons, but should be ignored
when calculating the system set.
</p><!--l. 93--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.8 </span> <a
id="x1-530005.2.8"></a>packages.build</h4>
<!--l. 94--><p class="noindent" >The <span
class="ectt-1000">packages.build </span>file is used by Gentoo’s Catalyst tool to generate stage1 tarballs, and has no
relevance to the operation of a package manager. It is thus outside the scope of this document, but
is mentioned here for completeness.
</p><!--l. 98--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.9 </span> <a
id="x1-540005.2.9"></a>package.mask</h4>
<!--l. 99--><p class="noindent" ><span
class="ectt-1000">package.mask </span>is used to prevent packages from being installed on a given profile. Each line
contains one package dependency specification; anything matching this specification will not be
installed unless unmasked by the user’s configuration.
</p><!--l. 103--><p class="noindent" >Note that the <span
class="ectt-1000">-spec </span>syntax can be used to remove a mask in a parent profile, but not necessarily a
global mask (from <span
class="ectt-1000">profiles/package.mask</span>, section <a
href="#x1-340004.4">4.4<!--tex4ht:ref: profiles-package.mask --></a>).
</p>
<!--l. 106--><p class="noindent" ><span class="paragraphHead"><a
id="x1-550005.2.9"></a><span
class="ecbx-1000">Note:</span></span>
Portage currently treats <span
class="ectt-1000">profiles/package.mask </span>as being on the leftmost branch of the inherit
tree when it comes to <span
class="ectt-1000">-lines</span>. This behaviour may not be relied upon.
</p><!--l. 109--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.10 </span> <a
id="x1-560005.2.10"></a>package.provided</h4>
<!--l. 110--><p class="noindent" ><span
class="ectt-1000">package.provided </span>is used to tell the package manager that a certain package version should be
considered to be provided by the system regardless of whether it is actually installed.
Because it has severe adverse effects on USE-based and slot-based dependencies, its
use is strongly deprecated and package manager support must be regarded as purely
optional.
</p><!--l. 115--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.11 </span> <a
id="x1-570005.2.11"></a>package.use</h4>
<!--l. 116--><p class="noindent" >The <span
class="ectt-1000">package.use </span>file may be used by the package manager to override the default USE flags
specified by <span
class="ectt-1000">make.defaults </span>on a per package basis. The format is to have a package
dependency specification, and then a space delimited list of USE flags to enable. A USE flag
in the form of <span
class="ectt-1000">-flag </span>indicates that the package should have the USE flag disabled.
The package dependency specification is limited to the forms defined by the directory’s
EAPI.
</p><!--l. 122--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.12 </span> <a
id="x1-580005.2.12"></a>USE masking and forcing</h4>
<!--l. 124--><p class="noindent" >This section covers the four files <span
class="ectt-1000">use.mask</span>, <span
class="ectt-1000">use.force</span>, <span
class="ectt-1000">package.use.mask </span>and
<span
class="ectt-1000">package.use.force</span>. They are described together because they interact in a non-trivial
manner.
</p><!--l. 127--><p class="noindent" >Simply speaking, <span
class="ectt-1000">use.mask </span>and <span
class="ectt-1000">use.force </span>are used to say that a given USE flag must
never or always, respectively, be enabled when using this profile. <span
class="ectt-1000">package.use.mask </span>and
<span
class="ectt-1000">package.use.force </span>do the same thing on a per-package, or per-version, basis. The precise manner
in which they interact is less simple, and is best described in terms of the algorithm used to
determine whether a flag is masked for a given package version. This is described in Algorithm <a
href="#x1-58001r8">8<!--tex4ht:ref: alg:use-masking --></a>.
</p><div class="algorithm">
<!--l. 133--><p class="noindent" ><a
id="x1-58001r8"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Algorithm 8: </span><span
class="content">USE masking logic</span></div><!--tex4ht:label?: x1-58001r8 -->
<div class="algorithmic">
<a
id="x1-58002r84"></a>
<span class="ALCitem"><span class="ecrm-0800"> 1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> let masked = false <a
id="x1-58003r85"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">for</span> each profile in the inheritance tree, depth first <span
class="ecbx-1000">do</span><span class="for-body">
<a
id="x1-58004r86"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">if</span> <span
class="ectt-1000">use.mask </span>contains <span
class="ecti-1000">flag</span> <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-58005r87"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;"> </span> let masked = true
</span><a
id="x1-58006r88"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">else</span> <span
class="ecbx-1000">if</span> <span
class="ectt-1000">use.mask </span>contains <span
class="ecti-1000">-flag</span> <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-58007r89"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;"> </span> let masked = false
</span><a
id="x1-58008r90"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span><a
id="x1-58009r91"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 8:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">for</span> each <span
class="cmmi-10">line </span>in package.use.mask, in order, for which the spec matches <span
class="cmmi-10">package</span> <span
class="ecbx-1000">do</span><span class="for-body">
<a
id="x1-58010r92"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 9:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;"> </span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">line </span>contains <span
class="ecti-1000">flag</span> <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-58011r93"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">10:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:34.99146pt;"> </span> let masked = true
</span><a
id="x1-58012r94"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">11:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;"> </span> <span
class="ecbx-1000">else</span> <span
class="ecbx-1000">if</span> <span
class="cmmi-10">line </span>contains <span
class="ecti-1000">-flag</span> <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-58013r95"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">12:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:34.99146pt;"> </span> let masked = false
</span><a
id="x1-58014r96"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">13:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span>
</span><a
id="x1-58015r97"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">14:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">for</span>
</span><a
id="x1-58016r98"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">15:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">for</span>
</div>
</div><hr class="endfloat" />
</div>
<!--l. 153--><p class="noindent" >The logic for <span
class="ectt-1000">use.force </span>and <span
class="ectt-1000">package.use.force </span>is identical. If a flag is both masked and forced,
the mask is considered to take precedence.
</p><!--l. 156--><p class="noindent" ><span
class="ectt-1000">USE_EXPAND </span>values may be forced or masked by using <span
class="ectt-1000">expand_name_value</span>.
</p><!--l. 158--><p class="noindent" >A package manager may treat <span
class="ectt-1000">ARCH </span>values that are not the current architecture as being
masked.
</p>
<h3 class="sectionHead"><span class="titlemark">5.3 </span> <a
id="x1-590005.3"></a>Profile variables</h3>
<!--l. 4--><p class="noindent" >This section documents variables that have special meaning, or special behaviour, when defined in
a profile’s <span
class="ectt-1000">make.defaults </span>file.
</p><!--l. 7--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.3.1 </span> <a
id="x1-600005.3.1"></a>Incremental Variables</h4>
<!--l. 8--><p class="noindent" ><span
class="ecti-1000">Incremental </span>variables must stack between parent and child profiles in the following manner:
Beginning with the highest parent profile, tokenise the variable’s value based on whitespace and
concatenate the lists. Then, for any token <span
class="cmmi-10">T </span>beginning with a hyphen, remove it and any previous
tokens whose value is equal to <span
class="cmmi-10">T </span>with the hyphen removed, or, if <span
class="cmmi-10">T </span>is equal to <span
class="ectt-1000">-*</span>, remove all
previous values. Note that because of this treatment, the order of tokens in the final result is
arbitrary, not necessarily related to the order of tokens in any given profile. The following variables
must be treated in this fashion:
</p><ul>
<li class="compactitem"><span
class="ectt-1000">USE</span>
</li>
<li class="compactitem"><span
class="ectt-1000">USE_EXPAND</span>
</li>
<li class="compactitem"><span
class="ectt-1000">USE_EXPAND_HIDDEN</span>
</li>
<li class="compactitem"><span
class="ectt-1000">CONFIG_PROTECT</span>
</li>
<li class="compactitem"><span
class="ectt-1000">CONFIG_PROTECT_MASK</span></li></ul>
<!--l. 23--><p class="noindent" >If the package manager supports any EAPI listed in table <a
href="#x1-60001r1">5.1<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as using profile-defined <span
class="ectt-1000">IUSE</span>
injection, the following variables must also be treated incrementally; otherwise, the following
variables may or may not be treated incrementally:
</p><ul>
<li class="compactitem"><span
class="ectt-1000">IUSE_IMPLICIT</span>
</li>
<li class="compactitem"><span
class="ectt-1000">USE_EXPAND_IMPLICIT</span>
</li>
<li class="compactitem"><span
class="ectt-1000">USE_EXPAND_UNPREFIXED</span></li></ul>
<!--l. 32--><p class="noindent" >Other variables, except where they affect only package-manager-specific functionality (such as
Portage’s <span
class="ectt-1000">FEATURES </span>variable), must not be treated incrementally—later definitions shall completely
override those in parent profiles.
</p>
<div class="table">
<!--l. 36--><p class="noindent" ><a
id="x1-60001r1"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 5.1: </span><span
class="content">Profile-defined <span
class="ectt-1000">IUSE </span>injection for EAPIs</span></div><!--tex4ht:label?: x1-60001r1 -->
<div class="tabular">
<table id="TBL-2" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-2-1g"><col
id="TBL-2-1" /><col
id="TBL-2-2" /><col
id="TBL-2-3" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-2-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-2-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-2-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports profile-defined </span><span
class="ectt-1000">IUSE </span><span
class="ecbx-1000">injection?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-2-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-2-2-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-2-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-2-3-2"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-2-4-2"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-2-5-2"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-2-6-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">5.3.2 </span> <a
id="x1-610005.3.2"></a>Specific variables and their meanings</h4>
<!--l. 52--><p class="noindent" >The following variables have specific meanings when set in profiles.
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">ARCH</span> </dt><dd
class="description">The system’s architecture. Must be a value listed in <span
class="ectt-1000">profiles/arch.list</span>; see
section <a
href="#x1-340004.4">4.4<!--tex4ht:ref: arch.list --></a> for more information. Must be equal to the primary <span
class="ectt-1000">KEYWORD </span>for this profile.
</dd><dt class="description">
<span
class="ecbx-1000">CONFIG_PROTECT, CONFIG_PROTECT_MASK</span> </dt><dd
class="description">Contain
whitespace-delimited lists used to control the configuration file protection. Described
more fully in chapter <a
href="#x1-15300013.3.3">13.3.3<!--tex4ht:ref: sec:config-protect --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">USE</span> </dt><dd
class="description">Defines the list of default USE flags for this profile. Flags may be added or removed
by the user’s configuration. <span
class="ectt-1000">USE_EXPAND </span>values must not be specified in this way.
</dd><dt class="description">
<span
class="ecbx-1000">USE_EXPAND</span> </dt><dd
class="description">Defines a list of variables which are to be treated incrementally and
whose contents are to be expanded into the USE variable as passed to ebuilds. See
section <a
href="#x1-11800012.1.1">12.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a> for details.
</dd><dt class="description">
<span
class="ecbx-1000">USE_EXPAND_UNPREFIXED</span> </dt><dd
class="description">Similar to <span
class="ectt-1000">USE_EXPAND</span>, but no prefix is used. If
the repository contains any package using an EAPI supporting profile-defined <span
class="ectt-1000">IUSE</span>
injection (see table <a
href="#x1-60001r1">5.1<!--tex4ht:ref: tab:profile-iuse-injection-table --></a>), this list must contain at least <span
class="ectt-1000">ARCH</span>. See section <a
href="#x1-11800012.1.1">12.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a> for
details.
</dd><dt class="description">
<span
class="ecbx-1000">USE_EXPAND_HIDDEN</span> </dt><dd
class="description">Contains a (possibly empty) subset of names from
<span
class="ectt-1000">USE_EXPAND </span>and <span
class="ectt-1000">USE_EXPAND_UNPREFIXED</span>. The package manager may use this set as
a hint to avoid displaying uninteresting or unhelpful information to an end user.
</dd><dt class="description">
<span
class="ecbx-1000">USE_EXPAND_IMPLICIT, IUSE_IMPLICIT</span> </dt><dd
class="description">Used to inject implicit values into
<span
class="ectt-1000">IUSE</span>. See section <a
href="#x1-11800012.1.1">12.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a> for details.</dd></dl>
<!--l. 75--><p class="noindent" >In addition, for EAPIs listed in table <a
href="#x1-60001r1">5.1<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as supporting profile defined <span
class="ectt-1000">IUSE </span>injection, the variables
named in <span
class="ectt-1000">USE_EXPAND </span>and <span
class="ectt-1000">USE_EXPAND_UNPREFIXED </span>have special handling as described in
section <a
href="#x1-11800012.1.1">12.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a>.
</p><!--l. 79--><p class="noindent" >Any other variables set in <span
class="ectt-1000">make.defaults </span>must be passed on into the ebuild environment as-is,
and are not required to be interpreted by the package manager.
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter 6</span><br /><a
id="x1-620006"></a>Old-Style Virtual Packages</h2>
<!--l. 4--><p class="noindent" >Old-style virtuals are pseudo-packages—they can be depended upon or installed, but do not exist
in the ebuild repository. An old-style virtual requires several things in the repository: at least one
ebuild must list the virtual in its <span
class="ectt-1000">PROVIDE </span>variable, and there must be at least one entry in a
profiles <span
class="ectt-1000">virtuals </span>file listing the default provider for each profile—see sections <a
href="#x1-700008.3">8.3<!--tex4ht:ref: ebuild-var-provide --></a> and <a
href="#x1-500005.2.5">5.2.5<!--tex4ht:ref: sec:profiles-virtuals --></a> for
specifics on these two. Old-style virtuals require special handling as regards dependencies; this is
described below.
</p><!--l. 14--><p class="noindent" >All old-style virtuals must use the category <span
class="ectt-1000">virtual</span>. Not all packages using the <span
class="ectt-1000">virtual </span>category
may be assumed to be old style virtuals.
</p>
<!--l. 17--><p class="noindent" ><span class="paragraphHead"><a
id="x1-630006"></a><span
class="ecbx-1000">Note:</span></span>
A <span
class="ecti-1000">new-style </span>virtual is simply an ebuild which install no files and use its dependency strings to
select providers. By convention, and to ease migration, these are also placed in the <span
class="ectt-1000">virtual</span>
category.
</p><!--l. 21--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">6.1 </span> <a
id="x1-640006.1"></a>Dependencies on virtual packages</h3>
<!--l. 23--><p class="noindent" >When a dependency on a virtual package is encountered, it must be resolved into a real package
before it can be satisfied. There are two factors that affect this process: whether a package
providing the virtual is installed, and the <span
class="ectt-1000">virtuals </span>file in the active profile (section <a
href="#x1-500005.2.5">5.2.5<!--tex4ht:ref: sec:profiles-virtuals --></a>). If a
package is already installed which satisfies the virtual requirement (via <span
class="ectt-1000">PROVIDE</span>), then it should be
used to satisfy the dependency. Otherwise, the profiles <span
class="ectt-1000">virtuals </span>file (section <a
href="#x1-500005.2.5">5.2.5<!--tex4ht:ref: sec:profiles-virtuals --></a>) should be
consulted to choose an appropriate provider.
</p><!--l. 33--><p class="noindent" >Dependencies on old style virtuals must not use any kind of version restriction.
</p><!--l. 35--><p class="noindent" >Blocks on provided virtuals have special behaviour documented in section <a
href="#x1-850009.2.4">9.2.4<!--tex4ht:ref: provided-blocks --></a>.
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter 7</span><br /><a
id="x1-650007"></a>Ebuild File Format</h2>
<!--l. 4--><p class="noindent" >The ebuild file format is in its basic form a subset of the format of a bash script. The interpreter is
assumed to be GNU bash, version 3.2 or later, see footnote <a
href="#x1-125001f6">6<!--tex4ht:ref: fn:bash3.2 --></a> on page <a
href="#x1-125001f6">172<!--tex4ht:ref: fn:bash3.2 --></a>. The file encoding must
be UTF-8 with Unix-style newlines. When sourced, the ebuild must define certain variables and
functions (see sections <a
href="#x1-660008">8<!--tex4ht:ref: sec:ebuild-vars --></a> and <a
href="#x1-9200010">10<!--tex4ht:ref: sec:ebuild-functions --></a> for specific information), and must not call any external programs,
write anything to standard output or standard error, or modify the state of the system in any
way.
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter 8</span><br /><a
id="x1-660008"></a>Ebuild-defined Variables</h2>
<!--l. 4--><p class="noindent" ><span class="paragraphHead"><a
id="x1-670008"></a><span
class="ecbx-1000">Note:</span></span>
This section describes variables that may or must be defined by ebuilds. For variables that are
passed from the package manager to the ebuild, see section <a
href="#x1-11700012.1">12.1<!--tex4ht:ref: sec:ebuild-env-vars --></a>.
</p><!--l. 7--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">8.1 </span> <a
id="x1-680008.1"></a>Metadata invariance</h3>
<!--l. 10--><p class="noindent" >All ebuild-defined variables discussed in this chapter must be defined independently of any system,
profile or tree dependent data, and must not vary depending upon the ebuild phase. In particular,
ebuild metadata can and will be generated on a different system from that upon which the
ebuild will be used, and the ebuild must generate identical metadata every time it is
used.
</p><!--l. 16--><p class="noindent" >Globally defined ebuild variables without a special meaning must similarly not rely upon variable
data.
</p><!--l. 19--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">8.2 </span> <a
id="x1-690008.2"></a>Mandatory Ebuild-defined Variables</h3>
<!--l. 21--><p class="noindent" >All ebuilds must define at least the following variables:
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">DESCRIPTION</span> </dt><dd
class="description">A short human-readable description of the package’s purpose. May be
defined by an eclass. Must not be empty.
</dd><dt class="description">
<span
class="ecbx-1000">HOMEPAGE</span> </dt><dd
class="description">The URI or URIs for a package’s homepage, including protocols. May be
defined by an eclass. See section <a
href="#x1-760009">9<!--tex4ht:ref: sec:dependencies --></a> for full syntax.
</dd><dt class="description">
<span
class="ecbx-1000">IUSE</span> </dt><dd
class="description">The <span
class="ectt-1000">USE </span>flags used by the ebuild. Any eclass that works with <span
class="ectt-1000">USE </span>flags must also set
<span
class="ectt-1000">IUSE</span>, listing only the variables used by that eclass. The package manager is responsible
for merging these values. See section <a
href="#x1-11800012.1.1">12.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a> for discussion on which values must be
listed this variable.
<!--l. 33--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">I</span><span
class="small-caps">U</span><span
class="small-caps">S</span><span
class="small-caps">E</span>-<span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">F</span><span
class="small-caps">A</span><span
class="small-caps">U</span><span
class="small-caps">L</span><span
class="small-caps">T</span><span
class="small-caps">S</span></span></span></p><!--l. 33--><p class="noindent" >In EAPIs shown in table <a
href="#x1-69001r1">8.1<!--tex4ht:ref: tab:iuse-defaults-table --></a> as supporting <span
class="ectt-1000">IUSE </span>defaults, any use flag name in <span
class="ectt-1000">IUSE</span>
may be prefixed by at most one of a plus or a minus sign. If such a prefix is present,
the package manager may use it as a suggestion as to the default value of the use flag
if no other configuration overrides it.
</p></dd><dt class="description">
<span
class="ecbx-1000">KEYWORDS</span> </dt><dd
class="description">A whitespace separated list of keywords for the ebuild. Each token must be
a valid keyword name, as per section <a
href="#x1-260003.1.6">3.1.6<!--tex4ht:ref: sec:keyword-names --></a>. May include <span
class="ectt-1000">-*</span>, which indicates that the
package will only work on explicitly listed archs. May include <span
class="ectt-1000">-arch</span>, which indicates
that the package will not work on the specified arch. May be empty, which indicates
uncertain functionality on any architecture. May be defined in an eclass.
</dd><dt class="description">
<span
class="ecbx-1000">LICENSE</span> </dt><dd
class="description">The package’s license. Each text token must correspond to a tree “licenses/”
entry (see section <a
href="#x1-390004.5">4.5<!--tex4ht:ref: sec:licenses-dir --></a>). See section <a
href="#x1-760009">9<!--tex4ht:ref: sec:dependencies --></a> for full syntax. May be defined by an eclass.
</dd><dt class="description">
<span
class="ecbx-1000">SLOT</span> </dt><dd
class="description">The package’s slot. Must be a valid slot name, as per section <a
href="#x1-220003.1.3">3.1.3<!--tex4ht:ref: sec:slot-names --></a>. May be defined
by an eclass. Must not be empty.
</dd><dt class="description">
<span
class="ecbx-1000">SRC_URI</span> </dt><dd
class="description">A list of source URIs for the package. Valid protocols are <span
class="ectt-1000">http://</span>, <span
class="ectt-1000">https://</span>,
<span
class="ectt-1000">ftp:// </span>and <span
class="ectt-1000">mirror:// </span>(see section <a
href="#x1-360004.4.2">4.4.2<!--tex4ht:ref: sec:thirdpartymirrors --></a> for mirror behaviour). Fetch restricted
packages may include URL parts consisting of just a filename. See section <a
href="#x1-760009">9<!--tex4ht:ref: sec:dependencies --></a> for full
syntax.</dd></dl>
<!--l. 53--><p class="noindent" >If any of these variables are undefined, or if any of these variables are set to invalid values, the
package manager’s behaviour is undefined; ideally, an error in one ebuild should not prevent
operations upon other ebuilds or packages.
</p>
<div class="table">
<!--l. 57--><p class="noindent" ><a
id="x1-69001r1"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 8.1: </span><span
class="content">EAPIs supporting <span
class="ectt-1000">IUSE </span>defaults</span></div><!--tex4ht:label?: x1-69001r1 -->
<div class="tabular">
<table id="TBL-3" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-3-1g"><col
id="TBL-3-1" /><col
id="TBL-3-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-3-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-3-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-3-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports </span><span
class="ectt-1000">IUSE </span><span
class="ecbx-1000">defaults?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-3-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-3-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-3-2-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-3-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-3-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-3-3-2"
class="td11">Yes</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-3-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-3-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-3-4-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-3-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-3-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-3-5-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-3-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-3-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-3-6-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-3-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-3-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h3 class="sectionHead"><span class="titlemark">8.3 </span> <a
id="x1-700008.3"></a>Optional Ebuild-defined Variables</h3>
<!--l. 74--><p class="noindent" >Ebuilds may define any of the following variables:
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">DEPEND</span> </dt><dd
class="description">See section <a
href="#x1-760009">9<!--tex4ht:ref: sec:dependencies --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">EAPI</span> </dt><dd
class="description">The EAPI. See below for defaults.
</dd><dt class="description">
<span
class="ecbx-1000">PDEPEND</span> </dt><dd
class="description">See section <a
href="#x1-760009">9<!--tex4ht:ref: sec:dependencies --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">PROVIDE</span> </dt><dd
class="description">Zero or more qualified package names of any <span
class="ecti-1000">old style </span>virtuals provided by this
package. See section <a
href="#x1-760009">9<!--tex4ht:ref: sec:dependencies --></a> for full syntax.
</dd><dt class="description">
<span
class="ecbx-1000">RDEPEND</span> </dt><dd
class="description">See section <a
href="#x1-760009">9<!--tex4ht:ref: sec:dependencies --></a>. For some EAPIs, <span
class="ectt-1000">RDEPEND </span>has special behaviour for its value if
unset and when used with an eclass. See section <a
href="#x1-720008.3.2">8.3.2<!--tex4ht:ref: sec:rdepend-depend --></a> for details.
</dd><dt class="description">
<span
class="ecbx-1000">RESTRICT</span> </dt><dd
class="description">Zero or more behaviour restrictions for this package. See section <a
href="#x1-890009.2.5">9.2.5<!--tex4ht:ref: sec:restrict --></a> for
value meanings and section <a
href="#x1-760009">9<!--tex4ht:ref: sec:dependencies --></a> for full syntax.
</dd><dt class="description">
<span
class="ecbx-1000">PROPERTIES</span> </dt><dd
class="description"><!--l. 88--><p class="noindent" > </p><!--l. 88--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">P</span><span
class="small-caps">R</span><span
class="small-caps">O</span><span
class="small-caps">P</span><span
class="small-caps">E</span><span
class="small-caps">R</span><span
class="small-caps">T</span><span
class="small-caps">I</span><span
class="small-caps">E</span><span
class="small-caps">S</span></span></span> Zero or more properties for this package. See section <a
href="#x1-900009.2.6">9.2.6<!--tex4ht:ref: sec:properties --></a> for value
meanings and section <a
href="#x1-760009">9<!--tex4ht:ref: sec:dependencies --></a> for full syntax. For EAPIs listed in table <a
href="#x1-70001r2">8.2<!--tex4ht:ref: tab:properties-table --></a> as having optional
support, ebuilds must not rely upon the package manager recognising or understanding
this variable in any way.
</p></dd><dt class="description">
<span
class="ecbx-1000">S</span> </dt><dd
class="description">The path to the temporary build directory, used by <span
class="ectt-1000">src_compile</span>, <span
class="ectt-1000">src_install </span>etc.
Defaults to <span
class="ectt-1000">${WORKDIR}/${P}</span>.</dd></dl>
<div class="table">
<!--l. 96--><p class="noindent" ><a
id="x1-70001r2"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 8.2: </span><span
class="content">EAPIs supporting <span
class="ectt-1000">PROPERTIES</span></span></div><!--tex4ht:label?: x1-70001r2 -->
<div class="tabular">
<table id="TBL-4" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-4-1g"><col
id="TBL-4-1" /><col
id="TBL-4-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-4-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-4-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-4-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports </span><span
class="ectt-1000">PROPERTIES</span><span
class="ecbx-1000">?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-4-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-4-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-4-2-2"
class="td11">Optionally </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-4-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-4-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-4-3-2"
class="td11">Optionally </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-4-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-4-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-4-4-2"
class="td11">Optionally </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-4-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-4-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-4-5-2"
class="td11">Optionally </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-4-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-4-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-4-6-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-4-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-4-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">8.3.1 </span> <a
id="x1-710008.3.1"></a>EAPI</h4>
<!--l. 114--><p class="noindent" >An empty or unset <span
class="ectt-1000">EAPI </span>value is equivalent to <span
class="ectt-1000">0</span>. Ebuilds must not assume that they will get a
particular one of these two values if they are expecting one of these two values.
</p><!--l. 117--><p class="noindent" >The package manager must either pre-set the <span
class="ectt-1000">EAPI </span>variable to <span
class="ectt-1000">0 </span>or ensure that it is unset before
sourcing the ebuild for metadata generation. When using the ebuild for other purposes, the
package manager must either pre-set <span
class="ectt-1000">EAPI </span>to the value specified by the ebuild’s metadata or ensure
that it is unset.
</p><!--l. 122--><p class="noindent" >If any of these variables are set to invalid values, the package manager’s behaviour is
undefined; ideally, an error in one ebuild should not prevent operations upon other ebuilds or
packages.
</p><!--l. 125--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">8.3.2 </span> <a
id="x1-720008.3.2"></a><span
class="ectt-1000">RDEPEND </span>value</h4>
<!--l. 128--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">R</span><span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">P</span><span
class="small-caps">E</span><span
class="small-caps">N</span><span
class="small-caps">D</span>-<span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">P</span><span
class="small-caps">E</span><span
class="small-caps">N</span><span
class="small-caps">D</span></span></span></p><!--l. 128--><p class="noindent" >In EAPIs listed in table <a
href="#x1-72001r3">8.3<!--tex4ht:ref: tab:rdepend-depend-table --></a> as having <span
class="ectt-1000">RDEPEND=DEPEND</span>, if <span
class="ectt-1000">RDEPEND </span>is unset (but not if it is set to
an empty string) in an ebuild, the package manager must set its value to be equal to the value of
<span
class="ectt-1000">DEPEND</span>.
</p><!--l. 132--><p class="noindent" >When dealing with eclasses, only values set in the ebuild itself are considered for this behaviour;
any <span
class="ectt-1000">DEPEND </span>or <span
class="ectt-1000">RDEPEND </span>set in an eclass does not change the implicit <span
class="ectt-1000">RDEPEND=DEPEND</span>
for the ebuild portion, and any <span
class="ectt-1000">DEPEND </span>value set in an eclass does not get added to
<span
class="ectt-1000">RDEPEND</span>.
</p>
<div class="table">
<!--l. 136--><p class="noindent" ><a
id="x1-72001r3"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 8.3: </span><span
class="content">EAPIs with <span
class="ectt-1000">RDEPEND=DEPEND </span>Default</span></div><!--tex4ht:label?: x1-72001r3 -->
<div class="tabular">
<table id="TBL-5" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-5-1g"><col
id="TBL-5-1" /><col
id="TBL-5-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-5-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-5-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-5-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ectt-1000">RDEPEND=DEPEND</span><span
class="ecbx-1000">?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-5-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-5-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-5-2-2"
class="td11">Yes </td></tr><tr
style="vertical-align:baseline;" id="TBL-5-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-5-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-5-3-2"
class="td11">Yes</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-5-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-5-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-5-4-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-5-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-5-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-5-5-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-5-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-5-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-5-6-2"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-5-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-5-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h3 class="sectionHead"><span class="titlemark">8.4 </span> <a
id="x1-730008.4"></a>Magic Ebuild-defined Variables</h3>
<!--l. 153--><p class="noindent" >The following variables must be defined by <span
class="ectt-1000">inherit </span>(see section <a
href="#x1-11300011.1">11.1<!--tex4ht:ref: sec:inherit --></a>, and may be considered to be
part of the ebuild’s metadata:
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">ECLASS</span> </dt><dd
class="description">The current eclass, or unset if there is no current eclass. This is handled magically
by <span
class="ectt-1000">inherit </span>and must not be modified manually.
</dd><dt class="description">
<span
class="ecbx-1000">INHERITED</span> </dt><dd
class="description">List of inherited eclass names. Again, this is handled magically by <span
class="ectt-1000">inherit</span>.</dd></dl>
<!--l. 162--><p class="noindent" ><span class="paragraphHead"><a
id="x1-740008.4"></a><span
class="ecbx-1000">Note:</span></span>
Thus, by extension of section <a
href="#x1-680008.1">8.1<!--tex4ht:ref: sec:metadata-invariance --></a>, <span
class="ectt-1000">inherit </span>may not be used conditionally, except upon constant
conditions.
</p><!--l. 165--><p class="noindent" >The following are special variables defined by the package manager for internal use and may or
may not be exported to the ebuild environment:
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">DEFINED_PHASES</span> </dt><dd
class="description"><!--l. 169--><p class="noindent" > </p><!--l. 169--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">F</span><span
class="small-caps">I</span><span
class="small-caps">N</span><span
class="small-caps">E</span><span
class="small-caps">D</span>-<span
class="small-caps">P</span><span
class="small-caps">H</span><span
class="small-caps">A</span><span
class="small-caps">S</span><span
class="small-caps">E</span><span
class="small-caps">S</span></span></span> A space separated arbitrarily ordered list of phase names (e.g.
<span
class="ectt-1000">configure setup unpack</span>) whose phase functions are defined by the ebuild or an eclass
inherited by the ebuild. If no phase functions are defined, a single hyphen is used instead
of an empty string. For EAPIs listed in table <a
href="#x1-75001r4">8.4<!--tex4ht:ref: tab:defined-phases-table --></a> as having optional <span
class="ectt-1000">DEFINED_PHASES</span>
support, package managers may not rely upon the metadata cache having this variable
defined, and must treat an empty string as “this information is not available”.</p></dd></dl>
<!--l. 177--><p class="noindent" ><span class="paragraphHead"><a
id="x1-750008.4"></a><span
class="ecbx-1000">Note:</span></span>
Thus, by extension of section <a
href="#x1-680008.1">8.1<!--tex4ht:ref: sec:metadata-invariance --></a>, phase functions must not be defined based upon any variant
condition.
</p>
<div class="table">
<!--l. 180--><p class="noindent" ><a
id="x1-75001r4"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 8.4: </span><span
class="content">EAPIs supporting <span
class="ectt-1000">DEFINED_PHASES</span></span></div><!--tex4ht:label?: x1-75001r4 -->
<div class="tabular">
<table id="TBL-6" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-6-1g"><col
id="TBL-6-1" /><col
id="TBL-6-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-6-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-6-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-6-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports </span><span
class="ectt-1000">DEFINED_PHASES</span><span
class="ecbx-1000">?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-6-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-6-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-6-2-2"
class="td11">Optionally </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-6-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-6-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-6-3-2"
class="td11">Optionally </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-6-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-6-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-6-4-2"
class="td11">Optionally </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-6-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-6-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-6-5-2"
class="td11">Optionally </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-6-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-6-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-6-6-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-6-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-6-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h2 class="chapterHead"><span class="titlemark">Chapter 9</span><br /><a
id="x1-760009"></a>Dependencies</h2>
<h3 class="sectionHead"><span class="titlemark">9.1 </span> <a
id="x1-770009.1"></a>Dependency Classes</h3>
<!--l. 6--><p class="noindent" >There are three classes of dependencies supported by ebuilds:
</p><!--l. 9--><p class="noindent" >
</p><ul>
<li class="compactitem">Build dependencies (<span
class="ectt-1000">DEPEND</span>). These must be installed and usable before the ebuild is
installed.
</li>
<li class="compactitem">Runtime dependencies (<span
class="ectt-1000">RDEPEND</span>). These must be installed and usable before the ebuild
is treated as usable.
</li>
<li class="compactitem">Post dependencies (<span
class="ectt-1000">PDEPEND</span>). These must be installed at some point.</li></ul>
<!--l. 16--><p class="noindent" >In addition, <span
class="ectt-1000">SRC_URI</span>, <span
class="ectt-1000">HOMEPAGE</span>, <span
class="ectt-1000">PROVIDE</span>, <span
class="ectt-1000">RESTRICT</span>, <span
class="ectt-1000">PROPERTIES </span>and <span
class="ectt-1000">LICENSE </span>use
dependency-style specifications to specify their values.
</p><!--l. 19--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">9.2 </span> <a
id="x1-780009.2"></a>Dependency Specification Format</h3>
<!--l. 21--><p class="noindent" >The following elements are recognised in at least one class of specification. All elements
must be surrounded on both sides by whitespace, except at the start and end of the
string.
</p><!--l. 25--><p class="noindent" >
</p><ul>
<li class="compactitem">A package dependency specification. Permitted in <span
class="ectt-1000">DEPEND</span>, <span
class="ectt-1000">RDEPEND</span>, <span
class="ectt-1000">PDEPEND</span>.
</li>
<li class="compactitem">A simple qualified package name. Permitted in <span
class="ectt-1000">PROVIDE </span>(and inside <span
class="ectt-1000">DEPEND </span>etc via the
previous item).
</li>
<li class="compactitem">A URI, in the form <span
class="ectt-1000">proto://host/path</span>. Permitted in <span
class="ectt-1000">SRC_URI </span>and <span
class="ectt-1000">HOMEPAGE</span>. In
EAPIs listed in table <a
href="#x1-78001r1">9.1<!--tex4ht:ref: tab:uri-arrows-table --></a> as supporting <span
class="ectt-1000">SRC_URI </span>arrows, may optionally be followed
by whitespace, then <span
class="ectt-1000">-></span>, then whitespace, then a simple filename when in <span
class="ectt-1000">SRC_URI</span>. For
<span
class="ectt-1000">SRC_URI </span>behaviour, see section <a
href="#x1-910009.2.7">9.2.7<!--tex4ht:ref: sec:src-uri-behaviour --></a>.
</li>
<li class="compactitem">A flat filename. Permitted in <span
class="ectt-1000">SRC_URI</span>.
</li>
<li class="compactitem">A license name (e.g. <span
class="ectt-1000">GPL-2</span>). Permitted in <span
class="ectt-1000">LICENSE</span>.
</li>
<li class="compactitem">A simple string. Permitted in <span
class="ectt-1000">RESTRICT </span>and <span
class="ectt-1000">PROPERTIES</span>.
</li>
<li class="compactitem">An all-of group, which consists of an open parenthesis, followed by whitespace,
followed by zero or more of (a dependency item of any kind followed by whitespace),
followed by a close parenthesis. More formally: <span
class="ectt-1000">all-of ::= ’(’ whitespace (item</span>
<span
class="ectt-1000">whitespace)* ’)’</span>. Permitted in all specification style variables.
</li>
<li class="compactitem">An any-of group, which consists of the string <span
class="ectt-1000">||</span>, followed by whitespace, followed
by an open parenthesis, followed by whitespace, followed by zero or more of
(a dependency item of any kind followed by whitespace), followed by a close
parenthesis. More formally: <span
class="ectt-1000">any-of ::= ’||’ whitespace ’(’ whitespace (item</span>
<span
class="ectt-1000">whitespace)* ’)’</span>. Permitted in <span
class="ectt-1000">DEPEND</span>, <span
class="ectt-1000">RDEPEND</span>, <span
class="ectt-1000">PDEPEND</span>, <span
class="ectt-1000">LICENSE</span>.
</li>
<li class="compactitem">A use-conditional group, which consists of an optional exclamation mark,
followed by a use flag name, followed by a question mark, followed by
whitespace, followed by an open parenthesis, followed by whitespace, followed
by zero or more of (a dependency item of any kind followed by whitespace),
followed by a close parenthesis. More formally: <span
class="ectt-1000">use-conditional ::= ’!’?</span>
<span
class="ectt-1000">flag-name ’?’ whitespace ’(’ whitespace (item whitespace)* ’)’</span>. Permitted
in all specification style variables.</li></ul>
<!--l. 53--><p class="noindent" >In particular, note that whitespace is not optional.
</p>
<div class="table">
<!--l. 55--><p class="noindent" ><a
id="x1-78001r1"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 9.1: </span><span
class="content">EAPIs supporting <span
class="ectt-1000">SRC_URI </span>arrows</span></div><!--tex4ht:label?: x1-78001r1 -->
<div class="tabular">
<table id="TBL-7" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-7-1g"><col
id="TBL-7-1" /><col
id="TBL-7-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-7-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-7-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-7-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports </span><span
class="ectt-1000">SRC_URI </span><span
class="ecbx-1000">arrows?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-7-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-7-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-7-2-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-7-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-7-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-7-3-2"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-7-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-7-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-7-4-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-7-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-7-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-7-5-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-7-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-7-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-7-6-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-7-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-7-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">9.2.1 </span> <a
id="x1-790009.2.1"></a>All-of Dependency Specifications</h4>
<!--l. 72--><p class="noindent" >In an all-of group, all of the child elements must be matched.
</p><!--l. 74--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">9.2.2 </span> <a
id="x1-800009.2.2"></a>Use-conditional Dependency Specifications</h4>
<!--l. 76--><p class="noindent" >In a use-conditional group, if the associated use flag is enabled (or disabled if it has an exclamation
mark prefix), all of the child elements must be matched.
</p><!--l. 79--><p class="noindent" >It is an error for a flag to be used if it is not included in <span
class="ectt-1000">IUSE_EFFECTIVE </span>as described in
section <a
href="#x1-11800012.1.1">12.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a>.
</p><!--l. 82--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">9.2.3 </span> <a
id="x1-810009.2.3"></a>Any-of Dependency Specifications</h4>
<!--l. 84--><p class="noindent" >Any use-conditional group that is an immediate child of an any-of group, if not enabled (disabled
for an exclamation mark prefixed use flag name), is not considered a member of the any-of group
for match purposes.
</p><!--l. 88--><p class="noindent" >In an any-of group, at least one immediate child element must be matched. A blocker
is considered to be matched if its associated package dependency specification is not
matched.
</p><!--l. 91--><p class="noindent" >An empty any-of group counts as being matched.
</p><!--l. 93--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">9.2.4 </span> <a
id="x1-820009.2.4"></a>Package Dependency Specifications</h4>
<!--l. 95--><p class="noindent" >A package dependency can be in one of the following base formats. A package manager must warn
or error on non-compliant input.
</p><!--l. 99--><p class="noindent" >
</p><ul>
<li class="compactitem">A simple <span
class="ectt-1000">category/package </span>name.
</li>
<li class="compactitem">An operator, as
described in section <a
href="#x1-840009.2.4">9.2.4<!--tex4ht:ref: sec:dep-operator --></a>, followed immediately by <span
class="ectt-1000">category/package</span>, followed by a
hyphen, followed by a version specification.</li></ul>
<!--l. 104--><p class="noindent" >In EAPIs shown in table <a
href="#x1-83001r2">9.2<!--tex4ht:ref: tab:slot-deps-table --></a> as supporting <span
class="ectt-1000">SLOT </span>dependencies, either of the above formats may
additionally be suffixed by a <span
class="ectt-1000">:slot </span>restriction, as described in section <a
href="#x1-860009.2.4">9.2.4<!--tex4ht:ref: sec:slot-dep --></a>. A package manager
must warn or error if slot dependencies are used with an EAPI not supporting <span
class="ectt-1000">SLOT</span>
dependencies.
</p><!--l. 109--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">U</span><span
class="small-caps">S</span><span
class="small-caps">E</span>-<span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">P</span><span
class="small-caps">S</span></span></span>
</p><!--l. 109--><p class="noindent" >In EAPIs shown in table <a
href="#x1-83002r3">9.3<!--tex4ht:ref: tab:use-deps-table --></a> as supporting 2-style or 4-style <span
class="ectt-1000">USE </span>dependencies, a specification may
additionally be suffixed by at most one 2-style or 4-style <span
class="ectt-1000">[use] </span>restriction, as described in
section <a
href="#x1-870009.2.4">9.2.4<!--tex4ht:ref: sec:use-dep --></a>. A package manager must warn or error if this feature is used with an EAPI not
supporting use dependencies.
</p>
<!--l. 114--><p class="noindent" ><span class="paragraphHead"><a
id="x1-830009.2.4"></a><span
class="ecbx-1000">Note:</span></span>
Order is important. The slot restriction must come before use dependencies.
</p>
<div class="table">
<!--l. 116--><p class="noindent" ><a
id="x1-83001r2"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 9.2: </span><span
class="content">EAPIs supporting <span
class="ectt-1000">SLOT </span>dependencies</span></div><!--tex4ht:label?: x1-83001r2 -->
<div class="tabular">
<table id="TBL-8" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-8-1g"><col
id="TBL-8-1" /><col
id="TBL-8-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-8-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-8-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-8-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports </span><span
class="ectt-1000">SLOT </span><span
class="ecbx-1000">dependencies?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-8-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-8-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-8-2-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-8-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-8-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-8-3-2"
class="td11">Named only</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-8-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-8-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-8-4-2"
class="td11">Named only </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-8-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-8-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-8-5-2"
class="td11">Named only </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-8-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-8-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-8-6-2"
class="td11">Named and operator </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-8-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-8-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<div class="table">
<!--l. 131--><p class="noindent" ><a
id="x1-83002r3"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 9.3: </span><span
class="content">EAPIs supporting <span
class="ectt-1000">USE </span>dependencies</span></div><!--tex4ht:label?: x1-83002r3 -->
<div class="tabular">
<table id="TBL-9" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-9-1g"><col
id="TBL-9-1" /><col
id="TBL-9-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-9-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-9-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-9-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports </span><span
class="ectt-1000">USE </span><span
class="ecbx-1000">dependencies?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-9-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-9-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-9-2-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-9-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-9-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-9-3-2"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-9-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-9-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-9-4-2"
class="td11">2-style </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-9-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-9-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-9-5-2"
class="td11">2-style </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-9-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-9-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-9-6-2"
class="td11">4-style </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-9-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-9-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h5 class="subsubsectionHead"><a
id="x1-840009.2.4"></a>Operators</h5>
<!--l. 149--><p class="noindent" >The following operators are available:
</p><dl class="description"><dt class="description">
<span
class="ectt-1000"><</span> </dt><dd
class="description">Strictly less than the specified version.
</dd><dt class="description">
<span
class="ectt-1000"><=</span> </dt><dd
class="description">Less than or equal to the specified version.
</dd><dt class="description">
<span
class="ectt-1000">=</span> </dt><dd
class="description">Exactly equal to the specified version. Special exception: if the version specified has an
asterisk immediately following it, a string prefix comparison is used instead. When an
asterisk is used, the specification must remain valid if the asterisk were removed. (An
asterisk used with any other operator is illegal.)
</dd><dt class="description">
<span
class="ectt-1000">~</span> </dt><dd
class="description">Equal to the specified version, except the revision part of the matching package may be
greater than the revision part of the specified version (<span
class="ectt-1000">-r0 </span>is assumed if no revision is
explicitly stated).
</dd><dt class="description">
<span
class="ectt-1000">>=</span> </dt><dd
class="description">Greater than or equal to the specified version.
</dd><dt class="description">
<span
class="ectt-1000">></span> </dt><dd
class="description">Strictly greater than the specified version.</dd></dl>
<!--l. 165--><p class="noindent" >
</p>
<h5 class="subsubsectionHead"><a
id="x1-850009.2.4"></a>Block Operator</h5>
<!--l. 167--><p class="noindent" >If the specification is prefixed with one or two exclamation marks, the named dependency is a
block rather than a requirement—that is to say, the specified package must not be installed, with
the following exceptions:
</p><!--l. 172--><p class="noindent" >
</p><ul>
<li class="compactitem">Blocks on a package provided exclusively by the ebuild do not count.
</li>
<li class="compactitem">Blocks on the ebuild itself do not count.</li></ul>
<!--l. 176--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">B</span><span
class="small-caps">A</span><span
class="small-caps">N</span><span
class="small-caps">G</span>-<span
class="small-caps">S</span><span
class="small-caps">T</span><span
class="small-caps">R</span><span
class="small-caps">E</span><span
class="small-caps">N</span><span
class="small-caps">G</span><span
class="small-caps">T</span><span
class="small-caps">H</span></span></span></p><!--l. 176--><p class="noindent" >There are two strengths of block: weak and strong. A weak block may be ignored by the package
manager, so long as any blocked package will be uninstalled later on. A strong block must not be
ignored. The mapping from one or two exclamation marks to strength is described in
table <a
href="#x1-85001r4">9.4<!--tex4ht:ref: tab:bang-strength-table --></a>.
</p>
<div class="table">
<!--l. 181--><p class="noindent" ><a
id="x1-85001r4"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 9.4: </span><span
class="content">Exclamation mark strengths for EAPIs</span></div><!--tex4ht:label?: x1-85001r4 -->
<div class="tabular">
<table id="TBL-10" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-10-1g"><col
id="TBL-10-1" /><col
id="TBL-10-2" /><col
id="TBL-10-3" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-10-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-10-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-10-1-2"
class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ectt-1000">!</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-10-1-3"
class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ectt-1000">!!</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-10-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-10-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-10-2-2"
class="td11">Unspecified</td><td style="white-space:nowrap; text-align:left;" id="TBL-10-2-3"
class="td11">Forbidden</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-10-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-10-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-10-3-2"
class="td11">Unspecified</td><td style="white-space:nowrap; text-align:left;" id="TBL-10-3-3"
class="td11">Forbidden</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-10-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-10-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-10-4-2"
class="td11">Weak </td><td style="white-space:nowrap; text-align:left;" id="TBL-10-4-3"
class="td11">Strong </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-10-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-10-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-10-5-2"
class="td11">Weak </td><td style="white-space:nowrap; text-align:left;" id="TBL-10-5-3"
class="td11">Strong </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-10-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-10-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-10-6-2"
class="td11">Weak </td><td style="white-space:nowrap; text-align:left;" id="TBL-10-6-3"
class="td11">Strong </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-10-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-10-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h5 class="subsubsectionHead"><a
id="x1-860009.2.4"></a>Slot Dependencies</h5>
<!--l. 200--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">L</span><span
class="small-caps">O</span><span
class="small-caps">T</span>-<span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">P</span><span
class="small-caps">S</span></span></span></p><!--l. 200--><p class="noindent" >A named slot dependency consists of a colon followed by a slot name. A specification with a named
slot dependency matches only if the slot of the matched package is equal to the slot specified. If the
slot of the package to match cannot be determined (e.g. because it is not a supported <span
class="ectt-1000">EAPI</span>), the
match is treated as unsuccessful.
</p><!--l. 205--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">L</span><span
class="small-caps">O</span><span
class="small-caps">T</span>-<span
class="small-caps">O</span><span
class="small-caps">P</span><span
class="small-caps">E</span><span
class="small-caps">R</span><span
class="small-caps">A</span><span
class="small-caps">T</span><span
class="small-caps">O</span><span
class="small-caps">R</span>-<span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">P</span><span
class="small-caps">S</span></span></span></p><!--l. 205--><p class="noindent" >An operator slot dependency consists of a colon followed by one of the following operators:
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">*</span> </dt><dd
class="description">Indicates that any slot value is acceptable. In addition, for runtime dependencies, indicates
that the package will not break if the matched package is uninstalled and replaced by
a different matching package in a different slot.
</dd><dt class="description">
<span
class="ecbx-1000">=</span> </dt><dd
class="description">Indicates that any slot value is acceptable. In addition, for runtime dependencies, indicates
that the package will break unless a matching package with slot equal to the slot of
the best installed version at the time the package was installed is available.</dd></dl>
<!--l. 217--><p class="noindent" >To implement the equals slot operator, the package manager will need to store the slot
of the best installed version of the matching package. The package manager may do
this by appending the appropriate slot after the equals sign when saving the package’s
dependencies. This syntax is only for package manager use and must not be used by
ebuilds.
</p><!--l. 222--><p class="noindent" >
</p>
<h5 class="subsubsectionHead"><a
id="x1-870009.2.4"></a>2-Style and 4-Style Use Dependencies</h5>
<!--l. 225--><p class="noindent" >A 2-style or 4-style use dependency consists of one of the following:
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">[opt]</span> </dt><dd
class="description">The flag must be enabled.
</dd><dt class="description">
<span
class="ecbx-1000">[opt=]</span> </dt><dd
class="description">The flag must be enabled if the flag is enabled for the package with the dependency,
or disabled otherwise.
</dd><dt class="description">
<span
class="ecbx-1000">[!opt=]</span> </dt><dd
class="description">The flag must be disabled if the flag is enabled for the package with the dependency,
or enabled otherwise.
</dd><dt class="description">
<span
class="ecbx-1000">[opt?]</span> </dt><dd
class="description">The flag must be enabled if the flag is enabled for the package with the dependency.
</dd><dt class="description">
<span
class="ecbx-1000">[!opt?]</span> </dt><dd
class="description">The flag must be disabled if the use flag is disabled for the package with the
dependency.
</dd><dt class="description">
<span
class="ecbx-1000">[-opt]</span> </dt><dd
class="description">The flag must be disabled.</dd></dl>
<!--l. 240--><p class="noindent" >Multiple requirements may be combined using commas, e.g. <span
class="ectt-1000">[first,-second,third?]</span>.
</p><!--l. 242--><p class="noindent" >When multiple requirements are specified, all must match for a successful match.
</p><!--l. 244--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">U</span><span
class="small-caps">S</span><span
class="small-caps">E</span>-<span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">P</span>-<span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">F</span><span
class="small-caps">A</span><span
class="small-caps">U</span><span
class="small-caps">L</span><span
class="small-caps">T</span><span
class="small-caps">S</span></span></span></p><!--l. 244--><p class="noindent" >In a 4-style use dependency, the flag name may immediately be followed by a <span
class="ecti-1000">default </span>specified by
either <span
class="ectt-1000">(+) </span>or <span
class="ectt-1000">(-)</span>. The former indicates that, when applying the use dependency to a
package that does not have the flag in question in <span
class="ectt-1000">IUSE_REFERENCEABLE</span>, the package
manager shall behave as if the flag were present and enabled; the latter, present and
disabled.
</p><!--l. 250--><p class="noindent" >Unless a 4-style default is specified, it is an error for a use dependency to be applied to an ebuild
which does not have the flag in question in <span
class="ectt-1000">IUSE_REFERENCEABLE</span>.
</p>
<!--l. 253--><p class="noindent" ><span class="paragraphHead"><a
id="x1-880009.2.4"></a><span
class="ecbx-1000">Note:</span></span>
By extension of the above, a default that could reference an ebuild using an EAPI not supporting
profile <span
class="ectt-1000">IUSE </span>injections cannot rely upon any particular behaviour for flags that would not have to
be part of <span
class="ectt-1000">IUSE</span>.
</p><!--l. 257--><p class="noindent" >It is an error for an ebuild to use a conditional use dependency when that ebuild does not have the
flag in <span
class="ectt-1000">IUSE_EFFECTIVE</span>.
</p><!--l. 260--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">9.2.5 </span> <a
id="x1-890009.2.5"></a>Restrict</h4>
<!--l. 263--><p class="noindent" >The following tokens are permitted inside <span
class="ectt-1000">RESTRICT</span>:
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">mirror</span> </dt><dd
class="description">The package’s <span
class="ectt-1000">SRC_URI </span>entries may not be mirrored, and mirrors should not be
checked when fetching.
</dd><dt class="description">
<span
class="ecbx-1000">fetch</span> </dt><dd
class="description">The package’s <span
class="ectt-1000">SRC_URI </span>entries may not be downloaded automatically. If entries are
not available, <span
class="ectt-1000">pkg_nofetch </span>is called.
</dd><dt class="description">
<span
class="ecbx-1000">strip</span> </dt><dd
class="description">No stripping of debug symbols from files to be installed may be performed.
</dd><dt class="description">
<span
class="ecbx-1000">userpriv</span> </dt><dd
class="description">The package manager may not drop root privileges when building the package.
</dd><dt class="description">
<span
class="ecbx-1000">test</span> </dt><dd
class="description">The <span
class="ectt-1000">src_test </span>phase must not be run.
</dd><dt class="description">
<span
class="ecbx-1000">sandbox</span> </dt><dd
class="description">The <span
class="ectt-1000">sandbox </span>tool must not be used when building the package.</dd></dl>
<!--l. 276--><p class="noindent" >Package managers may recognise other tokens, but ebuilds may not rely upon them being
supported.
</p><!--l. 278--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">9.2.6 </span> <a
id="x1-900009.2.6"></a>Properties</h4>
<!--l. 281--><p class="noindent" >The following tokens are permitted inside <span
class="ectt-1000">PROPERTIES</span>:
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">interactive</span> </dt><dd
class="description">The package may require interaction with the user via the tty.</dd></dl>
<!--l. 287--><p class="noindent" >Ebuilds may not rely upon any token being supported.
</p><!--l. 289--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">9.2.7 </span> <a
id="x1-910009.2.7"></a>SRC_URI</h4>
<!--l. 292--><p class="noindent" >All filename components that are enabled (i.e. not inside a use-conditional block that is not
matched) in <span
class="ectt-1000">SRC_URI </span>must be available in the <span
class="ectt-1000">DISTDIR </span>directory. In addition, these components
are used to make the <span
class="ectt-1000">A </span>and <span
class="ectt-1000">AA </span>variables.
</p><!--l. 296--><p class="noindent" >If a component contains a full URI with protocol, that download location must be used. Package
managers may also consult mirrors for their files.
</p><!--l. 299--><p class="noindent" >The special <span
class="ectt-1000">mirror:// </span>protocol must be supported. See section <a
href="#x1-360004.4.2">4.4.2<!--tex4ht:ref: sec:thirdpartymirrors --></a> for mirror details.
</p><!--l. 302--><p class="noindent" >If a simple filename rather than a full URI is provided, the package manager can only use mirrors
to download the file.
</p><!--l. 305--><p class="noindent" >The <span
class="ectt-1000">RESTRICT </span>metadata key can be used to impose additional restrictions upon downloading—see
section <a
href="#x1-890009.2.5">9.2.5<!--tex4ht:ref: sec:restrict --></a> for details.
</p><!--l. 308--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">R</span><span
class="small-caps">C</span>-<span
class="small-caps">U</span><span
class="small-caps">R</span><span
class="small-caps">I</span>-<span
class="small-caps">A</span><span
class="small-caps">R</span><span
class="small-caps">R</span><span
class="small-caps">O</span><span
class="small-caps">W</span><span
class="small-caps">S</span></span></span></p><!--l. 308--><p class="noindent" >In EAPIs supporting arrows, if an arrow is used, the filename used when saving to <span
class="ectt-1000">DISTDIR </span>shall
instead be the name on the right of the arrow. When consulting mirrors (except for those explicitly
listed on the left of the arrow, if <span
class="ectt-1000">mirror:// </span>is used), the filename to the right of the arrow shall be
requested instead of the filename in the URI.
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter 10</span><br /><a
id="x1-9200010"></a>Ebuild-defined Functions</h2>
<h3 class="sectionHead"><span class="titlemark">10.1 </span> <a
id="x1-9300010.1"></a>List of Functions</h3>
<!--l. 7--><p class="noindent" >The following is a list of functions that an ebuild, or eclass, may define, and which will be called by
the package manager as part of the build and/or install process. In all cases the package manager
must provide a default implementation of these functions; unless otherwise stated this must be a
no-op. Most functions must assume only that they have write access to the package’s working
directory (the <span
class="ectt-1000">WORKDIR </span>environment variable; see section <a
href="#x1-117001r1">12.1<!--tex4ht:ref: env-var-WORKDIR --></a>), and the temporary directory
<span
class="ectt-1000">T</span>; exceptions are noted below. All functions may assume that they have read access
to all system libraries, binaries and configuration files that are accessible to normal
users.
</p><!--l. 16--><p class="noindent" >The environment for functions run outside of the build sequence (that is, <span
class="ectt-1000">pkg_config</span>, <span
class="ectt-1000">pkg_info</span>,
<span
class="ectt-1000">pkg_prerm </span>and <span
class="ectt-1000">pkg_postrm</span>) must be the environment used for the build of the package, not the
current configuration.
</p><!--l. 20--><p class="noindent" >Ebuilds must not call nor assume the existence of any phase functions.
</p><!--l. 22--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">10.1.1 </span> <a
id="x1-9400010.1.1"></a>Initial Working Directories</h4>
<!--l. 25--><p class="noindent" >Some functions may assume that their initial working directory is set to a particular location; these
are noted below. If no initial working directory is mandated, it may be set to anything and the
ebuild must not rely upon a particular location for it. The ebuild <span
class="ecti-1000">may </span>assume that the initial
working directory for any phase is a trusted location that may only be written to by a privileged
user and group.
</p><!--l. 31--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">S</span>-<span
class="small-caps">W</span><span
class="small-caps">O</span><span
class="small-caps">R</span><span
class="small-caps">K</span><span
class="small-caps">D</span><span
class="small-caps">I</span><span
class="small-caps">R</span>-<span
class="small-caps">F</span><span
class="small-caps">A</span><span
class="small-caps">L</span><span
class="small-caps">L</span><span
class="small-caps">B</span><span
class="small-caps">A</span><span
class="small-caps">C</span><span
class="small-caps">K</span></span></span></p><!--l. 31--><p class="noindent" >Some functions are described as having an initial working directory of <span
class="ectt-1000">S </span>with an error or fallback
to <span
class="ectt-1000">WORKDIR</span>. For EAPIs listed in table <a
href="#x1-94001r1">10.1<!--tex4ht:ref: tab:s-fallback-table --></a> as having the fallback, this means that if <span
class="ectt-1000">S </span>is not a
directory before the start of the phase function, the initial working directory shall be <span
class="ectt-1000">WORKDIR</span>
instead. For EAPIs where it is a conditional error, if <span
class="ectt-1000">S </span>is not a directory before the start of the
phase function, it is a fatal error, unless all of the following conditions are true, in which case the
fallback to <span
class="ectt-1000">WORKDIR </span>is used:
</p><!--l. 40--><p class="noindent" >
</p><ul>
<li class="compactitem">The <span
class="ectt-1000">A </span>variable contains no items.
</li>
<li class="compactitem">The phase function in question is not in <span
class="ectt-1000">DEFINED_PHASES</span>.
</li>
<li class="compactitem">None of the phase functions <span
class="ectt-1000">unpack</span>, <span
class="ectt-1000">prepare</span>, <span
class="ectt-1000">configure</span>, <span
class="ectt-1000">compile </span>or <span
class="ectt-1000">install</span>, if
supported by the EAPI in question and occurring prior to the phase about to be
executed, are in <span
class="ectt-1000">DEFINED_PHASES</span>.</li></ul>
<div class="table">
<!--l. 47--><p class="noindent" ><a
id="x1-94001r1"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 10.1: </span><span
class="content">EAPIs with <span
class="ectt-1000">S </span>to <span
class="ectt-1000">WORKDIR </span>fallbacks</span></div><!--tex4ht:label?: x1-94001r1 -->
<div class="tabular">
<table id="TBL-11" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-11-1g"><col
id="TBL-11-1" /><col
id="TBL-11-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-11-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-11-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-11-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Fallback to </span><span
class="ectt-1000">WORKDIR </span><span
class="ecbx-1000">permitted?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-11-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-11-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-11-2-2"
class="td11">Always </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-11-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-11-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-11-3-2"
class="td11">Always </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-11-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-11-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-11-4-2"
class="td11">Always </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-11-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-11-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-11-5-2"
class="td11">Always </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-11-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-11-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-11-6-2"
class="td11">Conditional error </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-11-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-11-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">10.1.2 </span> <a
id="x1-9500010.1.2"></a>pkg_pretend</h4>
<!--l. 65--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">P</span><span
class="small-caps">K</span><span
class="small-caps">G</span>-<span
class="small-caps">P</span><span
class="small-caps">R</span><span
class="small-caps">E</span><span
class="small-caps">T</span><span
class="small-caps">E</span><span
class="small-caps">N</span><span
class="small-caps">D</span></span></span></p><!--l. 65--><p class="noindent" >The <span
class="ectt-1000">pkg_pretend </span>function is only called for EAPIs listed in table <a
href="#x1-95001r2">10.2<!--tex4ht:ref: tab:pkg-pretend-table --></a> as supporting
it.
</p><!--l. 68--><p class="noindent" >The <span
class="ectt-1000">pkg_pretend </span>function may be used to carry out sanity checks early on in the install process.
For example, if an ebuild requires a particular kernel configuration, it may perform that check in
<span
class="ectt-1000">pkg_pretend </span>and call <span
class="ectt-1000">eerror </span>and then <span
class="ectt-1000">die </span>with appropriate messages if the requirement is not
met.
</p><!--l. 73--><p class="noindent" ><span
class="ectt-1000">pkg_pretend </span>is run separately from the main phase function sequence, and does not participate in
any kind of environment saving. There is no guarantee that any of an ebuild’s dependencies will be
met at this stage, and no guarantee that the system state will not have changed substantially
before the next phase is executed.
</p><!--l. 78--><p class="noindent" ><span
class="ectt-1000">pkg_pretend </span>must not write to the filesystem.
</p>
<div class="table">
<!--l. 80--><p class="noindent" ><a
id="x1-95001r2"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 10.2: </span><span
class="content">EAPIs supporting <span
class="ectt-1000">pkg_pretend</span></span></div><!--tex4ht:label?: x1-95001r2 -->
<div class="tabular">
<table id="TBL-12" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-12-1g"><col
id="TBL-12-1" /><col
id="TBL-12-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-12-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-12-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-12-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports </span><span
class="ectt-1000">pkg_pretend</span><span
class="ecbx-1000">?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-12-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-12-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-12-2-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-12-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-12-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-12-3-2"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-12-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-12-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-12-4-2"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-12-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-12-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-12-5-2"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-12-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-12-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-12-6-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-12-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-12-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">10.1.3 </span> <a
id="x1-9600010.1.3"></a>pkg_setup</h4>
<!--l. 97--><p class="noindent" >The <span
class="ectt-1000">pkg_setup </span>function sets up the ebuild’s environment for all following functions,
before the build process starts. Further, it checks whether any necessary prerequisites
not covered by the package manager, e.g. that certain kernel configuration options are
fulfilled.
</p><!--l. 101--><p class="noindent" ><span
class="ectt-1000">pkg_setup </span>must be run with full filesystem permissions, including the ability to add new users
and/or groups to the system.
</p><!--l. 104--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">10.1.4 </span> <a
id="x1-9700010.1.4"></a>src_unpack</h4>
<!--l. 107--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">R</span><span
class="small-caps">C</span>-<span
class="small-caps">U</span><span
class="small-caps">N</span><span
class="small-caps">P</span><span
class="small-caps">A</span><span
class="small-caps">C</span><span
class="small-caps">K</span></span></span></p><!--l. 107--><p class="noindent" >The <span
class="ectt-1000">src_unpack </span>function extracts all of the package’s sources. In EAPIs lacking <span
class="ectt-1000">src_prepare</span>, it
may also apply patches and set up the package’s build system for further use.
</p><!--l. 111--><p class="noindent" >The initial working directory must be <span
class="ectt-1000">WORKDIR</span>, and the default implementation used when the
ebuild lacks the <span
class="ectt-1000">src_unpack </span>function shall behave as:
</p>
<div class="verbatim" id="verbatim-6">
src_unpack() {
 <br />    if [[ -n ${A} ]]; then
 <br />        unpack ${A}
 <br />    fi
 <br />}</div>
<!--l. 120--><p class="nopar" >
</p><!--l. 122--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">10.1.5 </span> <a
id="x1-9800010.1.5"></a>src_prepare</h4>
<!--l. 125--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">R</span><span
class="small-caps">C</span>-<span
class="small-caps">P</span><span
class="small-caps">R</span><span
class="small-caps">E</span><span
class="small-caps">P</span><span
class="small-caps">A</span><span
class="small-caps">R</span><span
class="small-caps">E</span></span></span></p><!--l. 125--><p class="noindent" >The <span
class="ectt-1000">src_prepare </span>function is only called for EAPIs listed in table <a
href="#x1-98001r3">10.3<!--tex4ht:ref: tab:src-prepare-table --></a> as supporting
it.
</p><!--l. 128--><p class="noindent" >The <span
class="ectt-1000">src_prepare </span>function can be used for post-unpack source preparation. The default
implementation does nothing.
</p><!--l. 131--><p class="noindent" >The initial working directory is <span
class="ectt-1000">S</span>, with an error or fallback to <span
class="ectt-1000">WORKDIR </span>as discussed in
section <a
href="#x1-9400010.1.1">10.1.1<!--tex4ht:ref: sec:s-to-workdir-fallback --></a>.
</p>
<div class="table">
<!--l. 134--><p class="noindent" ><a
id="x1-98001r3"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 10.3: </span><span
class="content">EAPIs supporting <span
class="ectt-1000">src_prepare</span></span></div><!--tex4ht:label?: x1-98001r3 -->
<div class="tabular">
<table id="TBL-13" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-13-1g"><col
id="TBL-13-1" /><col
id="TBL-13-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-13-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-13-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-13-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports </span><span
class="ectt-1000">src_prepare</span><span
class="ecbx-1000">?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-13-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-13-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-13-2-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-13-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-13-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-13-3-2"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-13-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-13-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-13-4-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-13-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-13-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-13-5-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-13-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-13-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-13-6-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-13-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-13-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">10.1.6 </span> <a
id="x1-9900010.1.6"></a>src_configure</h4>
<!--l. 152--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">R</span><span
class="small-caps">C</span>-<span
class="small-caps">C</span><span
class="small-caps">O</span><span
class="small-caps">N</span><span
class="small-caps">F</span><span
class="small-caps">I</span><span
class="small-caps">G</span><span
class="small-caps">U</span><span
class="small-caps">R</span><span
class="small-caps">E</span></span></span></p><!--l. 152--><p class="noindent" >The <span
class="ectt-1000">src_configure </span>function is only called for EAPIs listed in table <a
href="#x1-99001r4">10.4<!--tex4ht:ref: tab:src-configure-table --></a> as supporting
it.
</p><!--l. 155--><p class="noindent" >The initial working directory is <span
class="ectt-1000">S</span>, with an error or fallback to <span
class="ectt-1000">WORKDIR </span>as discussed in
section <a
href="#x1-9400010.1.1">10.1.1<!--tex4ht:ref: sec:s-to-workdir-fallback --></a>.
</p><!--l. 158--><p class="noindent" >The <span
class="ectt-1000">src_configure </span>function configures the package’s build environment. The default
implementation used when the ebuild lacks the <span
class="ectt-1000">src_configure </span>function shall behave
as:
</p>
<div class="verbatim" id="verbatim-7">
src_configure() {
 <br />    if [[ -x ${ECONF_SOURCE:-.}/configure ]]; then
 <br />        econf
 <br />    fi
 <br />}</div>
<!--l. 167--><p class="nopar" >
</p>
<div class="table">
<!--l. 169--><p class="noindent" ><a
id="x1-99001r4"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 10.4: </span><span
class="content">EAPIs supporting <span
class="ectt-1000">src_configure</span></span></div><!--tex4ht:label?: x1-99001r4 -->
<div class="tabular">
<table id="TBL-14" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-14-1g"><col
id="TBL-14-1" /><col
id="TBL-14-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-14-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-14-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-14-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports </span><span
class="ectt-1000">src_configure</span><span
class="ecbx-1000">?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-14-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-14-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-14-2-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-14-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-14-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-14-3-2"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-14-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-14-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-14-4-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-14-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-14-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-14-5-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-14-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-14-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-14-6-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-14-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-14-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">10.1.7 </span> <a
id="x1-10000010.1.7"></a>src_compile</h4>
<!--l. 187--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">R</span><span
class="small-caps">C</span>-<span
class="small-caps">C</span><span
class="small-caps">O</span><span
class="small-caps">M</span><span
class="small-caps">P</span><span
class="small-caps">I</span><span
class="small-caps">L</span><span
class="small-caps">E</span></span></span></p><!--l. 187--><p class="noindent" >The <span
class="ectt-1000">src_compile </span>function configures the package’s build environment in EAPIs lacking
<span
class="ectt-1000">src_configure</span>, and builds the package in all EAPIs.
</p><!--l. 190--><p class="noindent" >The initial working directory is <span
class="ectt-1000">S</span>, with an error or fallback to <span
class="ectt-1000">WORKDIR </span>as discussed in
section <a
href="#x1-9400010.1.1">10.1.1<!--tex4ht:ref: sec:s-to-workdir-fallback --></a>.
</p><!--l. 193--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">R</span><span
class="small-caps">C</span>-<span
class="small-caps">C</span><span
class="small-caps">O</span><span
class="small-caps">M</span><span
class="small-caps">P</span><span
class="small-caps">I</span><span
class="small-caps">L</span><span
class="small-caps">E</span>-0</span></span></p><!--l. 193--><p class="noindent" >For EAPIs listed in table <a
href="#x1-100001r5">10.5<!--tex4ht:ref: tab:src-compile-table --></a> as using format 0, the default implementation used when the ebuild
lacks the <span
class="ectt-1000">src_compile </span>function shall behave as:
</p>
<div class="verbatim" id="verbatim-8">
src_compile() {
 <br />    if [[ -x ./configure ]]; then
 <br />        econf
 <br />    fi
 <br />    if [[ -f Makefile ]] || [[ -f GNUmakefile ]] || [[ -f makefile ]]; then
 <br />        emake || die "emake failed"
 <br />    fi
 <br />}</div>
<!--l. 206--><p class="nopar" >
</p><!--l. 208--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">R</span><span
class="small-caps">C</span>-<span
class="small-caps">C</span><span
class="small-caps">O</span><span
class="small-caps">M</span><span
class="small-caps">P</span><span
class="small-caps">I</span><span
class="small-caps">L</span><span
class="small-caps">E</span>-1</span></span></p><!--l. 208--><p class="noindent" >For EAPIs listed in table <a
href="#x1-100001r5">10.5<!--tex4ht:ref: tab:src-compile-table --></a> as using format 1, the default implementation used when the ebuild
lacks the <span
class="ectt-1000">src_compile </span>function shall behave as:
</p>
<div class="verbatim" id="verbatim-9">
src_compile() {
 <br />    if [[ -x ${ECONF_SOURCE:-.}/configure ]]; then
 <br />        econf
 <br />    fi
 <br />    if [[ -f Makefile ]] || [[ -f GNUmakefile ]] || [[ -f makefile ]]; then
 <br />        emake || die "emake failed"
 <br />    fi
 <br />}</div>
<!--l. 221--><p class="nopar" >
</p><!--l. 223--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">R</span><span
class="small-caps">C</span>-<span
class="small-caps">C</span><span
class="small-caps">O</span><span
class="small-caps">M</span><span
class="small-caps">P</span><span
class="small-caps">I</span><span
class="small-caps">L</span><span
class="small-caps">E</span>-2</span></span></p><!--l. 223--><p class="noindent" >For EAPIs listed in table <a
href="#x1-100001r5">10.5<!--tex4ht:ref: tab:src-compile-table --></a> as using format 2, the default implementation used when the ebuild
lacks the <span
class="ectt-1000">src_compile </span>function shall behave as:
</p>
<div class="verbatim" id="verbatim-10">
src_compile() {
 <br />    if [[ -f Makefile ]] || [[ -f GNUmakefile ]] || [[ -f makefile ]]; then
 <br />        emake || die "emake failed"
 <br />    fi
 <br />}</div>
<!--l. 233--><p class="nopar" >
</p>
<div class="table">
<!--l. 235--><p class="noindent" ><a
id="x1-100001r5"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 10.5: </span><span
class="content"><span
class="ectt-1000">src_compile </span>behaviour for EAPIs</span></div><!--tex4ht:label?: x1-100001r5 -->
<div class="tabular">
<table id="TBL-15" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-15-1g"><col
id="TBL-15-1" /><col
id="TBL-15-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-15-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-15-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-15-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Format</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-15-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-15-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-15-2-2"
class="td11">0 </td></tr><tr
style="vertical-align:baseline;" id="TBL-15-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-15-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-15-3-2"
class="td11">1</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-15-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-15-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-15-4-2"
class="td11">2 </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-15-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-15-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-15-5-2"
class="td11">2 </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-15-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-15-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-15-6-2"
class="td11">2 </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-15-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-15-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">10.1.8 </span> <a
id="x1-10100010.1.8"></a>src_test</h4>
<!--l. 253--><p class="noindent" >The <span
class="ectt-1000">src_test </span>function runs unit tests for the newly built but not yet installed package as
provided.
</p><!--l. 256--><p class="noindent" >The initial working directory must be <span
class="ectt-1000">S </span>if that exists, falling back to <span
class="ectt-1000">WORKDIR </span>otherwise. The
default implementation used when the ebuild lacks the <span
class="ectt-1000">src_test </span>function must, if tests are
enabled, run <span
class="ectt-1000">make check </span>if and only if such a target is available, or if not run <span
class="ectt-1000">make test</span>, if and
only such a target is available. In both cases, if make returns non-zero the build must be
aborted.
</p><!--l. 262--><p class="noindent" >The <span
class="ectt-1000">src_test </span>function may be disabled by <span
class="ectt-1000">RESTRICT</span>. See section <a
href="#x1-890009.2.5">9.2.5<!--tex4ht:ref: sec:restrict --></a>.
</p><!--l. 264--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">10.1.9 </span> <a
id="x1-10200010.1.9"></a>src_install</h4>
<!--l. 267--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">R</span><span
class="small-caps">C</span>-<span
class="small-caps">I</span><span
class="small-caps">N</span><span
class="small-caps">S</span><span
class="small-caps">T</span><span
class="small-caps">A</span><span
class="small-caps">L</span><span
class="small-caps">L</span></span></span></p><!--l. 267--><p class="noindent" >The <span
class="ectt-1000">src_install </span>function installs the package’s content to a directory specified in
<span
class="ectt-1000">D</span>.
</p><!--l. 270--><p class="noindent" >The initial working directory is <span
class="ectt-1000">S</span>, with an error or fallback to <span
class="ectt-1000">WORKDIR </span>as discussed in
section <a
href="#x1-9400010.1.1">10.1.1<!--tex4ht:ref: sec:s-to-workdir-fallback --></a>.
</p><!--l. 273--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">R</span><span
class="small-caps">C</span>-<span
class="small-caps">I</span><span
class="small-caps">N</span><span
class="small-caps">S</span><span
class="small-caps">T</span><span
class="small-caps">A</span><span
class="small-caps">L</span><span
class="small-caps">L</span>-4</span></span></p><!--l. 273--><p class="noindent" >For EAPIs listed in table <a
href="#x1-102001r6">10.6<!--tex4ht:ref: tab:src-install-table --></a> as using format 4, the default implementation used when the ebuild
lacks the <span
class="ectt-1000">src_install </span>function shall behave as:
</p>
<div class="verbatim" id="verbatim-11">
src_install() {
 <br />    if [[ -f Makefile ]] || [[ -f GNUmakefile ]] || [[ -f makefile ]]; then
 <br />        emake DESTDIR="${D}" install
 <br />    fi
 <br />
 <br />    if ! declare -p DOCS >/dev/null 2>&1 ; then
 <br />        local d
 <br />        for d in README* ChangeLog AUTHORS NEWS TODO CHANGES \
 <br />                THANKS BUGS FAQ CREDITS CHANGELOG ; do
 <br />            [[ -s "${d}" ]] && dodoc "${d}"
 <br />        done
 <br />    elif declare -p DOCS | grep -q ’^declare -a ’ ; then
 <br />        dodoc "${DOCS[@]}"
 <br />    else
 <br />        dodoc ${DOCS}
 <br />    fi
 <br />}</div>
<!--l. 295--><p class="nopar" >
</p><!--l. 297--><p class="noindent" >For other EAPIs, the default implementation used when the ebuild lacks the <span
class="ectt-1000">src_install </span>function
is a no-op.
</p>
<div class="table">
<!--l. 300--><p class="noindent" ><a
id="x1-102001r6"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 10.6: </span><span
class="content"><span
class="ectt-1000">src_install </span>behaviour for EAPIs</span></div><!--tex4ht:label?: x1-102001r6 -->
<div class="tabular">
<table id="TBL-16" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-16-1g"><col
id="TBL-16-1" /><col
id="TBL-16-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-16-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-16-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-16-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Format</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-16-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-16-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-16-2-2"
class="td11">no-op </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-16-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-16-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-16-3-2"
class="td11">no-op </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-16-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-16-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-16-4-2"
class="td11">no-op </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-16-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-16-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-16-5-2"
class="td11">no-op </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-16-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-16-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-16-6-2"
class="td11">4 </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-16-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-16-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">10.1.10 </span> <a
id="x1-10300010.1.10"></a>pkg_preinst</h4>
<!--l. 318--><p class="noindent" >The <span
class="ectt-1000">pkg_preinst </span>function performs any special tasks that are required immediately before
merging the package to the live filesystem. It must not write outside of the directories specified by
the <span
class="ectt-1000">ROOT </span>and <span
class="ectt-1000">D </span>environment variables.
</p><!--l. 322--><p class="noindent" ><span
class="ectt-1000">pkg_preinst </span>must be run with full access to all files and directories below that specified by the
<span
class="ectt-1000">ROOT </span>and <span
class="ectt-1000">D </span>environment variables.
</p><!--l. 325--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">10.1.11 </span> <a
id="x1-10400010.1.11"></a>pkg_postinst</h4>
<!--l. 328--><p class="noindent" >The <span
class="ectt-1000">pkg_postinst </span>function performs any special tasks that are required immediately after
merging the package to the live filesystem. It must not write outside of the directory specified in
the <span
class="ectt-1000">ROOT </span>environment variable.
</p><!--l. 332--><p class="noindent" ><span
class="ectt-1000">pkg_postinst</span>, like, <span
class="ectt-1000">pkg_preinst</span>, must be run with full access to all files and directories below
that specified by the <span
class="ectt-1000">ROOT </span>environment variable.
</p><!--l. 335--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">10.1.12 </span> <a
id="x1-10500010.1.12"></a>pkg_prerm</h4>
<!--l. 338--><p class="noindent" >The <span
class="ectt-1000">pkg_prerm </span>function performs any special tasks that are required immediately before
unmerging the package from the live filesystem. It must not write outside of the directory specified
by the <span
class="ectt-1000">ROOT </span>environment variable.
</p><!--l. 342--><p class="noindent" ><span
class="ectt-1000">pkg_prerm </span>must be run with full access to all files and directories below that specified by the <span
class="ectt-1000">ROOT</span>
environment variable.
</p><!--l. 345--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">10.1.13 </span> <a
id="x1-10600010.1.13"></a>pkg_postrm</h4>
<!--l. 348--><p class="noindent" >The <span
class="ectt-1000">pkg_postrm </span>function performs any special tasks that are required immediately after
unmerging the package from the live filesystem. It must not write outside of the directory specified
by the <span
class="ectt-1000">ROOT </span>environment variable.
</p><!--l. 352--><p class="noindent" ><span
class="ectt-1000">pkg_postrm </span>must be run with full access to all files and directories below that specified by the
<span
class="ectt-1000">ROOT </span>environment variable.
</p><!--l. 355--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">10.1.14 </span> <a
id="x1-10700010.1.14"></a>pkg_config</h4>
<!--l. 358--><p class="noindent" >The <span
class="ectt-1000">pkg_config </span>function performs any custom steps required to configure a package after it has
been fully installed. It is the only ebuild function which may be interactive and prompt for user
input.
</p><!--l. 361--><p class="noindent" ><span
class="ectt-1000">pkg_config </span>must be run with full access to all files and directories inside of <span
class="ectt-1000">ROOT</span>.
</p><!--l. 363--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">10.1.15 </span> <a
id="x1-10800010.1.15"></a>pkg_info</h4>
<!--l. 366--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">P</span><span
class="small-caps">K</span><span
class="small-caps">G</span>-<span
class="small-caps">I</span><span
class="small-caps">N</span><span
class="small-caps">F</span><span
class="small-caps">O</span></span></span></p><!--l. 366--><p class="noindent" >The <span
class="ectt-1000">pkg_info </span>function may be called by the package manager when displaying information about
an installed package. In EAPIs listed in table <a
href="#x1-108001r7">10.7<!--tex4ht:ref: tab:pkg-info-table --></a> as supporting <span
class="ectt-1000">pkg_info </span>on non-installed
packages, it may also be called by the package manager when displaying information about a
non-installed package. In this case, ebuild authors should note that dependencies may not be
installed.
</p><!--l. 372--><p class="noindent" ><span
class="ectt-1000">pkg_info </span>must not write to the filesystem.
</p>
<div class="table">
<!--l. 374--><p class="noindent" ><a
id="x1-108001r7"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 10.7: </span><span
class="content">EAPIs supporting <span
class="ectt-1000">pkg_info </span>on non-installed packages</span></div><!--tex4ht:label?: x1-108001r7 -->
<div class="tabular">
<table id="TBL-17" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-17-1g"><col
id="TBL-17-1" /><col
id="TBL-17-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-17-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-17-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-17-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports </span><span
class="ectt-1000">pkg_info </span><span
class="ecbx-1000">on non-installed packages?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-17-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-17-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-17-2-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-17-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-17-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-17-3-2"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-17-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-17-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-17-4-2"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-17-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-17-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-17-5-2"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-17-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-17-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-17-6-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-17-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-17-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">10.1.16 </span> <a
id="x1-10900010.1.16"></a>pkg_nofetch</h4>
<!--l. 392--><p class="noindent" >The <span
class="ectt-1000">pkg_nofetch </span>function is run when the fetch phase of an fetch-restricted ebuild is run,
and the relevant source files are not available. It should direct the user to download all
relevant source files from their respective locations, with notes concerning licensing if
applicable.
</p><!--l. 396--><p class="noindent" ><span
class="ectt-1000">pkg_nofetch </span>must require no write access to any part of the filesystem.
</p><!--l. 398--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">10.1.17 </span> <a
id="x1-11000010.1.17"></a><span
class="ectt-1000">default_ </span>Phase Functions</h4>
<!--l. 401--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">F</span><span
class="small-caps">A</span><span
class="small-caps">U</span><span
class="small-caps">L</span><span
class="small-caps">T</span>-<span
class="small-caps">P</span><span
class="small-caps">H</span><span
class="small-caps">A</span><span
class="small-caps">S</span><span
class="small-caps">E</span>-<span
class="small-caps">F</span><span
class="small-caps">U</span><span
class="small-caps">N</span><span
class="small-caps">C</span><span
class="small-caps">S</span></span></span></p><!--l. 401--><p class="noindent" >In EAPIs listed in table <a
href="#x1-110001r8">10.8<!--tex4ht:ref: tab:default-phase-function-table --></a> as supporting <span
class="ectt-1000">default_ </span>phase functions, a function named
<span
class="ectt-1000">default_</span>(phase) that behaves as the default implementation for that EAPI shall be defined when
executing any ebuild phase listed in the table. Ebuilds must not call these functions except when in
the phase in question.
</p>
<div class="table">
<!--l. 407--><p class="noindent" ><a
id="x1-110001r8"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 10.8: </span><span
class="content">EAPIs supporting <span
class="ectt-1000">default_ </span>phase functions</span></div><!--tex4ht:label?: x1-110001r8 -->
<div class="tabular">
<table id="TBL-18" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-18-1g"><col
id="TBL-18-1" /><col
id="TBL-18-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-18-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-18-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-18-1-2"
class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports </span><span
class="ectt-1000">default_ </span><span
class="ecbx-1000">functions in phases</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-18-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-18-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-18-2-2"
class="td11">None </td></tr><tr
style="vertical-align:baseline;" id="TBL-18-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-18-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-18-3-2"
class="td11">None</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-18-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-18-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-18-4-2"
class="td11"><span
class="ectt-1000">pkg_nofetch</span>, <span
class="ectt-1000">src_unpack</span>, <span
class="ectt-1000">src_prepare</span>,
<span
class="ectt-1000">src_configure</span>, <span
class="ectt-1000">src_compile</span>, <span
class="ectt-1000">src_test</span> </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-18-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-18-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-18-5-2"
class="td11"><span
class="ectt-1000">pkg_nofetch</span>, <span
class="ectt-1000">src_unpack</span>, <span
class="ectt-1000">src_prepare</span>,
<span
class="ectt-1000">src_configure</span>, <span
class="ectt-1000">src_compile</span>, <span
class="ectt-1000">src_test</span> </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-18-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-18-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-18-6-2"
class="td11"><span
class="ectt-1000">pkg_nofetch</span>, <span
class="ectt-1000">src_unpack</span>, <span
class="ectt-1000">src_prepare</span>,
<span
class="ectt-1000">src_configure</span>, <span
class="ectt-1000">src_compile</span>, <span
class="ectt-1000">src_install</span>,
<span
class="ectt-1000">src_test</span> </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-18-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-18-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h3 class="sectionHead"><span class="titlemark">10.2 </span> <a
id="x1-11100010.2"></a>Call Order</h3>
<!--l. 427--><p class="noindent" >The call order for installing a package is:
</p><!--l. 430--><p class="noindent" >
</p><ul>
<li class="compactitem"><span
class="ectt-1000">pkg_pretend </span>(only for EAPIs listed in table <a
href="#x1-95001r2">10.2<!--tex4ht:ref: tab:pkg-pretend-table --></a>), which is called outside of the normal
call order process.
</li>
<li class="compactitem"><span
class="ectt-1000">pkg_setup</span>
</li>
<li class="compactitem"><span
class="ectt-1000">src_unpack</span>
</li>
<li class="compactitem"><span
class="ectt-1000">src_prepare </span>(only for EAPIs listed in table <a
href="#x1-98001r3">10.3<!--tex4ht:ref: tab:src-prepare-table --></a>)
</li>
<li class="compactitem"><span
class="ectt-1000">src_configure </span>(only for EAPIs listed in table <a
href="#x1-99001r4">10.4<!--tex4ht:ref: tab:src-configure-table --></a>)
</li>
<li class="compactitem"><span
class="ectt-1000">src_compile</span>
</li>
<li class="compactitem"><span
class="ectt-1000">src_test </span>(except if <span
class="ectt-1000">RESTRICT=test</span>)
</li>
<li class="compactitem"><span
class="ectt-1000">src_install</span>
</li>
<li class="compactitem"><span
class="ectt-1000">pkg_preinst</span>
</li>
<li class="compactitem"><span
class="ectt-1000">pkg_postinst</span></li></ul>
<!--l. 443--><p class="noindent" >The call order for uninstalling a package is:
</p><!--l. 446--><p class="noindent" >
</p><ul>
<li class="compactitem"><span
class="ectt-1000">pkg_prerm</span>
</li>
<li class="compactitem"><span
class="ectt-1000">pkg_postrm</span></li></ul>
<!--l. 450--><p class="noindent" >The call order for reinstalling a package is:
</p><!--l. 453--><p class="noindent" >
</p><ul>
<li class="compactitem"><span
class="ectt-1000">pkg_pretend </span>(only for EAPIs listed in table <a
href="#x1-95001r2">10.2<!--tex4ht:ref: tab:pkg-pretend-table --></a>), which is called outside of the normal
call order process.
</li>
<li class="compactitem"><span
class="ectt-1000">pkg_setup</span>
</li>
<li class="compactitem"><span
class="ectt-1000">src_unpack</span>
</li>
<li class="compactitem"><span
class="ectt-1000">src_prepare </span>(only for EAPIs listed in table <a
href="#x1-98001r3">10.3<!--tex4ht:ref: tab:src-prepare-table --></a>)
</li>
<li class="compactitem"><span
class="ectt-1000">src_configure </span>(only for EAPIs listed in table <a
href="#x1-99001r4">10.4<!--tex4ht:ref: tab:src-configure-table --></a>)
</li>
<li class="compactitem"><span
class="ectt-1000">src_compile</span>
</li>
<li class="compactitem"><span
class="ectt-1000">src_test </span>(except if <span
class="ectt-1000">RESTRICT=test</span>)
</li>
<li class="compactitem"><span
class="ectt-1000">src_install</span>
</li>
<li class="compactitem"><span
class="ectt-1000">pkg_preinst</span>
</li>
<li class="compactitem"><span
class="ectt-1000">pkg_prerm </span>for the package being replaced
</li>
<li class="compactitem"><span
class="ectt-1000">pkg_postrm </span>for the package being replaced
</li>
<li class="compactitem"><span
class="ectt-1000">pkg_postinst</span></li></ul>
<!--l. 468--><p class="noindent" >The call order for upgrading or downgrading a package is:
</p><!--l. 471--><p class="noindent" >
</p><ul>
<li class="compactitem"><span
class="ectt-1000">pkg_pretend </span>(only for EAPIs listed in table <a
href="#x1-95001r2">10.2<!--tex4ht:ref: tab:pkg-pretend-table --></a>), which is called outside of the normal
call order process.
</li>
<li class="compactitem"><span
class="ectt-1000">pkg_setup</span>
</li>
<li class="compactitem"><span
class="ectt-1000">src_unpack</span>
</li>
<li class="compactitem"><span
class="ectt-1000">src_prepare </span>(only for EAPIs listed in table <a
href="#x1-98001r3">10.3<!--tex4ht:ref: tab:src-prepare-table --></a>)
</li>
<li class="compactitem"><span
class="ectt-1000">src_configure </span>(only for EAPIs listed in table <a
href="#x1-99001r4">10.4<!--tex4ht:ref: tab:src-configure-table --></a>)
</li>
<li class="compactitem"><span
class="ectt-1000">src_compile</span>
</li>
<li class="compactitem"><span
class="ectt-1000">src_test </span>(except if <span
class="ectt-1000">RESTRICT=test</span>)
</li>
<li class="compactitem"><span
class="ectt-1000">src_install</span>
</li>
<li class="compactitem"><span
class="ectt-1000">pkg_preinst</span>
</li>
<li class="compactitem"><span
class="ectt-1000">pkg_postinst</span>
</li>
<li class="compactitem"><span
class="ectt-1000">pkg_prerm </span>for the package being replaced
</li>
<li class="compactitem"><span
class="ectt-1000">pkg_postrm </span>for the package being replaced</li></ul>
<!--l. 486--><p class="noindent" >The <span
class="ectt-1000">pkg_config</span>, <span
class="ectt-1000">pkg_info </span>and <span
class="ectt-1000">pkg_nofetch </span>functions are not called in a normal sequence. The
<span
class="ectt-1000">pkg_pretend </span>function is called some unspecified time before a (possibly hypothetical) normal
sequence.
</p><!--l. 490--><p class="noindent" >For installing binary packages, the <span
class="ectt-1000">src </span>phases are not called.
</p><!--l. 492--><p class="noindent" >When building binary packages that are not to be installed locally, the <span
class="ectt-1000">pkg_preinst </span>and
<span
class="ectt-1000">pkg_postinst </span>functions are not called.
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter 11</span><br /><a
id="x1-11200011"></a>Eclasses</h2>
<!--l. 4--><p class="noindent" >Eclasses serve to store common code that is used by more than one ebuild, which greatly aids
maintainability and reduces the tree size. However, due to metadata cache issues, care must be
taken in their use. In format they are similar to an ebuild, and indeed are sourced as part of any
ebuild using them. The interpreter is therefore the same, and the same requirements for being
parseable hold.
</p><!--l. 10--><p class="noindent" >Eclasses must be located in the <span
class="ectt-1000">eclass </span>directory in the top level of the repository—see section <a
href="#x1-400004.6">4.6<!--tex4ht:ref: sec:eclass-dir --></a>.
Each eclass is a single file named <span
class="ectt-1000"><name>.eclass</span>, where <span
class="ectt-1000"><name> </span>is the name of this eclass, used by
<span
class="ectt-1000">inherit </span>and <span
class="ectt-1000">EXPORT_FUNCTIONS </span>among other places.
</p>
<h3 class="sectionHead"><span class="titlemark">11.1 </span> <a
id="x1-11300011.1"></a>The inherit command</h3>
<!--l. 17--><p class="noindent" >An ebuild wishing to make use of an eclass does so by using the <span
class="ectt-1000">inherit </span>command in global scope.
This will cause the eclass to be sourced as part of the ebuild—any function or variable definitions
in the eclass will appear as part of the ebuild, with exceptions for certain metadata variables, as
described below.
</p><!--l. 22--><p class="noindent" >The <span
class="ectt-1000">inherit </span>command takes one or more parameters, which must be the names of eclasses
(excluding the <span
class="ectt-1000">.eclass </span>suffix and the path). For each parameter, in order, the named eclass is
sourced.
</p><!--l. 25--><p class="noindent" >Eclasses may end up being sourced multiple times.
</p><!--l. 27--><p class="noindent" >The <span
class="ectt-1000">inherit </span>command must also ensure that:
</p><!--l. 30--><p class="noindent" >
</p><ul>
<li class="compactitem">The <span
class="ectt-1000">ECLASS </span>variable is set to the name of the current eclass, when sourcing that eclass.
</li>
<li class="compactitem">Once all inheriting has been done, the <span
class="ectt-1000">INHERITED </span>metadata variable contains the name
of every eclass used, separated by whitespace.</li></ul>
<!--l. 35--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">11.2 </span> <a
id="x1-11400011.2"></a>Eclass-defined Metadata Keys</h3>
<!--l. 37--><p class="noindent" >The <span
class="ectt-1000">IUSE</span>, <span
class="ectt-1000">DEPEND</span>, <span
class="ectt-1000">RDEPEND </span>and <span
class="ectt-1000">PDEPEND </span>variables are handled specially when set by an eclass.
They must be accumulated across eclasses, appending the value set by each eclass to the resulting
value after the previous one is loaded. Then the eclass-defined value is appended to that defined by
the ebuild. In the case of <span
class="ectt-1000">RDEPEND</span>, this is done after the implicit <span
class="ectt-1000">RDEPEND </span>rules in section <a
href="#x1-720008.3.2">8.3.2<!--tex4ht:ref: sec:rdepend-depend --></a> are
applied.
</p><!--l. 43--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">11.3 </span> <a
id="x1-11500011.3"></a>EXPORT_FUNCTIONS</h3>
<!--l. 45--><p class="noindent" >There is one command available in the eclass environment that is neither available nor meaningful
in ebuilds—<span
class="ectt-1000">EXPORT_FUNCTIONS</span>. This can be used to alias ebuild phase functions from the eclass so
that an ebuild inherits a default definition whilst retaining the ability to override and call the
eclass-defined version from it. The use of it is best illustrated by an example; this is given in
listing <a
href="#x1-115001r1">11.1<!--tex4ht:ref: lst:export-functions --></a> and is a snippet from a hypothetical <span
class="ectt-1000">foo.eclass</span>.
</p><!--l. 52--><p class="noindent" ><a
id="x1-115001r1"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Listing 11.1: </span><span
class="content">EXPORT_FUNCTIONS example: foo.eclass</span></div><!--tex4ht:label?: x1-115001r1 -->
<div class="verbatim" id="verbatim-12">
foo_src_compile()
 <br />{
 <br />    econf --enable-gerbil \
 <br />            $(use_enable fnord)
 <br />    emake gerbil || die "Couldn’t make a gerbil"
 <br />    emake || die "emake failed"
 <br />}
 <br />
 <br />EXPORT_FUNCTIONS src_compile
 <br />  </div>
<!--l. 63--><p class="nopar" >
</p>
</div><hr class="endfloat" />
<!--l. 66--><p class="noindent" >This example defines an eclass <span
class="ectt-1000">src_compile </span>function and uses <span
class="ectt-1000">EXPORT_FUNCTIONS </span>to alias it.
Then any ebuild that inherits <span
class="ectt-1000">foo.eclass </span>will have a default <span
class="ectt-1000">src_compile </span>defined, but
should the author wish to override it he can access the function in <span
class="ectt-1000">foo.eclass </span>by calling
<span
class="ectt-1000">foo_src_compile</span>.
</p><!--l. 71--><p class="noindent" ><span
class="ectt-1000">EXPORT_FUNCTIONS </span>must only be used on ebuild phase functions. The function that is aliased
must be named <span
class="ectt-1000">eclassname_phasefunctionname</span>, where <span
class="ectt-1000">eclassname </span>is the name of the
eclass.
</p><!--l. 74--><p class="noindent" ><span
class="ectt-1000">EXPORT_FUNCTIONS </span>must be used at most once per eclass.
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter 12</span><br /><a
id="x1-11600012"></a>The Ebuild Environment</h2>
<h3 class="sectionHead"><span class="titlemark">12.1 </span> <a
id="x1-11700012.1"></a>Defined Variables</h3>
<!--l. 4--><p class="noindent" >The package manager must define the following environment variables. Not all variables are
meaningful in all phases; variables that are not meaningful in a given phase may be unset or set to
any value. Ebuilds must not attempt to modify any of these variables, unless otherwise
specified.
</p><!--l. 8--><p class="noindent" >Because of their special meanings, these variables may not be preserved consistently across all
phases as would normally happen due to environment saving (see <a
href="#x1-12100012.2">12.2<!--tex4ht:ref: sec:ebuild-env-state --></a>). For example,
<span
class="ectt-1000">EBUILD_PHASE </span>is different for every phase, and <span
class="ectt-1000">ROOT </span>may have changed between the various
different <span
class="ectt-1000">pkg_* </span>phases. Ebuilds must recalculate any variable they derive from an inconsistent
variable.
<a
id="x1-117001r1"></a>
</p><!--l. 16--><div class="longtable"> <table id="TBL-19" class="longtable"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-19-1g"><col
id="TBL-19-1" /><col
id="TBL-19-2" /><col
id="TBL-19-3" /><col
id="TBL-19-4" /></colgroup>
<tr
style="vertical-align:baseline;" id="TBL-19-1-"><td colspan="4" style="white-space:nowrap; text-align:center;" id="TBL-19-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"> <div class="caption"
><span class="id">Table 12.1: </span><span
class="content">Defined variables</span></div><!--tex4ht:label?: x1-117001r1 --> </div><a
id="x1-117002"></a>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-19-2-"><td colspan="4" style="white-space:nowrap; text-align:left;" id="TBL-19-2-1"
class="td11"><!--cmidrule-->
</td></tr><tr
style="vertical-align:baseline;" id="TBL-19-3-"><td style="white-space:nowrap; text-align:center;" id="TBL-19-3-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Variable</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-19-3-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Legal in</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-19-3-3"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Consistent?</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-19-3-4"
class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Description</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-19-4-"><td colspan="4" style="white-space:nowrap; text-align:left;" id="TBL-19-4-1"
class="td11"><!--cmidrule-->
</td></tr><tr
style="vertical-align:baseline;" id="TBL-19-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-5-1"
class="td11"> </td></tr><tr
style="vertical-align:baseline;" id="TBL-19-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-6-1"
class="td11"></td><td style="white-space:wrap; text-align:left;" id="TBL-19-6-2"
class="td11"> </td><td style="white-space:nowrap; text-align:left;" id="TBL-19-6-3"
class="td11"> </td><td style="white-space:wrap; text-align:left;" id="TBL-19-6-4"
class="td11">
</td></tr><tr
style="vertical-align:baseline;" id="TBL-19-18-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-18-1"
class="td11"><span
class="ectt-1000">P </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-18-2"
class="td11">
<!--l. 36--><p class="noindent" >all </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-18-3"
class="td11">No<span class="footnote-mark"><a
href="pms3.html#fn1x13"><sup class="textsuperscript">1</sup></a></span><a
id="x1-117003f1"></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-19-18-4"
class="td11">
<!--l. 38--><p class="noindent" >Package name and version, without the
revision part. For example, <span
class="ectt-1000">vim-7.0.174</span>. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-19-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-19-1"
class="td11"><span
class="ectt-1000">PN </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-19-2"
class="td11">
<!--l. 40--><p class="noindent" >all </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-19-3"
class="td11">ditto </td><td style="white-space:wrap; text-align:left;" id="TBL-19-19-4"
class="td11">
<!--l. 42--><p class="noindent" >Package name, for example <span
class="ectt-1000">vim</span>. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-20-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-20-1"
class="td11"><span
class="ectt-1000">CATEGORY </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-20-2"
class="td11">
<!--l. 44--><p class="noindent" >all </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-20-3"
class="td11">ditto </td><td style="white-space:wrap; text-align:left;" id="TBL-19-20-4"
class="td11">
<!--l. 46--><p class="noindent" >The package’s category, for example
<span
class="ectt-1000">app-editors</span>. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-21-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-21-1"
class="td11"><span
class="ectt-1000">PV </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-21-2"
class="td11">
<!--l. 48--><p class="noindent" >all </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-21-3"
class="td11">Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-19-21-4"
class="td11">
<!--l. 50--><p class="noindent" >Package version, with no revision. For example
<span
class="ectt-1000">7.0.174</span>. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-22-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-22-1"
class="td11"><span
class="ectt-1000">PR </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-22-2"
class="td11">
<!--l. 52--><p class="noindent" >all </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-22-3"
class="td11">Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-19-22-4"
class="td11">
<!--l. 54--><p class="noindent" >Package revision, or <span
class="ectt-1000">r0 </span>if none exists. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-23-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-23-1"
class="td11"><span
class="ectt-1000">PVR </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-23-2"
class="td11">
<!--l. 56--><p class="noindent" >all </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-23-3"
class="td11">Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-19-23-4"
class="td11">
<!--l. 58--><p class="noindent" >Package version and revision (if any), for
example <span
class="ectt-1000">7.0.174 </span>or <span
class="ectt-1000">7.0.174-r1</span>. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-24-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-24-1"
class="td11"><span
class="ectt-1000">PF </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-24-2"
class="td11">
<!--l. 60--><p class="noindent" >all </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-24-3"
class="td11">Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-19-24-4"
class="td11">
<!--l. 62--><p class="noindent" >Package name, version, and revision (if any),
for example <span
class="ectt-1000">vim-7.0.174-r1</span>. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-25-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-25-1"
class="td11"><span
class="ectt-1000">A </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-25-2"
class="td11">
<!--l. 64--><p class="noindent" ><span
class="ectt-1000">src_*</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-25-3"
class="td11">Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-19-25-4"
class="td11">
<!--l. 66--><p class="noindent" >All source files available for the package,
whitespace separated with no leading or
trailing whitespace, and in the order in which
the item first appears in a matched component
of <span
class="ectt-1000">SRC_URI</span>. Does not include any that are
disabled because of USE conditionals. The
value is calculated from the base names of
each element of the <span
class="ectt-1000">SRC_URI </span>ebuild metadata
variable. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-26-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-26-1"
class="td11"><span
class="ectt-1000">AA</span><span class="footnote-mark"><a
href="pms4.html#fn2x13"><sup class="textsuperscript">2</sup></a></span><a
id="x1-117004f2"></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-19-26-2"
class="td11">
<!--l. 74--><p class="noindent" ><span
class="ectt-1000">src_*</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-26-3"
class="td11">Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-19-26-4"
class="td11"><!--l. 76--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">A</span><span
class="small-caps">A</span></span> </span></p><!--l. 76--><p class="noindent" >All source files that could be available for
the package, including any that are disabled
in <span
class="ectt-1000">A </span>because of USE conditionals. The value
is calculated from the base names of each
element of the <span
class="ectt-1000">SRC_URI </span>ebuild metadata
variable. Only for EAPIs listed in table <a
href="#x1-117008r2">12.2<!--tex4ht:ref: tab:env-vars-table --></a>
as supporting <span
class="ectt-1000">AA</span>. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-27-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-27-1"
class="td11"><span
class="ectt-1000">FILESDIR </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-27-2"
class="td11">
<!--l. 81--><p class="noindent" ><span
class="ectt-1000">src_*</span><span class="footnote-mark"><a
href="pms5.html#fn3x13"><sup class="textsuperscript">3</sup></a></span> <a
id="x1-117005f3"></a> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-27-3"
class="td11">No </td><td style="white-space:wrap; text-align:left;" id="TBL-19-27-4"
class="td11">
<!--l. 83--><p class="noindent" >The full path to the package’s files directory,
used for small support files or patches. See
section <a
href="#x1-330004.3">4.3<!--tex4ht:ref: sec:package-dirs --></a>. May or may not exist; if a
repository provides no support files for the
package in question then an ebuild must be
prepared for the situation where <span
class="ectt-1000">FILESDIR</span>
points to a non-existent directory. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-28-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-28-1"
class="td11"><span
class="ectt-1000">PORTDIR </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-28-2"
class="td11">
<!--l. 88--><p class="noindent" >ditto </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-28-3"
class="td11">No </td><td style="white-space:wrap; text-align:left;" id="TBL-19-28-4"
class="td11">
<!--l. 90--><p class="noindent" >The full path to the master repository’s base
directory. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-29-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-29-1"
class="td11"><span
class="ectt-1000">DISTDIR </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-29-2"
class="td11">
<!--l. 92--><p class="noindent" >ditto </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-29-3"
class="td11">No </td><td style="white-space:wrap; text-align:left;" id="TBL-19-29-4"
class="td11">
<!--l. 94--><p class="noindent" >The full path to the directory in which the files
in the <span
class="ectt-1000">A </span>variable are stored. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-30-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-30-1"
class="td11"><span
class="ectt-1000">ECLASSDIR </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-30-2"
class="td11">
<!--l. 96--><p class="noindent" >ditto </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-30-3"
class="td11">No </td><td style="white-space:wrap; text-align:left;" id="TBL-19-30-4"
class="td11">
<!--l. 98--><p class="noindent" >The full path to the master repository’s eclass
directory. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-31-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-31-1"
class="td11"><span
class="ectt-1000">ROOT </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-31-2"
class="td11">
<!--l. 100--><p class="noindent" ><span
class="ectt-1000">pkg_*</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-31-3"
class="td11">No </td><td style="white-space:wrap; text-align:left;" id="TBL-19-31-4"
class="td11">
<!--l. 102--><p class="noindent" >The absolute path to the root directory into
which the package is to be merged. Phases
which run with full filesystem access must not
touch any files outside of the directory given in
<span
class="ectt-1000">ROOT</span>. Also of note is that in a cross-compiling
environment, binaries inside of <span
class="ectt-1000">ROOT </span>will not
be executable on the build machine, so ebuilds
must not call them. <span
class="ectt-1000">ROOT </span>must be non-empty
and end in a trailing slash. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-32-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-32-1"
class="td11"><span
class="ectt-1000">EROOT </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-32-2"
class="td11">
<!--l. 108--><p class="noindent" ><span
class="ectt-1000">pkg_*</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-32-3"
class="td11">No </td><td style="white-space:wrap; text-align:left;" id="TBL-19-32-4"
class="td11">
<!--l. 110--><p class="noindent" >Like <span
class="ectt-1000">ROOT</span>, but with <span
class="ectt-1000">EPREFIX </span>appended. This
is a convenience variable. See also the <span
class="ectt-1000">EPREFIX</span>
variable. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-33-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-33-1"
class="td11"><span
class="ectt-1000">T </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-33-2"
class="td11">
<!--l. 113--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-33-3"
class="td11">Partially<span class="footnote-mark"><a
href="pms6.html#fn4x13"><sup class="textsuperscript">4</sup></a></span><a
id="x1-117006f4"></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-19-33-4"
class="td11">
<!--l. 117--><p class="noindent" >The full path to a temporary directory for use
by the ebuild. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-34-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-34-1"
class="td11"><span
class="ectt-1000">TMPDIR </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-34-2"
class="td11">
<!--l. 119--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-34-3"
class="td11">Ditto </td><td style="white-space:wrap; text-align:left;" id="TBL-19-34-4"
class="td11">
<!--l. 121--><p class="noindent" >Must be set to the location of a usable
temporary directory, for any applications
called by an ebuild. Must not be used by
ebuilds directly; see <span
class="ectt-1000">T </span>above. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-35-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-35-1"
class="td11"><span
class="ectt-1000">HOME </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-35-2"
class="td11">
<!--l. 124--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-35-3"
class="td11">Ditto </td><td style="white-space:wrap; text-align:left;" id="TBL-19-35-4"
class="td11">
<!--l. 126--><p class="noindent" >The full path to an appropriate temporary
directory for use by any programs invoked by
the ebuild that may read or modify the home
directory. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-36-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-36-1"
class="td11"><span
class="ectt-1000">EPREFIX </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-36-2"
class="td11">
<!--l. 129--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-36-3"
class="td11">Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-19-36-4"
class="td11">
<!--l. 131--><p class="noindent" >The normalised offset-prefix path of an offset
installation. When <span
class="ectt-1000">EPREFIX </span>is not set in
the calling environment, <span
class="ectt-1000">EPREFIX </span>defaults to
the built-in offset-prefix that was set during
installation of the package manager. When
a different <span
class="ectt-1000">EPREFIX </span>value than the built-in
value is set in the calling environment, a
cross-prefix build is performed where using the
existing utilities, a package is built for the
given <span
class="ectt-1000">EPREFIX</span>, akin to <span
class="ectt-1000">ROOT</span>. See also <a
href="#x1-12000012.1.3">12.1.3<!--tex4ht:ref: sec:offset-vars --></a>. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-37-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-37-1"
class="td11"><span
class="ectt-1000">D </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-37-2"
class="td11">
<!--l. 137--><p class="noindent" ><span
class="ectt-1000">src_install</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-37-3"
class="td11">No </td><td style="white-space:wrap; text-align:left;" id="TBL-19-37-4"
class="td11">
<!--l. 139--><p class="noindent" >Contains the full path to the image directory
into which the package should be installed.
Must be non-empty and end in a trailing slash.</p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-38-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-38-1"
class="td11"> </td></tr>
<tr
style="vertical-align:baseline;" id="TBL-19-39-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-39-1"
class="td11"><span
class="ectt-1000">D </span>(continued) </td><td style="white-space:wrap; text-align:left;" id="TBL-19-39-2"
class="td11">
<!--l. 142--><p class="noindent" ><span
class="ectt-1000">pkg_preinst</span>,
<span
class="ectt-1000">pkg_postinst</span> </p> </td> <td style="white-space:nowrap; text-align:left;" id="TBL-19-39-3"
class="td11">Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-19-39-4"
class="td11">
<!--l. 144--><p class="noindent" >Contains the full path to the image that is
about to be or has just been merged. Must be
non-empty and end in a trailing slash. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-40-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-40-1"
class="td11"><span
class="ectt-1000">ED </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-40-2"
class="td11">
<!--l. 147--><p class="noindent" ><span
class="ectt-1000">src_install</span></p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-40-3"
class="td11">See <span
class="ectt-1000">D</span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-40-4"
class="td11">
<!--l. 149--><p class="noindent" >Like <span
class="ectt-1000">D</span>, but with <span
class="ectt-1000">EPREFIX </span>appended. This is
a convenience variable. See also the <span
class="ectt-1000">EPREFIX</span>
variable. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-41-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-41-1"
class="td11"><span
class="ectt-1000">IMAGE</span><span class="footnote-mark"><a
href="pms7.html#fn5x13"><sup class="textsuperscript">5</sup></a></span><a
id="x1-117007f5"></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-19-41-2"
class="td11">
<!--l. 152--><p class="noindent" ><span
class="ectt-1000">pkg_preinst</span>,
<span
class="ectt-1000">pkg_postinst</span> </p> </td> <td style="white-space:nowrap; text-align:left;" id="TBL-19-41-3"
class="td11">Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-19-41-4"
class="td11">
<!--l. 154--><p class="noindent" >Equal to <span
class="ectt-1000">D</span>. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-42-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-42-1"
class="td11"><span
class="ectt-1000">INSDESTTREE </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-42-2"
class="td11">
<!--l. 156--><p class="noindent" ><span
class="ectt-1000">src_install</span></p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-42-3"
class="td11">No </td><td style="white-space:wrap; text-align:left;" id="TBL-19-42-4"
class="td11">
<!--l. 158--><p class="noindent" >Controls the location where doins installs
things. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-43-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-43-1"
class="td11"><span
class="ectt-1000">USE </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-43-2"
class="td11">
<!--l. 160--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-43-3"
class="td11">Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-19-43-4"
class="td11">
<!--l. 162--><p class="noindent" >A whitespace-delimited list of all active USE
flags for this ebuild. See section <a
href="#x1-11800012.1.1">12.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a> for
details. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-44-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-44-1"
class="td11"><span
class="ectt-1000">EBUILD_PHASE </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-44-2"
class="td11">
<!--l. 165--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-44-3"
class="td11">No </td><td style="white-space:wrap; text-align:left;" id="TBL-19-44-4"
class="td11">
<!--l. 167--><p class="noindent" >Takes
one of the values <span
class="ectt-1000">config</span>, <span
class="ectt-1000">setup</span>, <span
class="ectt-1000">nofetch</span>,
<span
class="ectt-1000">unpack</span>, <span
class="ectt-1000">prepare</span>, <span
class="ectt-1000">configure</span>, <span
class="ectt-1000">compile</span>, <span
class="ectt-1000">test</span>,
<span
class="ectt-1000">install</span>, <span
class="ectt-1000">preinst</span>, <span
class="ectt-1000">postinst</span>, <span
class="ectt-1000">prerm</span>, <span
class="ectt-1000">postrm</span>,
<span
class="ectt-1000">info</span>, <span
class="ectt-1000">pretend </span>according to the top level
ebuild function that was executed by the
package manager. May be unset or any single
word that is not any of the above when
the ebuild is being sourced for other (e.g.
metadata or QA) purposes. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-45-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-45-1"
class="td11"><span
class="ectt-1000">WORKDIR </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-45-2"
class="td11">
<!--l. 173--><p class="noindent" ><span
class="ectt-1000">src_*</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-45-3"
class="td11">Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-19-45-4"
class="td11">
<!--l. 175--><p class="noindent" >The full path to the ebuild’s working directory,
in which all build data should be contained. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-46-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-46-1"
class="td11"><span
class="ectt-1000">KV </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-46-2"
class="td11">
<!--l. 178--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-46-3"
class="td11">Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-19-46-4"
class="td11"><!--l. 180--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">K</span><span
class="small-caps">V</span></span> </span></p><!--l. 180--><p class="noindent" >The version of the running kernel at the time
the ebuild was first executed, as returned by
the <span
class="ectt-1000">uname</span><span
class="ectt-1000"> -r </span>command or equivalent. May be
modified by ebuilds. Only for EAPIs listed in
table <a
href="#x1-117008r2">12.2<!--tex4ht:ref: tab:env-vars-table --></a> as supporting <span
class="ectt-1000">KV</span>. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-47-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-47-1"
class="td11"><span
class="ectt-1000">REPLACING_VERSIONS </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-47-2"
class="td11">
<!--l. 184--><p class="noindent" ><span
class="ectt-1000">pkg_* </span>(see
text) </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-47-3"
class="td11">Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-19-47-4"
class="td11">
<!--l. 186--><p class="noindent" >A whitespace-separated list of versions of this
package (including revision, if specified) that
are being replaced (uninstalled or overwritten)
as a result of this install. See section <a
href="#x1-11900012.1.2">12.1.2<!--tex4ht:ref: sec:replacing-versions --></a>.
Only for EAPIs listed in table <a
href="#x1-117008r2">12.2<!--tex4ht:ref: tab:env-vars-table --></a> as
supporting <span
class="ectt-1000">REPLACING_VERSIONS</span>. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-48-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-48-1"
class="td11"><span
class="ectt-1000">REPLACED_BY_VERSION </span></td><td style="white-space:wrap; text-align:left;" id="TBL-19-48-2"
class="td11">
<!--l. 191--><p class="noindent" ><span
class="ectt-1000">pkg_prerm</span>,
<span
class="ectt-1000">pkg_postrm</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-19-48-3"
class="td11">Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-19-48-4"
class="td11">
<!--l. 193--><p class="noindent" >The single version of this package (including
revision, if specified) that is replacing us, if we
are being uninstalled as part of an install, or
an empty string otherwise. See section <a
href="#x1-11900012.1.2">12.1.2<!--tex4ht:ref: sec:replacing-versions --></a>.
Only for EAPIs listed in table <a
href="#x1-117008r2">12.2<!--tex4ht:ref: tab:env-vars-table --></a> as
supporting <span
class="ectt-1000">REPLACED_BY_VERSION</span>. </p></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-49-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-49-1"
class="td11"> </td></tr><tr
style="vertical-align:baseline;" id="TBL-19-50-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-50-1"
class="td11"></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-51-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-51-1"
class="td11"> </td></tr><tr
style="vertical-align:baseline;" id="TBL-19-52-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-52-1"
class="td11"></td>
</tr>
<tr
style="vertical-align:baseline;" id="TBL-19-15-"><td colspan="4" style="white-space:nowrap; text-align:left;" id="TBL-19-15-1"
class="td11"><!--cmidrule--></td></tr><tr
style="vertical-align:baseline;" id="TBL-19-16-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-16-1"
class="td11"></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-19-17-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-17-1"
class="td11"></td></tr>
</table></div>
<div class="table">
<!--l. 200--><p class="noindent" ><a
id="x1-117008r2"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 12.2: </span><span
class="content">EAPIs supporting various env variables</span></div><!--tex4ht:label?: x1-117008r2 -->
<div class="tabular">
<table id="TBL-20" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-20-1g"><col
id="TBL-20-1" /><col
id="TBL-20-2" /><col
id="TBL-20-3" /><col
id="TBL-20-4" /><col
id="TBL-20-5" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-20-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-20-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-20-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ectt-1000">AA</span><span
class="ecbx-1000">?</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-20-1-3"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ectt-1000">KV</span><span
class="ecbx-1000">?</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-20-1-4"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ectt-1000">REPLACING_VERSIONS</span><span
class="ecbx-1000">?</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-20-1-5"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ectt-1000">REPLACED_BY_VERSION</span><span
class="ecbx-1000">?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-20-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-20-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-20-2-2"
class="td11">Yes</td><td style="white-space:nowrap; text-align:left;" id="TBL-20-2-3"
class="td11">Yes</td><td style="white-space:nowrap; text-align:left;" id="TBL-20-2-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-20-2-5"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-20-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-20-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-20-3-2"
class="td11">Yes</td><td style="white-space:nowrap; text-align:left;" id="TBL-20-3-3"
class="td11">Yes</td><td style="white-space:nowrap; text-align:left;" id="TBL-20-3-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-20-3-5"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-20-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-20-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-20-4-2"
class="td11">Yes</td><td style="white-space:nowrap; text-align:left;" id="TBL-20-4-3"
class="td11">Yes</td><td style="white-space:nowrap; text-align:left;" id="TBL-20-4-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-20-4-5"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-20-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-20-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-20-5-2"
class="td11">Yes</td><td style="white-space:nowrap; text-align:left;" id="TBL-20-5-3"
class="td11">Yes</td><td style="white-space:nowrap; text-align:left;" id="TBL-20-5-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-20-5-5"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-20-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-20-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-20-6-2"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-20-6-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-20-6-4"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-20-6-5"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-20-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-20-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<div class="table">
<!--l. 218--><p class="noindent" ><a
id="x1-117009r3"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 12.3: </span><span
class="content">EAPIs supporting offset-prefix env variables</span></div><!--tex4ht:label?: x1-117009r3 -->
<div class="tabular">
<table id="TBL-21" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-21-1g"><col
id="TBL-21-1" /><col
id="TBL-21-2" /><col
id="TBL-21-3" /><col
id="TBL-21-4" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-21-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-21-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-21-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ectt-1000">EPREFIX</span><span
class="ecbx-1000">?</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-21-1-3"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ectt-1000">EROOT</span><span
class="ecbx-1000">?</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-21-1-4"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ectt-1000">ED</span><span
class="ecbx-1000">?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-21-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-21-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-21-2-2"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-21-2-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-21-2-4"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-21-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-21-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-21-3-2"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-21-3-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-21-3-4"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-21-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-21-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-21-4-2"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-21-4-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-21-4-4"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-21-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-21-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-21-5-2"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-21-5-3"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-21-5-4"
class="td11">Yes</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-21-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-21-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-21-6-2"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-21-6-3"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-21-6-4"
class="td11">Yes</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-21-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-21-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<!--l. 236--><p class="noindent" >Except where otherwise noted, all variables set in the active profiles’ <span
class="ectt-1000">make.defaults </span>files must be
exported to the ebuild environment. <span
class="ectt-1000">CHOST</span>, <span
class="ectt-1000">CBUILD </span>and <span
class="ectt-1000">CTARGET</span>, if not set by profiles, must
contain either an appropriate machine tuple (the definition of appropriate is beyond the scope of
this specification) or be unset.
</p><!--l. 241--><p class="noindent" ><span
class="ectt-1000">PATH </span>must be initialized by the package manager to a “usable” default. The exact value here is left
up to interpretation, but it should include the equivalent “sbin” and “bin” and any package
manager specific directories.
</p><!--l. 245--><p class="noindent" ><span
class="ectt-1000">GZIP</span>, <span
class="ectt-1000">BZIP</span>, <span
class="ectt-1000">BZIP2</span>, <span
class="ectt-1000">CDPATH</span>, <span
class="ectt-1000">GREP_OPTIONS</span>, <span
class="ectt-1000">GREP_COLOR </span>and <span
class="ectt-1000">GLOBIGNORE </span>must not be
set.
</p>
<h4 class="subsectionHead"><span class="titlemark">12.1.1 </span> <a
id="x1-11800012.1.1"></a>USE and IUSE Handling</h4>
<!--l. 251--><p class="nopar" >This section discusses the handling of four variables:
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">IUSE</span> </dt><dd
class="description">is the variable calculated from the <span
class="ectt-1000">IUSE </span>values defined in ebuilds and eclasses.
</dd><dt class="description">
<span
class="ecbx-1000">IUSE_REFERENCEABLE</span> </dt><dd
class="description">is a variable calculated from <span
class="ectt-1000">IUSE </span>and a variety of other
sources described below. It is purely a conceptual variable; it is not exported to the
ebuild environment. Values in <span
class="ectt-1000">IUSE_REFERENCEABLE </span>may legally be used in queries
from other packages about an ebuild’s state (for example, for use dependencies).
</dd><dt class="description">
<span
class="ecbx-1000">IUSE_EFFECTIVE</span> </dt><dd
class="description">is another
conceptual, unexported variable. Values in <span
class="ectt-1000">IUSE_EFFECTIVE </span>are those which an ebuild
may legally use in queries about itself (for example, for the <span
class="ectt-1000">use </span>function, and for use
in dependency specification conditional blocks).
</dd><dt class="description">
<span
class="ecbx-1000">USE</span> </dt><dd
class="description">is a variable calculated by the package manager and exported to the ebuild
environment.</dd></dl>
<!--l. 265--><p class="noindent" >In all cases, the values of <span
class="ectt-1000">IUSE_REFERENCEABLE </span>and <span
class="ectt-1000">IUSE_EFFECTIVE </span>are undefined during
metadata generation.
</p><!--l. 268--><p class="noindent" >For EAPIs listed in table <a
href="#x1-60001r1">5.1<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as not supporting profile defined <span
class="ectt-1000">IUSE </span>injection, <span
class="ectt-1000">IUSE_REFERENCEABLE </span>is
equal to the calculated <span
class="ectt-1000">IUSE </span>value. For EAPIs where profile defined <span
class="ectt-1000">IUSE </span>injection is supported,
<span
class="ectt-1000">IUSE_REFERENCEABLE </span>is equal to <span
class="ectt-1000">IUSE_EFFECTIVE</span>.
</p><!--l. 273--><p class="noindent" >For EAPIs listed in table <a
href="#x1-60001r1">5.1<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as not supporting profile defined <span
class="ectt-1000">IUSE </span>injection, <span
class="ectt-1000">IUSE_EFFECTIVE</span>
contains the following values:
</p><!--l. 277--><p class="noindent" >
</p><ul>
<li class="compactitem">All values in the calculated <span
class="ectt-1000">IUSE </span>value.
</li>
<li class="compactitem">All possible values for the <span
class="ectt-1000">ARCH </span>variable.
</li>
<li class="compactitem">All legal use flag names whose name starts with the lowercase equivalent of any value
in the profile <span
class="ectt-1000">USE_EXPAND </span>variable followed by an underscore.</li></ul>
<!--l. 283--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">P</span><span
class="small-caps">R</span><span
class="small-caps">O</span><span
class="small-caps">F</span><span
class="small-caps">I</span><span
class="small-caps">L</span><span
class="small-caps">E</span>-<span
class="small-caps">I</span><span
class="small-caps">U</span><span
class="small-caps">S</span><span
class="small-caps">E</span>-<span
class="small-caps">I</span><span
class="small-caps">N</span><span
class="small-caps">J</span><span
class="small-caps">E</span><span
class="small-caps">C</span><span
class="small-caps">T</span><span
class="small-caps">I</span><span
class="small-caps">O</span><span
class="small-caps">N</span></span></span></p><!--l. 283--><p class="noindent" >For EAPIs listed in table <a
href="#x1-60001r1">5.1<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as supporting profile defined <span
class="ectt-1000">IUSE </span>injection, <span
class="ectt-1000">IUSE_EFFECTIVE</span>
contains the following values:
</p><!--l. 288--><p class="noindent" >
</p><ul>
<li class="compactitem">All values in the calculated <span
class="ectt-1000">IUSE </span>value.
</li>
<li class="compactitem">All values in the profile <span
class="ectt-1000">IUSE_IMPLICIT </span>variable.
</li>
<li class="compactitem">All values in the profile variable named <span
class="ectt-1000">USE_EXPAND_VALUES_${v}</span>, where <span
class="ectt-1000">${v}</span>
is any value in the intersection of the profile <span
class="ectt-1000">USE_EXPAND_UNPREFIXED </span>and
<span
class="ectt-1000">USE_EXPAND_IMPLICIT </span>variables.
</li>
<li class="compactitem">All values for <span
class="ectt-1000">${lower_v}_${x}</span>, where <span
class="ectt-1000">${x} </span>is all values in the profile variable named
<span
class="ectt-1000">USE_EXPAND_VALUES_${v}</span>, where <span
class="ectt-1000">${v} </span>is any value in the intersection of the profile
<span
class="ectt-1000">USE_EXPAND </span>and <span
class="ectt-1000">USE_EXPAND_IMPLICIT </span>variables and <span
class="ectt-1000">${lower_v} </span>is the lowercase
equivalent of <span
class="ectt-1000">${v}</span>.</li></ul>
<!--l. 299--><p class="noindent" >The <span
class="ectt-1000">USE </span>variable is set by the package manager. For each value in <span
class="ectt-1000">IUSE_EFFECTIVE</span>, <span
class="ectt-1000">USE </span>shall
contain that value if the flag is to be enabled for the ebuild in question, and shall not contain
that value if it is to be disabled. In EAPIs listed in table <a
href="#x1-60001r1">5.1<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as not supporting profile
defined <span
class="ectt-1000">IUSE </span>injection, <span
class="ectt-1000">USE </span>may contain other flag names that are not relevant for the
ebuild.
</p><!--l. 305--><p class="noindent" >For EAPIs listed in table <a
href="#x1-60001r1">5.1<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as supporting profile defined <span
class="ectt-1000">IUSE </span>injection, the variables named in
<span
class="ectt-1000">USE_EXPAND </span>and <span
class="ectt-1000">USE_EXPAND_UNPREFIXED </span>shall have their profile-provided values reduced to
contain only those values that are present in <span
class="ectt-1000">IUSE_EFFECTIVE</span>.
</p><!--l. 310--><p class="noindent" >For EAPIs listed in table <a
href="#x1-60001r1">5.1<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as supporting profile defined <span
class="ectt-1000">IUSE </span>injection, the package manager
must save the calculated value of <span
class="ectt-1000">IUSE_EFFECTIVE </span>when installing a package. Details are beyond
the scope of this specification.
</p><!--l. 314--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">12.1.2 </span> <a
id="x1-11900012.1.2"></a><span
class="ectt-1000">REPLACING_VERSIONS </span>and <span
class="ectt-1000">REPLACED_BY_VERSION</span></h4>
<!--l. 317--><p class="nopar" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">R</span><span
class="small-caps">E</span><span
class="small-caps">P</span><span
class="small-caps">L</span><span
class="small-caps">A</span><span
class="small-caps">C</span><span
class="small-caps">E</span>-<span
class="small-caps">V</span><span
class="small-caps">E</span><span
class="small-caps">R</span><span
class="small-caps">S</span><span
class="small-caps">I</span><span
class="small-caps">O</span><span
class="small-caps">N</span>-<span
class="small-caps">V</span><span
class="small-caps">A</span><span
class="small-caps">R</span><span
class="small-caps">S</span></span></span></p><!--l. 317--><p class="noindent" >In EAPIs listed in table <a
href="#x1-117008r2">12.2<!--tex4ht:ref: tab:env-vars-table --></a> as supporting it, the <span
class="ectt-1000">REPLACING_VERSIONS </span>variable shall be defined
in <span
class="ectt-1000">pkg_preinst </span>and <span
class="ectt-1000">pkg_postinst</span>. In addition, it <span
class="ecti-1000">may </span>be defined in <span
class="ectt-1000">pkg_pretend </span>and
<span
class="ectt-1000">pkg_setup</span>, although ebuild authors should take care to handle binary package creation and
installation correctly when using it in these phases.
</p><!--l. 323--><p class="noindent" ><span
class="ectt-1000">REPLACING_VERSIONS </span>is a list, not a single optional value, to handle pathological cases such as
installing <span
class="ectt-1000">foo-2:2 </span>to replace <span
class="ectt-1000">foo-2:1 </span>and <span
class="ectt-1000">foo-3:2</span>.
</p><!--l. 326--><p class="noindent" >In EAPIs listed in table <a
href="#x1-117008r2">12.2<!--tex4ht:ref: tab:env-vars-table --></a> as supporting it, the <span
class="ectt-1000">REPLACED_BY </span>variable shall be defined in
<span
class="ectt-1000">pkg_prerm </span>and <span
class="ectt-1000">pkg_postrm</span>. It shall contain at most one value.
</p><!--l. 329--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">12.1.3 </span> <a
id="x1-12000012.1.3"></a>Offset-prefix variables <span
class="ectt-1000">EPREFIX</span>, <span
class="ectt-1000">EROOT </span>and <span
class="ectt-1000">ED</span></h4>
<div class="table">
<!--l. 332--><p class="noindent" ><a
id="x1-120001r4"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 12.4: </span><span
class="content">EAPIs supporting offset-prefix</span></div><!--tex4ht:label?: x1-120001r4 -->
<div class="tabular">
<table id="TBL-22" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-22-1g"><col
id="TBL-22-1" /><col
id="TBL-22-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-22-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-22-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-22-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports offset-prefix?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-22-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-22-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-22-2-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-22-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-22-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-22-3-2"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-22-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-22-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-22-4-2"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-22-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-22-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-22-5-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-22-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-22-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-22-6-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-22-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-22-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<!--l. 348--><p class="nopar" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">O</span><span
class="small-caps">F</span><span
class="small-caps">F</span><span
class="small-caps">S</span><span
class="small-caps">E</span><span
class="small-caps">T</span>-<span
class="small-caps">P</span><span
class="small-caps">R</span><span
class="small-caps">E</span><span
class="small-caps">F</span><span
class="small-caps">I</span><span
class="small-caps">X</span>-<span
class="small-caps">V</span><span
class="small-caps">A</span><span
class="small-caps">R</span><span
class="small-caps">S</span></span></span></p><!--l. 348--><p class="noindent" >Table <a
href="#x1-120001r4">12.4<!--tex4ht:ref: tab:offset-support-table --></a> lists the EAPIs which support offset-prefix installations. This support was initially
added in EAPI 3, in the form of three extra variables. Two of these, <span
class="ectt-1000">EROOT </span>and <span
class="ectt-1000">ED</span>, are convenience
variables using the variable <span
class="ectt-1000">EPREFIX</span>. In EAPIs that do not support an offset-prefix, the
installation offset is hardwired to <span
class="ectt-1000">/usr</span>. In offset-prefix supporting EAPIs the installation offset is
set as <span
class="ectt-1000">${EPREFIX}/usr </span>and hence can be adjusted using the variable <span
class="ectt-1000">EPREFIX</span>. Note that the
behaviour of offset-prefix aware and agnostic is the same when <span
class="ectt-1000">EPREFIX </span>is set to the empty string
in offset-prefix aware EAPIs. The latter do have the variables <span
class="ectt-1000">ED </span>and <span
class="ectt-1000">EROOT </span>properly set,
though.
</p>
<h3 class="sectionHead"><span class="titlemark">12.2 </span> <a
id="x1-12100012.2"></a>The state of variables between functions</h3>
<!--l. 4--><p class="nopar" >Exported and default scope variables are saved between functions. A non-local variable set in a
function earlier in the call sequence must have its value preserved for later functions, including
functions executed as part of a later uninstall.
</p>
<!--l. 8--><p class="nopar" ><span class="paragraphHead"><a
id="x1-12200012.2"></a><span
class="ecbx-1000">Note:</span></span>
<span
class="ectt-1000">pkg_pretend </span>is <span
class="ecti-1000">not </span>part of the normal call sequence, and does not take part in environment
saving.
</p><!--l. 11--><p class="noindent" >Variables that were exported must remain exported in later functions; variables with default
visibility may retain default visibility or be exported.
</p><!--l. 14--><p class="noindent" >Variables with special meanings to the package manager are excluded from this rule.
</p><!--l. 16--><p class="noindent" >Global variables must only contain invariant values (see <a
href="#x1-680008.1">8.1<!--tex4ht:ref: sec:metadata-invariance --></a>). If a global variable’s value is
invariant, it may have the value that would be generated at any given point in the build
sequence.
</p><!--l. 20--><p class="noindent" >This is demonstrated by code listing <a
href="#x1-122001r1">12.1<!--tex4ht:ref: lst:env-saving --></a>.
</p><!--l. 23--><p class="noindent" ><a
id="x1-122001r1"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Listing 12.1: </span><span
class="content">Environment state between functions</span></div><!--tex4ht:label?: x1-122001r1 -->
<div class="verbatiminput">
<span
class="ectt-1000">GLOBAL_VARIABLE="a"</span>
<span
class="ectt-1000"> </span><br />
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000">src_compile()</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000">{</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> GLOBAL_VARIABLE="b"</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> DEFAULT_VARIABLE="c"</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> export</span><span
class="ectt-1000"> EXPORTED_VARIABLE="d"</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> local</span><span
class="ectt-1000"> LOCAL_VARIABLE="e"</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000">}</span>
<span
class="ectt-1000"> </span><br />
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000">src_install(){</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> [[</span><span
class="ectt-1000"> ${GLOBAL_VARIABLE}</span><span
class="ectt-1000"> ==</span><span
class="ectt-1000"> "a"</span><span
class="ectt-1000"> ]]</span><span
class="ectt-1000"> \</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> ||</span><span
class="ectt-1000"> [[</span><span
class="ectt-1000"> ${GLOBAL_VARIABLE}</span><span
class="ectt-1000"> ==</span><span
class="ectt-1000"> "b"</span><span
class="ectt-1000"> ]]</span><span
class="ectt-1000"> \</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> ||</span><span
class="ectt-1000"> die</span><span
class="ectt-1000"> "broken</span><span
class="ectt-1000"> env</span><span
class="ectt-1000"> saving</span><span
class="ectt-1000"> for</span><span
class="ectt-1000"> globals"</span>
<span
class="ectt-1000"> </span><br />
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> [[</span><span
class="ectt-1000"> ${DEFAULT_VARIABLE}</span><span
class="ectt-1000"> ==</span><span
class="ectt-1000"> "c"</span><span
class="ectt-1000"> ]]</span><span
class="ectt-1000"> \</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> ||</span><span
class="ectt-1000"> die</span><span
class="ectt-1000"> "broken</span><span
class="ectt-1000"> env</span><span
class="ectt-1000"> saving</span><span
class="ectt-1000"> for</span><span
class="ectt-1000"> default"</span>
<span
class="ectt-1000"> </span><br />
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> [[</span><span
class="ectt-1000"> ${EXPORTED_VARIABLE}</span><span
class="ectt-1000"> ==</span><span
class="ectt-1000"> "d"</span><span
class="ectt-1000"> ]]</span><span
class="ectt-1000"> \</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> ||</span><span
class="ectt-1000"> die</span><span
class="ectt-1000"> "broken</span><span
class="ectt-1000"> env</span><span
class="ectt-1000"> saving</span><span
class="ectt-1000"> for</span><span
class="ectt-1000"> exported"</span>
<span
class="ectt-1000"> </span><br />
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> [[</span><span
class="ectt-1000"> $(printenv</span><span
class="ectt-1000"> EXPORTED_VARIABLE</span><span
class="ectt-1000"> )</span><span
class="ectt-1000"> ==</span><span
class="ectt-1000"> "d"</span><span
class="ectt-1000"> ]]</span><span
class="ectt-1000"> \</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> ||</span><span
class="ectt-1000"> die</span><span
class="ectt-1000"> "broken</span><span
class="ectt-1000"> env</span><span
class="ectt-1000"> saving</span><span
class="ectt-1000"> for</span><span
class="ectt-1000"> exported"</span>
<span
class="ectt-1000"> </span><br />
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> [[</span><span
class="ectt-1000"> -z</span><span
class="ectt-1000"> ${LOCAL_VARIABLE}</span><span
class="ectt-1000"> ]]</span><span
class="ectt-1000"> \</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> ||</span><span
class="ectt-1000"> die</span><span
class="ectt-1000"> "broken</span><span
class="ectt-1000"> env</span><span
class="ectt-1000"> saving</span><span
class="ectt-1000"> for</span><span
class="ectt-1000"> locals"</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000">}</span>
</div>
</div><hr class="endfloat" />
<h3 class="sectionHead"><span class="titlemark">12.3 </span> <a
id="x1-12300012.3"></a>Available commands</h3>
<!--l. 4--><p class="nopar" >This section documents the commands available to an ebuild. Unless otherwise specified, they may
be aliases, shell functions, or executables in the ebuild’s <span
class="ectt-1000">PATH</span>.
</p><!--l. 7--><p class="noindent" >When an ebuild is being sourced for metadata querying rather than for a build (that is to say,
when none of the <span
class="ectt-1000">src_ </span>or <span
class="ectt-1000">pkg_ </span>functions are to be called), no external command may be executed.
The package manager may take steps to enforce this.
</p><!--l. 11--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">12.3.1 </span> <a
id="x1-12400012.3.1"></a>System commands</h4>
<!--l. 13--><p class="nopar" >Any ebuild not listed in the system set for the active profile(s) may assume the presence of every
command that is always provided by the system set for that profile. However, it must target the
lowest common denominator of all systems on which it might be installed—in most
cases this means that the only packages that can be assumed to be present are those
listed in the <span
class="ectt-1000">base </span>profile or equivalent, which is inherited by all available profiles. If an
ebuild requires any applications not provided by the system profile, or that are provided
conditionally based on USE flags, appropriate dependencies must be used to ensure their
presence.
</p><!--l. 21--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><a
id="x1-12500012.3.1"></a>Guaranteed system commands</h5>
<!--l. 24--><p class="nopar" >The following commands must always be available in the ebuild environment:
</p><ul>
<li class="compactitem">All builtin commands in GNU bash, version 3.2<span class="footnote-mark"><a
href="pms8.html#fn6x13"><sup class="textsuperscript">6</sup></a></span><a
id="x1-125001f6"></a> .
</li>
<li class="compactitem"><span
class="ectt-1000">sed </span>must be available, and must support all forms of invocations valid for GNU sed
version 4 or later.
</li>
<li class="compactitem"><span
class="ectt-1000">patch </span>must be available, and must support all inputs valid for GNU patch.</li></ul>
<!--l. 34--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">12.3.2 </span> <a
id="x1-12600012.3.2"></a>Commands provided by package dependencies</h4>
<!--l. 36--><p class="nopar" >In some cases a package’s build process will require the availability of executables not provided by
the core system, a common example being autotools. Commands provided by dependencies are
available in the following cases:
</p><ul>
<li class="compactitem">In the <span
class="ectt-1000">src </span>phases, any command provided by a package listed in <span
class="ectt-1000">DEPEND </span>is available.
</li>
<li class="compactitem">In the <span
class="ectt-1000">pkg </span>phases, at least one of the following conditions must be met:
<ul>
<li class="compactitem">Any command provided by a package listed in <span
class="ectt-1000">DEPEND </span>is available.
</li>
<li class="compactitem">Any command provided by a package listed in <span
class="ectt-1000">RDEPEND </span>is available.</li></ul>
</li></ul>
<!--l. 48--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">12.3.3 </span> <a
id="x1-12700012.3.3"></a>Ebuild-specific Commands</h4>
<!--l. 3--><p class="nopar" >The following commands will always be available in the ebuild environment, provided by the
package manager. Except where otherwise noted, they may be internal (shell functions or aliases)
or external commands available in <span
class="ectt-1000">PATH</span>; where this is not specified, ebuilds may not rely upon
either behaviour.
</p><!--l. 8--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><a
id="x1-12800012.3.3"></a>Failure behaviour and related commands</h5>
<!--l. 11--><p class="nopar" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">D</span><span
class="small-caps">I</span><span
class="small-caps">E</span>-<span
class="small-caps">O</span><span
class="small-caps">N</span>-<span
class="small-caps">F</span><span
class="small-caps">A</span><span
class="small-caps">I</span><span
class="small-caps">L</span><span
class="small-caps">U</span><span
class="small-caps">R</span><span
class="small-caps">E</span></span></span></p><!--l. 11--><p class="noindent" >Where a command is listed as having EAPI dependent failure behaviour, a failure shall either
result in a non-zero exit status or abort the build process, as determined by table <a
href="#x1-128001r5">12.5<!--tex4ht:ref: tab:commands-die-table --></a>.
</p><!--l. 15--><p class="noindent" >The following commands affect this behaviour:
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">nonfatal</span> </dt><dd
class="description"><!--l. 17--><p class="noindent" > </p><!--l. 17--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">N</span><span
class="small-caps">O</span><span
class="small-caps">N</span><span
class="small-caps">F</span><span
class="small-caps">A</span><span
class="small-caps">T</span><span
class="small-caps">A</span><span
class="small-caps">L</span></span></span> Executes the remainder of its arguments as a command, preserving the exit
status. If this results in a command being called that would normally abort the build
process due to a failure (but not due to an explicit <span
class="ectt-1000">die </span>or <span
class="ectt-1000">assert </span>call), instead a
non-zero exit status shall be returned. Only in EAPIs listed in table <a
href="#x1-128001r5">12.5<!--tex4ht:ref: tab:commands-die-table --></a> as supporting
<span
class="ectt-1000">nonfatal</span>.</p></dd></dl>
<div class="table">
<!--l. 24--><p class="noindent" ><a
id="x1-128001r5"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 12.5: </span><span
class="content">EAPI Command Failure Behaviour</span></div><!--tex4ht:label?: x1-128001r5 -->
<div class="tabular">
<table id="TBL-23" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-23-1g"><col
id="TBL-23-1" /><col
id="TBL-23-2" /><col
id="TBL-23-3" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-23-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-23-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-23-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Command failure behaviour</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-23-1-3"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports </span><span
class="ectt-1000">nonfatal</span><span
class="ecbx-1000">?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-23-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-23-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-23-2-2"
class="td11">Non-zero exit </td><td style="white-space:nowrap; text-align:left;" id="TBL-23-2-3"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-23-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-23-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-23-3-2"
class="td11">Non-zero exit </td><td style="white-space:nowrap; text-align:left;" id="TBL-23-3-3"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-23-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-23-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-23-4-2"
class="td11">Non-zero exit </td><td style="white-space:nowrap; text-align:left;" id="TBL-23-4-3"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-23-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-23-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-23-5-2"
class="td11">Non-zero exit </td><td style="white-space:nowrap; text-align:left;" id="TBL-23-5-3"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-23-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-23-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-23-6-2"
class="td11">Aborts </td><td style="white-space:nowrap; text-align:left;" id="TBL-23-6-3"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-23-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-23-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h5 class="subsubsectionHead"><a
id="x1-12900012.3.3"></a>Banned commands</h5>
<!--l. 43--><p class="nopar" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">B</span><span
class="small-caps">A</span><span
class="small-caps">N</span><span
class="small-caps">N</span><span
class="small-caps">E</span><span
class="small-caps">D</span>-<span
class="small-caps">C</span><span
class="small-caps">O</span><span
class="small-caps">M</span><span
class="small-caps">M</span><span
class="small-caps">A</span><span
class="small-caps">N</span><span
class="small-caps">D</span><span
class="small-caps">S</span></span></span></p><!--l. 43--><p class="noindent" >Some commands are banned in some EAPIs. If a banned command is called, the package manager
must abort the build process indicating an error.
</p>
<div class="table">
<!--l. 46--><p class="noindent" ><a
id="x1-129001r6"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 12.6: </span><span
class="content">Banned commands</span></div><!--tex4ht:label?: x1-129001r6 -->
<div class="tabular">
<table id="TBL-24" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-24-1g"><col
id="TBL-24-1" /><col
id="TBL-24-2" /><col
id="TBL-24-3" /><col
id="TBL-24-4" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-24-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-24-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td colspan="3" style="white-space:nowrap; text-align:center;" id="TBL-24-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Command banned?</span></div></td></tr><tr
style="vertical-align:baseline;" id="TBL-24-2-"><td style="white-space:nowrap; text-align:center;" id="TBL-24-2-1"
class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-24-2-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ectt-1000">dohard</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-24-2-3"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ectt-1000">dosed</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-24-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-24-3-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-24-3-2"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-24-3-3"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-24-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-24-4-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-24-4-2"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-24-4-3"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-24-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-24-5-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-24-5-2"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-24-5-3"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-24-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-24-6-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-24-6-2"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-24-6-3"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-24-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-24-7-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-24-7-2"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-24-7-3"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-24-8-"><td style="white-space:nowrap; text-align:left;" id="TBL-24-8-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h5 class="subsubsectionHead"><a
id="x1-13000012.3.3"></a>Sandbox commands</h5>
<!--l. 65--><p class="nopar" >These commands affect the behaviour of the sandbox. Each command takes a single directory as
argument. Ebuilds must not run any of these commands once the current phase function has
returned.
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">addread</span> </dt><dd
class="description">Add a directory to the permitted read list.
</dd><dt class="description">
<span
class="ecbx-1000">addwrite</span> </dt><dd
class="description">Add a directory to the permitted write list.
</dd><dt class="description">
<span
class="ecbx-1000">addpredict</span> </dt><dd
class="description">Add a directory to the predict list. Any write to a location in this list will be
denied, but will not trigger access violation messages or abort the build process.
</dd><dt class="description">
<span
class="ecbx-1000">adddeny</span> </dt><dd
class="description">Add a directory to the deny list.</dd></dl>
<!--l. 75--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><a
id="x1-13100012.3.3"></a>Package manager query commands</h5>
<!--l. 76--><p class="nopar" >These commands are used to extract information about the host system. Ebuilds must not run any
of these commands in parallel with any other package manager command. Ebuilds must not run
any of these commands once the current phase function has returned.
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">has_version</span> </dt><dd
class="description">Takes exactly one package dependency specification as an argument. Returns
true if a package matching the atom is installed in <span
class="ectt-1000">ROOT</span>, and false otherwise.
</dd><dt class="description">
<span
class="ecbx-1000">best_version</span> </dt><dd
class="description">Takes exactly one package dependency specification as an argument. If a
matching package is installed, prints the category, package name and version of the
highest matching version.</dd></dl>
<!--l. 87--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><a
id="x1-13200012.3.3"></a>Output commands</h5>
<!--l. 88--><p class="nopar" >These commands display messages to the user. Unless otherwise stated, the entire argument list is
used as a message, with backslash-escaped characters interpreted as for the <span
class="ectt-1000">echo -e </span>command of
bash, notably <span
class="ectt-1000">\t </span>for a horizontal tab, <span
class="ectt-1000">\n </span>for a new line, and <span
class="ectt-1000">\\ </span>for a literal backslash. Ebuilds
must not run any of these commands once the current phase function has returned.
Unless otherwise noted, output may be sent to stdout, stderr or some other appropriate
facility.
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">einfo</span> </dt><dd
class="description">Displays an informational message.
</dd><dt class="description">
<span
class="ecbx-1000">einfon</span> </dt><dd
class="description">Displays an informational message without a trailing newline.
</dd><dt class="description">
<span
class="ecbx-1000">elog</span> </dt><dd
class="description">Displays an informational message of slightly higher importance. The package manager
may choose to log <span
class="ectt-1000">elog </span>messages by default where <span
class="ectt-1000">einfo </span>messages are not, for example.
</dd><dt class="description">
<span
class="ecbx-1000">ewarn</span> </dt><dd
class="description">Displays a warning message. Must not go to stdout.
</dd><dt class="description">
<span
class="ecbx-1000">eerror</span> </dt><dd
class="description">Displays an error message. Must not go to stdout.
</dd><dt class="description">
<span
class="ecbx-1000">ebegin</span> </dt><dd
class="description">Displays an informational message. Should be used when beginning a possibly
lengthy process, and followed by a call to <span
class="ectt-1000">eend</span>.
</dd><dt class="description">
<span
class="ecbx-1000">eend</span> </dt><dd
class="description">Indicates that the process begun with an <span
class="ectt-1000">ebegin </span>message has completed. Takes
one fixed argument, which is a numeric return code, and an optional message in all
subsequent arguments. If the first argument is 0, print a success indicator; otherwise,
print the message followed by a failure indicator.</dd></dl>
<!--l. 110--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><a
id="x1-13300012.3.3"></a>Error commands</h5>
<!--l. 111--><p class="nopar" >These commands are used when an error is detected that will prevent the build process from
completing. Ebuilds must not run any of these commands once the current phase function has
returned.
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">die</span> </dt><dd
class="description">Displays a failure message provided in its first and only argument, and then aborts
the build process. <span
class="ectt-1000">die </span>is <span
class="ecti-1000">not </span>guaranteed to work correctly if called from a subshell
environment.
</dd><dt class="description">
<span
class="ecbx-1000">assert</span> </dt><dd
class="description">Checks the value of the shell’s pipe status variable, and if any component is non-zero
(indicating failure), calls <span
class="ectt-1000">die </span>with its first argument as a failure message.</dd></dl>
<!--l. 121--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><a
id="x1-13400012.3.3"></a>Build commands</h5>
<!--l. 122--><p class="nopar" >These commands are used during the <span
class="ectt-1000">src_compile </span>and <span
class="ectt-1000">src_install </span>phases to run the package’s
build commands. Ebuilds must not run any of these commands once the current phase function has
returned.
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">econf</span> </dt><dd
class="description">Calls the program’s <span
class="ectt-1000">./configure </span>script. This is designed to work with GNU
Autoconf-generated scripts. Any additional parameters passed to <span
class="ectt-1000">econf </span>are passed
directly to <span
class="ectt-1000">./configure</span>. <span
class="ectt-1000">econf </span>will look in the current working directory for a
configure script unless the <span
class="ectt-1000">ECONF_SOURCE </span>environment variable is set, in which case it
is taken to be the directory containing it. <span
class="ectt-1000">econf </span>must pass the following options to the
configure script:
<!--l. 133--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">E</span><span
class="small-caps">C</span><span
class="small-caps">O</span><span
class="small-caps">N</span><span
class="small-caps">F</span>-<span
class="small-caps">O</span><span
class="small-caps">P</span><span
class="small-caps">T</span><span
class="small-caps">I</span><span
class="small-caps">O</span><span
class="small-caps">N</span><span
class="small-caps">S</span></span></span></p>
<ul class="itemize1">
<li class="itemize">--prefix must default to <span
class="ectt-1000">${EPREFIX}/usr </span>unless overridden by <span
class="ectt-1000">econf</span>’s caller.
</li>
<li class="itemize">--mandir must be <span
class="ectt-1000">${EPREFIX}/usr/share/man</span>
</li>
<li class="itemize">--infodir must be <span
class="ectt-1000">${EPREFIX}/usr/share/info</span>
</li>
<li class="itemize">--datadir must be <span
class="ectt-1000">${EPREFIX}/usr/share</span>
</li>
<li class="itemize">--sysconfdir must be <span
class="ectt-1000">${EPREFIX}/etc</span>
</li>
<li class="itemize">--localstatedir must be <span
class="ectt-1000">${EPREFIX}/var/lib</span>
</li>
<li class="itemize">--host must be the value of the <span
class="ectt-1000">CHOST </span>environment variable.
</li>
<li class="itemize">--libdir must be set according to Algorithm <a
href="#x1-134002r9">9<!--tex4ht:ref: alg:econf-libdir --></a>.
</li>
<li class="itemize">--disable-dependency-tracking, if the EAPI is listed in table <a
href="#x1-134001r7">12.7<!--tex4ht:ref: tab:econf-options-table --></a> as using it.</li></ul>
<div class="table">
<!--l. 147--><p class="noindent" ><a
id="x1-134001r7"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 12.7: </span><span
class="content">Extra <span
class="ectt-1000">econf </span>arguments for EAPIs</span></div><!--tex4ht:label?: x1-134001r7 -->
<div class="tabular">
<table id="TBL-25" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-25-1g"><col
id="TBL-25-1" /><col
id="TBL-25-2" /><col
id="TBL-25-3" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-25-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-25-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-25-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">--disable-dependency-tracking</span>?</div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-25-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-25-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-25-2-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-25-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-25-3-1"
class="td11"><span
class="ectt-1000">1 </span></td> <td style="white-space:nowrap; text-align:left;" id="TBL-25-3-2"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-25-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-25-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-25-4-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-25-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-25-5-1"
class="td11"><span
class="ectt-1000">3 </span></td> <td style="white-space:nowrap; text-align:left;" id="TBL-25-5-2"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-25-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-25-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-25-6-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-25-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-25-7-1"
class="td11"> </td></tr></table></div></div><hr class="endfloat" />
</div>
<!--l. 162--><p class="noindent" >Note that the <span
class="ectt-1000">${EPREFIX} </span>component represents the same offset-prefix as described in
Table <a
href="#x1-117001r1">12.1<!--tex4ht:ref: tab:defined_vars --></a>. It facilitates offset-prefix installations which is supported by EAPIs listed in
Table <span
class="ecbx-1000">??</span>. When no offset-prefix installation is in effect, <span
class="ectt-1000">EPREFIX </span>becomes the empty string,
making the behaviour of <span
class="ectt-1000">econf </span>equal for both offset-prefix supporting and agnostic
EAPIs.
</p><!--l. 168--><p class="noindent" ><span
class="ectt-1000">econf </span>must be implemented internally—that is, as a bash function and not an external
script. Should any portion of it fail, it must abort the build using <span
class="ectt-1000">die</span>, unless run using
<span
class="ectt-1000">nonfatal</span>, in which case it must return non-zero exit status.
</p>
<div class="algorithm">
<!--l. 173--><p class="noindent" ><a
id="x1-134002r9"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Algorithm 9: </span><span
class="content">econf --libdir logic</span></div><!--tex4ht:label?: x1-134002r9 -->
<div class="algorithmic">
<a
id="x1-134003r99"></a>
<span class="ALCitem"><span class="ecrm-0800"> 1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> let prefix=${EPREFIX}/usr <a
id="x1-134004r100"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">if</span> the caller specified --prefix=$p <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-134005r101"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> let prefix=$p
</span><a
id="x1-134006r102"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span><a
id="x1-134007r103"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> let libdir= <a
id="x1-134008r104"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">if</span> the ABI environment variable is set <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-134009r105"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> let libvar=LIBDIR_$ABI <a
id="x1-134010r106"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 8:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">if</span> the environment variable named by libvar is set <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-134011r107"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 9:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;"> </span> let libdir=the value of the variable named by libvar
</span><a
id="x1-134012r108"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">10:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span>
</span><a
id="x1-134013r109"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">11:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span><a
id="x1-134014r110"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">12:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">if</span> libdir is non-empty <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-134015r111"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">13:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> pass --libdir=$prefix/$libdir to configure
</span><a
id="x1-134016r112"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">14:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span>
</div> </div><hr class="endfloat" />
</div>
</dd><dt class="description">
<span
class="ecbx-1000">emake</span> </dt><dd
class="description">Calls the <span
class="ectt-1000">$MAKE </span>program, or GNU make if the <span
class="ectt-1000">MAKE </span>variable is unset. Any arguments given
are passed directly to the make command, as are the user’s chosen <span
class="ectt-1000">MAKEOPTS</span>. Arguments
given to <span
class="ectt-1000">emake </span>override user configuration. See also section <a
href="#x1-12500012.3.1">12.3.1<!--tex4ht:ref: sec:guaranteed-system-commands --></a>. <span
class="ectt-1000">emake </span>must be an
external program and cannot be a function or alias—it must be callable from e.g. <span
class="ectt-1000">xargs</span>.
Failure behaviour is EAPI dependent as per section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">einstall</span> </dt><dd
class="description">A shortcut for the command given in Listing <a
href="#x1-134017r2">12.2<!--tex4ht:ref: lst:einstall --></a>. Any arguments given to <span
class="ectt-1000">einstall </span>are
passed verbatim to <span
class="ectt-1000">emake</span>, as shown. Failure behaviour is EAPI dependent as per
section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
<!--l. 202--><p class="noindent" >The variable <span
class="ectt-1000">ED </span>is defined as in Table <a
href="#x1-117001r1">12.1<!--tex4ht:ref: tab:defined_vars --></a> and depends on the use of an offset-prefix.
When such offset-prefix is absent, <span
class="ectt-1000">ED </span>is equivalent to <span
class="ectt-1000">D</span>. <span
class="ectt-1000">ED </span>is always available in
EAPIs that support offset-prefix installations as listed in Table <a
href="#x1-117009r3">12.3<!--tex4ht:ref: tab:offset-env-vars-table --></a>, hence EAPIs
lacking offset-prefix support should use <span
class="ectt-1000">D </span>instead of <span
class="ectt-1000">ED </span>in the command given in
Listing <a
href="#x1-134017r2">12.2<!--tex4ht:ref: lst:einstall --></a>.
</p><!--l. 207--><p class="noindent" ><a
id="x1-134017r2"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Listing 12.2: </span><span
class="content">einstall command</span></div><!--tex4ht:label?: x1-134017r2 -->
<div class="verbatim" id="verbatim-13">
emake \
 <br />   prefix="${ED}"/usr \
 <br />   mandir="${ED}"/usr/share/man \
 <br />   infodir="${ED}"/usr/share/info \
 <br />   libdir="${ED}"/usr/$(get_libdir) \
 <br />   "$@" \
 <br />   install
 <br />  </div>
<!--l. 217--><p class="nopar" ></p></div><hr class="endfloat" />
</dd></dl>
<!--l. 222--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><a
id="x1-13500012.3.3"></a>Installation commands</h5>
<!--l. 223--><p class="nopar" >These commands are used to install files into the staging area, in cases where the package’s <span
class="ectt-1000">make</span>
<span
class="ectt-1000">install </span>target cannot be used or does not install all needed files. Except where otherwise stated,
all filenames created or modified are relative to the staging directory including the offset-prefix <span
class="ectt-1000">ED</span>
in offset-prefix aware EAPIs, or just the staging directory <span
class="ectt-1000">D </span>in offset-prefix agnostic EAPIs. These
commands must all be external programs and not bash functions or aliases—that is, they must be
callable from <span
class="ectt-1000">xargs</span>. Ebuilds must not run any of these commands once the current phase function
has returned.
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">dobin</span> </dt><dd
class="description">Installs the given files into <span
class="ectt-1000">DESTTREE/bin</span>, where <span
class="ectt-1000">DESTTREE </span>defaults to <span
class="ectt-1000">/usr</span>. Gives
the files mode <span
class="ectt-1000">0755 </span>and transfers file ownership to the superuser or its equivalent on
the system or installation at hand. For instance on Gentoo Linux in a non-offset-prefix
installation this ownership is <span
class="ectt-1000">root:root</span>, while on an offset-prefix aware installation
this may be <span
class="ectt-1000">joe:users</span>. Failure behaviour is EAPI dependent as per section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">doconfd</span> </dt><dd
class="description">Installs the given config files into <span
class="ectt-1000">/etc/conf.d/</span>, by default with file mode <span
class="ectt-1000">0644</span>.
This can be overridden by setting <span
class="ectt-1000">INSOPTIONS </span>with the <span
class="ectt-1000">insopts </span>function. Failure
behaviour is EAPI dependent as per section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">dodir</span> </dt><dd
class="description">Creates the given directories, by default with file mode <span
class="ectt-1000">0755</span>. This can be overridden
by setting <span
class="ectt-1000">DIROPTIONS </span>with the <span
class="ectt-1000">diropts </span>function. Failure behaviour is EAPI
dependent as per section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">dodoc</span> </dt><dd
class="description"><!--l. 249--><p class="noindent" > </p><!--l. 249--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">D</span><span
class="small-caps">O</span><span
class="small-caps">D</span><span
class="small-caps">O</span><span
class="small-caps">C</span></span></span> Installs the given files into a subdirectory under <span
class="ectt-1000">/usr/share/doc/${PF}/ </span>with file
mode <span
class="ectt-1000">0644</span>. The subdirectory is set by the most recent call to <span
class="ectt-1000">docinto</span>. If <span
class="ectt-1000">docinto</span>
has not yet been called, instead installs to the directory <span
class="ectt-1000">/usr/share/doc/${PF}/</span>. For
EAPIs listed in table <a
href="#x1-135018r8">12.8<!--tex4ht:ref: tab:dodoc-table --></a> as supporting <span
class="ectt-1000">-r</span>, if the first argument is <span
class="ectt-1000">-r</span>, any subsequent
arguments that are directories are installed recursively to the appropriate location; in
any other case, it is an error for a directory to be specified. Failure behaviour is EAPI
dependent as per section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</p></dd><dt class="description">
<span
class="ecbx-1000">doenvd</span> </dt><dd
class="description">Installs the given environment files into <span
class="ectt-1000">/etc/env.d/</span>, by default with file mode
<span
class="ectt-1000">0644</span>. This can be overridden by setting <span
class="ectt-1000">INSOPTIONS </span>with the <span
class="ectt-1000">insopts </span>function. Failure
behaviour is EAPI dependent as per section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">doexe</span> </dt><dd
class="description">Installs the given files into the directory specified by the most recent <span
class="ectt-1000">exeinto </span>call,
by default with file mode <span
class="ectt-1000">0755</span>. This can be overridden by setting <span
class="ectt-1000">EXEOPTIONS </span>with the
<span
class="ectt-1000">exeopts </span>function. If <span
class="ectt-1000">exeinto </span>has not yet been called, behaviour is undefined. Failure
behaviour is EAPI dependent as per section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">dohard</span> </dt><dd
class="description">Takes two parameters. Creates a hardlink from the second to the first. In EAPIs
listed in table <a
href="#x1-129001r6">12.6<!--tex4ht:ref: tab:banned-commands-table --></a>, this command is banned as per section <a
href="#x1-12900012.3.3">12.3.3<!--tex4ht:ref: sec:banned-commands --></a>. Failure behaviour
is EAPI dependent as per section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">dohtml</span> </dt><dd
class="description">Installs the given HTML files into a subdirectory under <span
class="ectt-1000">/usr/share/doc/$PF/</span>. The
subdirectory is <span
class="ectt-1000">html </span>by default, but this can be overridden by setting the <span
class="ectt-1000">DOCDESTTREE</span>
variable with the <span
class="ectt-1000">docinto </span>function. Files to be installed automatically are determined by
extension and the default extensions are <span
class="ectt-1000">css</span>, <span
class="ectt-1000">gif</span>, <span
class="ectt-1000">htm</span>, <span
class="ectt-1000">html</span>, <span
class="ectt-1000">jpeg</span>, <span
class="ectt-1000">jpg</span>, <span
class="ectt-1000">js </span>and <span
class="ectt-1000">png</span>. These
default extensions can be extended or reduced (see below). The options that can be passed to
<span
class="ectt-1000">dohtml </span>are as follows:
<dl class="description"><dt class="description">
</dt><dd
class="description"><span
class="ectt-1000">-r </span>— enables recursion into directories.
</dd><dt class="description">
</dt><dd
class="description"><span
class="ectt-1000">-V </span>— enables verbosity.
</dd><dt class="description">
</dt><dd
class="description"><span
class="ectt-1000">-A </span>— adds file type extensions to the default list.
</dd><dt class="description">
</dt><dd
class="description"><span
class="ectt-1000">-a </span>— sets file type extensions to only those specified.
</dd><dt class="description">
</dt><dd
class="description"><span
class="ectt-1000">-f </span>— list of files that are able to be installed.
</dd><dt class="description">
</dt><dd
class="description"><span
class="ectt-1000">-x </span>— list of directories that files will not be installed from (only used in conjunction
with <span
class="ectt-1000">-r</span>).
</dd><dt class="description">
</dt><dd
class="description"><span
class="ectt-1000">-p </span>— sets a document prefix for installed files, not to be confused with the global
offset-prefix.</dd></dl>
<!--l. 289--><p class="noindent" >Failure behaviour is EAPI dependent as per section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</p><!--l. 291--><p class="noindent" >It is undefined whether a failure shall occur if <span
class="ectt-1000">-r </span>is not specified and a directory is
encountered. Ebuilds must not rely upon any particular behaviour.
</p></dd><dt class="description">
<span
class="ecbx-1000">doinfo</span> </dt><dd
class="description">Installs a GNU Info file into the <span
class="ectt-1000">/usr/share/info </span>area with file mode <span
class="ectt-1000">0644</span>. Failure
behaviour is EAPI dependent as per section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">doinitd</span> </dt><dd
class="description">Installs the given initscript files into <span
class="ectt-1000">/etc/init.d</span>, by default with file mode <span
class="ectt-1000">0755</span>. This
can be overridden by setting <span
class="ectt-1000">EXEOPTIONS </span>with the <span
class="ectt-1000">exeopts </span>function. Failure behaviour is
EAPI dependent as per section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">doins</span> </dt><dd
class="description"><!--l. 301--><p class="noindent" > </p><!--l. 301--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">D</span><span
class="small-caps">O</span><span
class="small-caps">I</span><span
class="small-caps">N</span><span
class="small-caps">S</span></span></span> Takes any number of files as arguments and installs them into <span
class="ectt-1000">INSDESTTREE</span>, by default
with file mode <span
class="ectt-1000">0644</span>. This can be overridden by setting <span
class="ectt-1000">INSOPTIONS </span>with the <span
class="ectt-1000">insopts</span>
function. If the first argument is <span
class="ectt-1000">-r</span>, then operates recursively, descending into any directories
given. For EAPIs listed in table <a
href="#x1-135019r9">12.9<!--tex4ht:ref: tab:doins-table --></a>, <span
class="ectt-1000">doins </span>must install symlinks as symlinks; for other
EAPIs, behaviour is undefined if any symlink is encountered. Failure behaviour is EAPI
dependent as per section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</p></dd><dt class="description">
<span
class="ecbx-1000">dolib</span> </dt><dd
class="description">For each argument, installs it into the appropriate library directory as determined by
Algorithm <a
href="#x1-135001r10">10<!--tex4ht:ref: alg:ebuild-libdir --></a>, by default with file mode <span
class="ectt-1000">0644</span>. This can be overridden by setting <span
class="ectt-1000">LIBOPTIONS</span>
with the <span
class="ectt-1000">libopts </span>function. Any symlinks are installed into the same directory as
relative links to their original target. Failure behaviour is EAPI dependent as per
section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">dolib.so</span> </dt><dd
class="description">As for dolib except each file is installed with mode <span
class="ectt-1000">0755</span>.
</dd><dt class="description">
<span
class="ecbx-1000">dolib.a</span> </dt><dd
class="description">As for dolib except each file is installed with mode <span
class="ectt-1000">0644</span>.
<div class="algorithm">
<!--l. 320--><p class="noindent" ><a
id="x1-135001r10"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Algorithm 10: </span><span
class="content">Determining the library directory</span></div><!--tex4ht:label?: x1-135001r10 -->
<div class="algorithmic">
<a
id="x1-135002r113"></a>
<span class="ALCitem"><span class="ecrm-0800"> 1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">if</span> CONF_LIBDIR_OVERRIDE is set in the environment <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-135003r114"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> return CONF_LIBDIR_OVERRIDE
</span><a
id="x1-135004r115"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span><a
id="x1-135005r116"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">if</span> CONF_LIBDIR is set in the environment <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-135006r117"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> let LIBDIR_default=CONF_LIBDIR
</span><a
id="x1-135007r118"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">else</span><span class="else-body">
<a
id="x1-135008r119"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> let LIBDIR_default=“lib”
</span><a
id="x1-135009r120"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 8:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span><a
id="x1-135010r121"></a>
<br /><span class="ALCitem"><span class="ecrm-0800"> 9:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">if</span> ABI is set in the environment <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-135011r122"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">10:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> let abi=ABI
</span><a
id="x1-135012r123"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">11:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">else</span> <span
class="ecbx-1000">if</span> DEFAULT_ABI is set in the environment <span
class="ecbx-1000">then</span><span class="if-body">
<a
id="x1-135013r124"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">12:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> let abi=DEFAULT_ABI
</span><a
id="x1-135014r125"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">13:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">else</span><span class="else-body">
<a
id="x1-135015r126"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">14:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;"> </span> let abi=“default”
</span><a
id="x1-135016r127"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">15:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> <span
class="ecbx-1000">end</span> <span
class="ecbx-1000">if</span><a
id="x1-135017r128"></a>
<br /><span class="ALCitem"><span
class="ecrm-0800">16:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;"> </span> return the value of LIBDIR_$abi
</div> </div><hr class="endfloat" />
</div>
</dd><dt class="description">
<span
class="ecbx-1000">doman</span> </dt><dd
class="description">Installs a man page into the appropriate subdirectory of <span
class="ectt-1000">/usr/share/man </span>depending upon
its apparent section suffix (e.g. <span
class="ectt-1000">foo.1 </span>goes to <span
class="ectt-1000">/usr/share/man/man1/foo.1 </span>with file mode
<span
class="ectt-1000">0644</span>.
<!--l. 345--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">D</span><span
class="small-caps">O</span><span
class="small-caps">M</span><span
class="small-caps">A</span><span
class="small-caps">N</span>-<span
class="small-caps">L</span><span
class="small-caps">A</span><span
class="small-caps">N</span><span
class="small-caps">G</span><span
class="small-caps">S</span></span></span></p><!--l. 345--><p class="noindent" >In EAPIs listed in table <a
href="#x1-135020r10">12.10<!--tex4ht:ref: tab:doman-table --></a> as supporting language codes, a man page with name of the
form<span
class="ectt-1000">foo.lang.1 </span>shall go to <span
class="ectt-1000">/usr/share/man/lang/man1/foo.1</span>, where <span
class="ectt-1000">lang </span>refers
to a pair of lower-case ASCII letters optionally followed by an underscore and a
pair of upper-case ASCII letters. Failure behaviour is EAPI dependent as per
section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</p></dd><dt class="description">
<span
class="ecbx-1000">domo</span> </dt><dd
class="description">Installs a <span
class="ectt-1000">.mo </span>file with file mode <span
class="ectt-1000">0644 </span>into the appropriate subdirectory of
<span
class="ectt-1000">DESTTREE/share/locale</span>, generated by taking the basename of the file, removing the
<span
class="ectt-1000">.* </span>suffix, and appending <span
class="ectt-1000">/LC_MESSAGES</span>. The name of the installed files is the
package name with <span
class="ectt-1000">.mo </span>appended. Failure behaviour is EAPI dependent as per
section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">dosbin</span> </dt><dd
class="description">As <span
class="ectt-1000">dobin</span>, but installs to <span
class="ectt-1000">DESTTREE/sbin</span>.
</dd><dt class="description">
<span
class="ecbx-1000">dosym</span> </dt><dd
class="description">Creates a symbolic link named as for its second parameter, pointing to the first. If the
directory containing the new link does not exist, creates it. Failure behaviour is EAPI
dependent as per section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">fowners</span> </dt><dd
class="description">Acts as for <span
class="ectt-1000">chown</span>, but takes paths relative to the image directory. Failure behaviour is
EAPI dependent as per section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">fperms</span> </dt><dd
class="description">Acts as for <span
class="ectt-1000">chmod</span>, but takes paths relative to the image directory. Failure behaviour is
EAPI dependent as per section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">newbin</span> </dt><dd
class="description">As for <span
class="ectt-1000">dobin</span>, but takes two parameters. The first is the file to install; the second is the
new filename under which it will be installed.
</dd><dt class="description">
<span
class="ecbx-1000">newconfd</span> </dt><dd
class="description">As for <span
class="ectt-1000">doconfd</span>, but takes two parameters as for <span
class="ectt-1000">newbin</span>.
</dd><dt class="description">
<span
class="ecbx-1000">newdoc</span> </dt><dd
class="description">As above, for <span
class="ectt-1000">dodoc</span>.
</dd><dt class="description">
<span
class="ecbx-1000">newenvd</span> </dt><dd
class="description">As above, for <span
class="ectt-1000">doenvd</span>.
</dd><dt class="description">
<span
class="ecbx-1000">newexe</span> </dt><dd
class="description">As above, for <span
class="ectt-1000">doexe</span>.
</dd><dt class="description">
<span
class="ecbx-1000">newinitd</span> </dt><dd
class="description">As above, for <span
class="ectt-1000">doinitd</span>.
</dd><dt class="description">
<span
class="ecbx-1000">newins</span> </dt><dd
class="description">As above, for <span
class="ectt-1000">doins</span>.
</dd><dt class="description">
<span
class="ecbx-1000">newlib.a</span> </dt><dd
class="description">As above, for <span
class="ectt-1000">dolib.a</span>.
</dd><dt class="description">
<span
class="ecbx-1000">newlib.so</span> </dt><dd
class="description">As above, for <span
class="ectt-1000">dolib.so</span>.
</dd><dt class="description">
<span
class="ecbx-1000">newman</span> </dt><dd
class="description">As above, for <span
class="ectt-1000">doman</span>.
</dd><dt class="description">
<span
class="ecbx-1000">newsbin</span> </dt><dd
class="description">As above, for <span
class="ectt-1000">dosbin</span>.
</dd><dt class="description">
<span
class="ecbx-1000">keepdir</span> </dt><dd
class="description">Creates a directory as for <span
class="ectt-1000">dodir</span>, and an empty file whose name starts with <span
class="ectt-1000">.keep </span>in that
directory to ensure that the directory does not get removed by the package manager
should it be empty at any point. Failure behaviour is EAPI dependent as per
section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</dd></dl>
<div class="table">
<!--l. 398--><p class="noindent" ><a
id="x1-135018r8"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 12.8: </span><span
class="content">EAPIs supporting <span
class="ectt-1000">dodoc -r</span></span></div><!--tex4ht:label?: x1-135018r8 -->
<div class="tabular">
<table id="TBL-26" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-26-1g"><col
id="TBL-26-1" /><col
id="TBL-26-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-26-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-26-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-26-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports </span><span
class="ectt-1000">dodoc -r</span><span
class="ecbx-1000">?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-26-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-26-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-26-2-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-26-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-26-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-26-3-2"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-26-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-26-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-26-4-2"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-26-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-26-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-26-5-2"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-26-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-26-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-26-6-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-26-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-26-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<div class="table">
<!--l. 413--><p class="noindent" ><a
id="x1-135019r9"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 12.9: </span><span
class="content">EAPIs supporting symlinks for <span
class="ectt-1000">doins</span></span></div><!--tex4ht:label?: x1-135019r9 -->
<div class="tabular">
<table id="TBL-27" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-27-1g"><col
id="TBL-27-1" /><col
id="TBL-27-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-27-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-27-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-27-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ectt-1000">doins </span><span
class="ecbx-1000">supports symlinks?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-27-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-27-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-27-2-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-27-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-27-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-27-3-2"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-27-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-27-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-27-4-2"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-27-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-27-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-27-5-2"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-27-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-27-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-27-6-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-27-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-27-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<div class="table">
<!--l. 428--><p class="noindent" ><a
id="x1-135020r10"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 12.10: </span><span
class="content">EAPIs supporting <span
class="ectt-1000">doman </span>languages</span></div><!--tex4ht:label?: x1-135020r10 -->
<div class="tabular">
<table id="TBL-28" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-28-1g"><col
id="TBL-28-1" /><col
id="TBL-28-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-28-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-28-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-28-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports </span><span
class="ectt-1000">doman </span><span
class="ecbx-1000">languages?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-28-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-28-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-28-2-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-28-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-28-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-28-3-2"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-28-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-28-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-28-4-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-28-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-28-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-28-5-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-28-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-28-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-28-6-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-28-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-28-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h5 class="subsubsectionHead"><a
id="x1-13600012.3.3"></a>Commands affecting install destinations</h5>
<!--l. 444--><p class="nopar" >The following commands are used to set the various destination trees, all relative to <span
class="ectt-1000">${ED} </span>in
offset-prefix aware EAPIs and relative to <span
class="ectt-1000">${D} </span>in offset-prefix agnostic EAPIs, used by the above
installation commands. They must be shell functions or aliases, due to the need to set variables
read by the above commands. Ebuilds must not run any of these commands once the current phase
function has returned.
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">into</span> </dt><dd
class="description">Sets the value of <span
class="ectt-1000">DESTTREE </span>for future invocations of the above utilities. Creates the
directory under <span
class="ectt-1000">${ED} </span>in offset-prefix aware EAPIs or under <span
class="ectt-1000">${D} </span>in offset-prefix
agnostic EAPIs, using <span
class="ectt-1000">install -d </span>with no additional options, if it does not already
exist. Failure behaviour is EAPI dependent as per section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">insinto</span> </dt><dd
class="description">Sets the value of <span
class="ectt-1000">INSDESTTREE </span>for future invocations of the above utilities. May
create the directory, as specified for <span
class="ectt-1000">into</span>.
</dd><dt class="description">
<span
class="ecbx-1000">exeinto</span> </dt><dd
class="description">Sets the install path for <span
class="ectt-1000">doexe </span>and <span
class="ectt-1000">newexe</span>. May create the directory, as specified
for <span
class="ectt-1000">into</span>.
</dd><dt class="description">
<span
class="ecbx-1000">docinto</span> </dt><dd
class="description">Sets the install subdirectory for <span
class="ectt-1000">dodoc </span>et al. May create the directory, as specified
for <span
class="ectt-1000">into</span>.
</dd><dt class="description">
<span
class="ecbx-1000">insopts</span> </dt><dd
class="description">Sets the options passed by <span
class="ectt-1000">doins </span>et al. to the <span
class="ectt-1000">install </span>command.
</dd><dt class="description">
<span
class="ecbx-1000">diropts</span> </dt><dd
class="description">Sets the options passed by <span
class="ectt-1000">dodir </span>et al. to the <span
class="ectt-1000">install </span>command.
</dd><dt class="description">
<span
class="ecbx-1000">exeopts</span> </dt><dd
class="description">Sets the options passed by <span
class="ectt-1000">doexe </span>et al. to the <span
class="ectt-1000">install </span>command.
</dd><dt class="description">
<span
class="ecbx-1000">libopts</span> </dt><dd
class="description">Sets the options passed by <span
class="ectt-1000">dolib </span>et al. to the <span
class="ectt-1000">install </span>command.
</dd></dl>
<!--l. 478--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><a
id="x1-13700012.3.3"></a>Commands affecting install compression</h5>
<!--l. 480--><p class="nopar" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">C</span><span
class="small-caps">O</span><span
class="small-caps">N</span><span
class="small-caps">T</span><span
class="small-caps">R</span><span
class="small-caps">O</span><span
class="small-caps">L</span><span
class="small-caps">L</span><span
class="small-caps">A</span><span
class="small-caps">B</span><span
class="small-caps">L</span><span
class="small-caps">E</span>-<span
class="small-caps">C</span><span
class="small-caps">O</span><span
class="small-caps">M</span><span
class="small-caps">P</span><span
class="small-caps">R</span><span
class="small-caps">E</span><span
class="small-caps">S</span><span
class="small-caps">S</span></span></span></p><!--l. 480--><p class="noindent" >In EAPIs listed in table <a
href="#x1-137001r11">12.11<!--tex4ht:ref: tab:compression-table --></a> as supporting controllable compression, the package manager may
optionally compress a subset of the files under the <span
class="ectt-1000">ED </span>directory in offset-prefix aware EAPIs or the
<span
class="ectt-1000">D </span>directory in offset-prefix agnostic EAPIs. To control which directories may or may not be
compressed, the package manager shall maintain two lists:
</p><!--l. 487--><p class="noindent" >
</p><ul>
<li class="compactitem">An inclusion list, which initially contains <span
class="ectt-1000">/usr/share/doc</span>, <span
class="ectt-1000">/usr/share/info </span>and
<span
class="ectt-1000">/usr/share/man</span>.
</li>
<li class="compactitem">An exclusion list, which initially contains <span
class="ectt-1000">/usr/share/doc/${PF}/html</span>.</li></ul>
<!--l. 492--><p class="noindent" >The optional compression shall be carried out after <span
class="ectt-1000">src_install </span>has completed, and before the
execution of any subsequent phase function. For each item in the inclusion list, pretend it has the
value of the <span
class="ectt-1000">ED </span>variable in offset-prefix aware EAPIs or the <span
class="ectt-1000">D </span>variable in offset-prefix agnostic
EAPIs prepended, then:
</p><!--l. 498--><p class="noindent" >
</p><ul>
<li class="compactitem">If it is a directory, act as if every file or directory immediately under this directory
were in the inclusion list.
</li>
<li class="compactitem">If the item is a file, it may be compressed unless it has been excluded as described
below.
</li>
<li class="compactitem">If the item does not exist, it is ignored.</li></ul>
<!--l. 504--><p class="noindent" >Whether an item is to be excluded is determined as follows: For each item in the exclusion list,
pretend it has the value of the <span
class="ectt-1000">ED </span>variable in offset-prefix aware EAPIs or the <span
class="ectt-1000">D </span>variable in
offset-prefix agnostic EAPIs prepended, then:
</p><!--l. 509--><p class="noindent" >
</p><ul>
<li class="compactitem">If it is a directory, act as if every file or directory immediately under this directory
were in the exclusion list.
</li>
<li class="compactitem">If the item is a file, it shall not be compressed.
</li>
<li class="compactitem">If the item does not exist, it is ignored.</li></ul>
<!--l. 515--><p class="noindent" >The package manager shall take appropriate steps to ensure that its compression mechanisms
behave sensibly even if an item is listed in the inclusion list multiple times, if an item is a symlink,
or if a file is already compressed.
</p><!--l. 519--><p class="noindent" >The following commands may be used in <span
class="ectt-1000">src_install </span>to alter these lists. It is an error to call any
of these functions from any other phase.
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">docompress</span> </dt><dd
class="description">If the first argument is <span
class="ectt-1000">-x</span>, add each of its subsequent arguments to the
exclusion list. Otherwise, add each argument to the inclusion list. Only available in
EAPIs listed in table <a
href="#x1-137001r11">12.11<!--tex4ht:ref: tab:compression-table --></a> as supporting <span
class="ectt-1000">docompress</span>.</dd></dl>
<div class="table">
<!--l. 528--><p class="noindent" ><a
id="x1-137001r11"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 12.11: </span><span
class="content">EAPIs supporting controllable compression</span></div><!--tex4ht:label?: x1-137001r11 -->
<div class="tabular">
<table id="TBL-29" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-29-1g"><col
id="TBL-29-1" /><col
id="TBL-29-2" /><col
id="TBL-29-3" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-29-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-29-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-29-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports controllable compression?</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-29-1-3"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports </span><span
class="ectt-1000">docompress</span><span
class="ecbx-1000">?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-29-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-29-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-29-2-2"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-29-2-3"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-29-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-29-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-29-3-2"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-29-3-3"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-29-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-29-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-29-4-2"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-29-4-3"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-29-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-29-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-29-5-2"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-29-5-3"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-29-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-29-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-29-6-2"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-29-6-3"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-29-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-29-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h5 class="subsubsectionHead"><a
id="x1-13800012.3.3"></a>Use List Functions</h5>
<!--l. 545--><p class="nopar" >These functions provide behaviour based upon set or unset use flags. Ebuilds must not run any of
these commands once the current phase function has returned. Ebuilds must not run any of these
functions in global scope.
</p><!--l. 549--><p class="noindent" >If any of these functions is called with a flag value that is not included in <span
class="ectt-1000">IUSE_EFFECTIVE</span>, either
behaviour is undefined or it is an error as decided by table <a
href="#x1-138001r12">12.12<!--tex4ht:ref: tab:use-list-strictness --></a>.
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">use</span> </dt><dd
class="description">Returns shell true (0) if the first argument (a <span
class="ectt-1000">USE </span>flag name) is enabled, false otherwise.
If the flag name is prefixed with <span
class="ectt-1000">!</span>, returns true if the flag is disabled, and false if it is
enabled. It is guaranteed that this command is quiet.
</dd><dt class="description">
<span
class="ecbx-1000">usev</span> </dt><dd
class="description">The same as <span
class="ectt-1000">use</span>, but also prints the flag name if the condition is met.
</dd><dt class="description">
<span
class="ecbx-1000">useq</span> </dt><dd
class="description">Deprecated synonym for <span
class="ectt-1000">use</span>.
</dd><dt class="description">
<span
class="ecbx-1000">use_with</span> </dt><dd
class="description">Has one-, two-, and three-argument forms. The first argument is a USE flag
name, the second a <span
class="ectt-1000">configure </span>option name (<span
class="ectt-1000">${opt}</span>), defaulting to the same as the
first argument if not provided, and the third is a string value (<span
class="ectt-1000">${value}</span>), defaulting to
nothing. If the USE flag is set, outputs <span
class="ectt-1000">--with-${opt}=${value} </span>if the third argument
was provided, and <span
class="ectt-1000">--with-${opt} </span>otherwise. If the flag is not set, then it outputs
<span
class="ectt-1000">--without-${opt}</span>.
</dd><dt class="description">
<span
class="ecbx-1000">use_enable</span> </dt><dd
class="description">Works the same as <span
class="ectt-1000">use_with()</span>, but outputs <span
class="ectt-1000">--enable- </span>or <span
class="ectt-1000">--disable-</span>
instead of <span
class="ectt-1000">--with- </span>or <span
class="ectt-1000">--without-</span>.</dd></dl>
<div class="table">
<!--l. 568--><p class="noindent" ><a
id="x1-138001r12"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 12.12: </span><span
class="content">EAPI Behaviour for Use Queries not in IUSE_EFFECTIVE</span></div><!--tex4ht:label?: x1-138001r12 -->
<div class="tabular">
<table id="TBL-30" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-30-1g"><col
id="TBL-30-1" /><col
id="TBL-30-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-30-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-30-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-30-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Behaviour</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-30-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-30-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-30-2-2"
class="td11">Undefined </td></tr><tr
style="vertical-align:baseline;" id="TBL-30-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-30-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-30-3-2"
class="td11">Undefined</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-30-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-30-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-30-4-2"
class="td11">Undefined </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-30-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-30-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-30-5-2"
class="td11">Undefined </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-30-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-30-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-30-6-2"
class="td11">Error </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-30-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-30-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h5 class="subsubsectionHead"><a
id="x1-13900012.3.3"></a>Text List Functions</h5>
<!--l. 584--><p class="nopar" >These functions check whitespace-separated lists for a particular value.
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">has</span> </dt><dd
class="description">Returns shell true (0) if the first argument (a word) is found in the list of subsequent
arguments, false otherwise. Guaranteed quiet.
</dd><dt class="description">
<span
class="ecbx-1000">hasv</span> </dt><dd
class="description">The same as <span
class="ectt-1000">has</span>, but also prints the first argument if found.
</dd><dt class="description">
<span
class="ecbx-1000">hasq</span> </dt><dd
class="description">Deprecated synonym for <span
class="ectt-1000">has</span>.</dd></dl>
<!--l. 593--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><a
id="x1-14000012.3.3"></a>Misc Commands</h5>
<!--l. 594--><p class="nopar" >The following commands are always available in the ebuild environment, but don’t really fit in any
of the above categories. Ebuilds must not run any of these commands once the current phase
function has returned.
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">dosed</span> </dt><dd
class="description">Takes any number of arguments, which can be files or <span
class="ectt-1000">sed </span>expressions. For each
argument, if it names, relative to <span
class="ectt-1000">ED </span>(offset-prefix aware EAPIs) or <span
class="ectt-1000">D </span>(offset-prefix
agnostic EAPIs) a file which exists, then <span
class="ectt-1000">sed </span>is run with the current expression on that
file. Otherwise, the current expression is set to the text of the argument. The initial
value of the expression is <span
class="ectt-1000">s:${ED}::g </span>in offset-prefix aware EAPIs and <span
class="ectt-1000">s:${D}::g </span>in
offset-prefix agnostic EAPIs. In EAPIs listed in table <a
href="#x1-129001r6">12.6<!--tex4ht:ref: tab:banned-commands-table --></a>, this command is banned
as per section <a
href="#x1-12900012.3.3">12.3.3<!--tex4ht:ref: sec:banned-commands --></a>. Failure behaviour is EAPI dependent as per section <a
href="#x1-12800012.3.3">12.3.3<!--tex4ht:ref: sec:failure-behaviour --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">unpack</span> </dt><dd
class="description">Unpacks one or more source archives, in order, into the current directory. After
unpacking, must ensure that all filesystem objects inside the current working directory
(but not the current working directory itself) have permissions <span
class="ectt-1000">a+r,u+w,go-w </span>and that
all directories under the current working directory additionally have permissions <span
class="ectt-1000">a+x</span>.
<!--l. 613--><p class="noindent" >All arguments to <span
class="ectt-1000">unpack </span>must be either a filename without path, in which case <span
class="ectt-1000">unpack</span>
looks in <span
class="ectt-1000">DISTDIR </span>for the file, or start with the string <span
class="ectt-1000">./</span>, in which case <span
class="ectt-1000">unpack </span>uses the
argument as a path relative to the working directory.
</p><!--l. 617--><p class="noindent" >Any unrecognised file format shall be skipped silently. If unpacking a supported file
format fails, <span
class="ectt-1000">unpack </span>shall abort the build process.
</p><!--l. 620--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">U</span><span
class="small-caps">N</span><span
class="small-caps">P</span><span
class="small-caps">A</span><span
class="small-caps">C</span><span
class="small-caps">K</span>-<span
class="small-caps">E</span><span
class="small-caps">X</span><span
class="small-caps">T</span><span
class="small-caps">E</span><span
class="small-caps">N</span><span
class="small-caps">S</span><span
class="small-caps">I</span><span
class="small-caps">O</span><span
class="small-caps">N</span><span
class="small-caps">S</span></span></span></p><!--l. 620--><p class="noindent" >Must be able to unpack the following file formats, if the relevant binaries are available:
</p>
<ul class="itemize1">
<li class="itemize">tar files (<span
class="ectt-1000">*.tar</span>). Ebuilds must ensure that GNU tar installed.
</li>
<li class="itemize">gzip-compressed tar files (<span
class="ectt-1000">*.tar.gz, *.tgz, *.tar.Z, *.tbz</span>). Ebuilds must
ensure that GNU gzip and GNU tar are installed.
</li>
<li class="itemize">bzip2-compressed tar files (<span
class="ectt-1000">*.tar.bz2, *.tbz2, *.tar.bz</span>). Ebuilds must
ensure that bzip2 and GNU tar are installed.
</li>
<li class="itemize">zip files (<span
class="ectt-1000">*.zip, *.ZIP, *.jar</span>). Ebuilds must ensure that Info-ZIP Unzip is
installed.
</li>
<li class="itemize">gzip files (<span
class="ectt-1000">*.gz, *.Z, *.z</span>). Ebuilds must ensure that GNU gzip is installed.
</li>
<li class="itemize">bzip2 files (<span
class="ectt-1000">*.bz, *.bz2</span>). Ebuilds must ensure that bzip2 is installed.
</li>
<li class="itemize">7zip files (<span
class="ectt-1000">*.7z, *.7Z</span>). Ebuilds must ensure that P7ZIP is installed.
</li>
<li class="itemize">rar files (<span
class="ectt-1000">*.rar, *.RAR</span>). Ebuilds must ensure that RARLAB’s unrar is installed.
</li>
<li class="itemize">LHA archives (<span
class="ectt-1000">*.LHA, *.LHa, *.lha, *.lhz</span>). Ebuilds must ensure that the lha
program is installed.
</li>
<li class="itemize">ar archives (<span
class="ectt-1000">*.a</span>). Ebuilds must ensure that GNU binutils is installed.
</li>
<li class="itemize">deb packages (<span
class="ectt-1000">*.deb</span>). Ebuilds must ensure that the deb2targz program is installed
on those platforms where the GNU binutils ar program is not available and the
installed ar program is incompatible with GNU archives. Otherwise, ebuilds must
ensure that GNU binutils is installed.
</li>
<li class="itemize">lzma-compressed files (<span
class="ectt-1000">*.lzma</span>). Ebuilds must ensure that LZMA Utils is installed.
</li>
<li class="itemize">lzma-compressed tar files (<span
class="ectt-1000">*.tar.lzma</span>). Ebuilds must ensure that LZMA Utils
and GNU tar are installed.
</li>
<li class="itemize">xz-compressed files (<span
class="ectt-1000">*.xz</span>). Ebuilds must ensure that XZ Utils is installed. Only
for EAPIs listed in table <a
href="#x1-140001r13">12.13<!--tex4ht:ref: tab:unpack-extensions-table --></a> as supporting xz.
</li>
<li class="itemize">xz-compressed tar files (<span
class="ectt-1000">*.tar.xz</span>). Ebuilds must ensure that XZ Utils and GNU
tar are installed. Only for EAPIs listed in table <a
href="#x1-140001r13">12.13<!--tex4ht:ref: tab:unpack-extensions-table --></a> as supporting xz.</li></ul>
<!--l. 647--><p class="nopar" >It is up to the ebuild to ensure that the relevant external utilities are available, whether by
being in the system set or via dependencies.
</p>
<div class="table">
<!--l. 650--><p class="noindent" ><a
id="x1-140001r13"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 12.13: </span><span
class="content"><span
class="ectt-1000">unpack </span>extensions for EAPIs</span></div><!--tex4ht:label?: x1-140001r13 -->
<div class="tabular">
<table id="TBL-31" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-31-1g"><col
id="TBL-31-1" /><col
id="TBL-31-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-31-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-31-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-31-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ectt-1000">.xz </span><span
class="ecbx-1000">and </span><span
class="ectt-1000">.tar.xz</span><span
class="ecbx-1000">?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-31-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-2-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-31-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-3-1"
class="td11"><span
class="ectt-1000">1 </span></td> <td style="white-space:nowrap; text-align:left;" id="TBL-31-3-2"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-31-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-4-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-31-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-5-1"
class="td11"><span
class="ectt-1000">3 </span></td> <td style="white-space:nowrap; text-align:left;" id="TBL-31-5-2"
class="td11">Yes</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-31-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-6-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-31-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-7-1"
class="td11"> </td></tr></table></div></div><hr class="endfloat" />
</div>
</dd><dt class="description">
<span
class="ecbx-1000">inherit</span> </dt><dd
class="description">See section <a
href="#x1-11300011.1">11.1<!--tex4ht:ref: sec:inherit --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">default</span> </dt><dd
class="description"><!--l. 668--><p class="noindent" > </p><!--l. 668--><p class="noindent" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">F</span><span
class="small-caps">A</span><span
class="small-caps">U</span><span
class="small-caps">L</span><span
class="small-caps">T</span>-<span
class="small-caps">F</span><span
class="small-caps">U</span><span
class="small-caps">N</span><span
class="small-caps">C</span></span></span> Calls the <span
class="ectt-1000">default_ </span>function for the current phase (see section <a
href="#x1-11000010.1.17">10.1.17<!--tex4ht:ref: sec:default-phase-funcs --></a>). Must not be
called if the <span
class="ectt-1000">default_ </span>function does not exist for the current phase in the current EAPI.
Only available in EAPIs listed in table <a
href="#x1-140002r14">12.14<!--tex4ht:ref: tab:default-function-table --></a>.</p></dd></dl>
<div class="table">
<!--l. 674--><p class="noindent" ><a
id="x1-140002r14"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 12.14: </span><span
class="content">EAPIs supporting the <span
class="ectt-1000">default </span>function</span></div><!--tex4ht:label?: x1-140002r14 -->
<div class="tabular">
<table id="TBL-32" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-32-1g"><col
id="TBL-32-1" /><col
id="TBL-32-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-32-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-32-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-32-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Supports </span><span
class="ectt-1000">default </span><span
class="ecbx-1000">function?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-32-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-32-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-32-2-2"
class="td11">No </td></tr><tr
style="vertical-align:baseline;" id="TBL-32-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-32-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-32-3-2"
class="td11">No</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-32-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-32-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-32-4-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-32-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-32-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-32-5-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-32-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-32-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-32-6-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-32-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-32-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h5 class="subsubsectionHead"><a
id="x1-14100012.3.3"></a>Debug Commands</h5>
<!--l. 690--><p class="nopar" >The following commands are available for debugging. Normally all of these commands should be no
ops; a package manager may provide a special debug mode where these commands instead do
something. Ebuilds must not run any of these commands once the current phase function has
returned.
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">debug-print</span> </dt><dd
class="description">If in a special debug mode, the arguments should be outputted or recorded
using some kind of debug logging.
</dd><dt class="description">
<span
class="ecbx-1000">debug-print-function</span> </dt><dd
class="description">Calls <span
class="ectt-1000">debug-print </span>with <span
class="ectt-1000">$1: entering function </span>as the first
argument and the remaining arguments as additional arguments.
</dd><dt class="description">
<span
class="ecbx-1000">debug-print-section</span> </dt><dd
class="description">Calls <span
class="ectt-1000">debug-print </span>with <span
class="ectt-1000">now in section $*</span>.</dd></dl>
<!--l. 702--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><a
id="x1-14200012.3.3"></a>Reserved Commands and Variables</h5>
<!--l. 704--><p class="nopar" >Except where documented otherwise, all functions and variables that contain any of the following
strings (ignoring case) are reserved for package manager use and may not be used or relied upon by
ebuilds:
</p><!--l. 709--><p class="noindent" >
</p><ul>
<li class="compactitem"><span
class="ectt-1000">abort</span>
</li>
<li class="compactitem"><span
class="ectt-1000">dyn</span>
</li>
<li class="compactitem"><span
class="ectt-1000">ebuild</span>
</li>
<li class="compactitem"><span
class="ectt-1000">hook</span>
</li>
<li class="compactitem"><span
class="ectt-1000">paludis</span>
</li>
<li class="compactitem"><span
class="ectt-1000">portage</span>
</li>
<li class="compactitem"><span
class="ectt-1000">prep</span></li></ul>
<!--l. 1--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">12.4 </span> <a
id="x1-14300012.4"></a>The state of the system between functions</h3>
<!--l. 4--><p class="nopar" >For the sake of this section:
</p><!--l. 7--><p class="noindent" >
</p><ul>
<li class="compactitem">Variancy is any package manager action that modifies either <span
class="ectt-1000">ROOT </span>or <span
class="ectt-1000">/ </span>in any way that
isn’t merely a simple addition of something that doesn’t alter other packages. This
includes any non-default call to any <span
class="ectt-1000">pkg </span>phase function except <span
class="ectt-1000">pkg_setup</span>, a merge of
any package or an unmerge of any package.
</li>
<li class="compactitem">As an exception, changes to <span
class="ectt-1000">DISTDIR </span>do not count as variancy.
</li>
<li class="compactitem">The <span
class="ectt-1000">pkg_setup </span>function may be assumed not to introduce variancy. Thus, ebuilds
must not perform variant actions in this phase.</li></ul>
<!--l. 17--><p class="noindent" >The following exclusivity and invariancy requirements are mandated:
</p><!--l. 20--><p class="noindent" >
</p><ul>
<li class="compactitem">No variancy shall be introduced at any point between a package’s <span
class="ectt-1000">pkg_setup </span>being
started up to the point that that package is merged, except for any variancy introduced
by that package.
</li>
<li class="compactitem">There must be no variancy between a package’s <span
class="ectt-1000">pkg_setup </span>and a package’s
<span
class="ectt-1000">pkg_postinst</span>, except for any variancy introduced by that package.
</li>
<li class="compactitem">Any non-default <span
class="ectt-1000">pkg </span>phase function must be run exclusively.
</li>
<li class="compactitem">Each phase function must be called at most once during the build process for any given
package.</li></ul>
<h2 class="chapterHead"><span class="titlemark">Chapter 13</span><br /><a
id="x1-14400013"></a>Merging and Unmerging</h2>
<!--l. 3--><p class="nopar" ><span class="paragraphHead"><a
id="x1-14500013"></a><span
class="ecbx-1000">Note:</span></span>
In this chapter, <span
class="ecti-1000">file </span>and <span
class="ecti-1000">regular file </span>have their Unix meanings.
</p><!--l. 5--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">13.1 </span> <a
id="x1-14600013.1"></a>Overview</h3>
<!--l. 7--><p class="nopar" >The merge process merges the contents of the <span
class="ectt-1000">D </span>directory onto the filesystem under <span
class="ectt-1000">ROOT</span>. This is
not a straight copy; there are various subtleties which must be addressed.
</p><!--l. 10--><p class="noindent" >The unmerge process removes an installed package’s files. It is not covered in detail in this
specification.
</p><!--l. 13--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">13.2 </span> <a
id="x1-14700013.2"></a>Directories</h3>
<!--l. 15--><p class="nopar" >Directories are merged recursively onto the filesystem. The method used to perform the merge is
not specified, so long as the end result is correct. In particular, merging a directory may alter or
remove the source directory under <span
class="ectt-1000">D</span>.
</p><!--l. 19--><p class="noindent" >Ebuilds must not attempt to merge a directory on top of any existing file that is not either a
directory or a symlink to a directory.
</p><!--l. 22--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">13.2.1 </span> <a
id="x1-14800013.2.1"></a>Permissions</h4>
<!--l. 24--><p class="nopar" >The owner, group and mode (including set*id and sticky bits) of the directory must be preserved,
except as follows:
</p><!--l. 28--><p class="noindent" >
</p><ul>
<li class="compactitem">Any directory owned by the user used to perform the build must become owned by the
root user.
</li>
<li class="compactitem">Any directory whose group is the primary group of the user used to perform the build
must have its group be that of the root user.</li></ul>
<!--l. 33--><p class="noindent" >On SELinux systems, the SELinux context must also be preserved. Other directory attributes,
including modification time, may be discarded.
</p><!--l. 36--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">13.2.2 </span> <a
id="x1-14900013.2.2"></a>Empty Directories</h4>
<!--l. 38--><p class="nopar" >Behaviour upon encountering an empty directory is undefined. Ebuilds must not attempt to install
an empty directory.
</p><!--l. 41--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">13.3 </span> <a
id="x1-15000013.3"></a>Regular Files</h3>
<!--l. 43--><p class="nopar" >Regular files are merged onto the filesystem (but see the notes on configuration file protection,
below). The method used to perform the merge is not specified, so long as the end result is
correct. In particular, merging a regular file may alter or remove the source file under
<span
class="ectt-1000">D</span>.
</p><!--l. 47--><p class="noindent" >Ebuilds must not attempt to merge a regular file on top of any existing file that is not either a
regular file or a symlink to a regular file.
</p><!--l. 50--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">13.3.1 </span> <a
id="x1-15100013.3.1"></a>Permissions</h4>
<!--l. 52--><p class="nopar" >The owner, group and mode (including set*id and sticky bits) of the file must be preserved, except
as follows:
</p><!--l. 56--><p class="noindent" >
</p><ul>
<li class="compactitem">Any file owned by the user used to perform the build must become owned by the root
user.
</li>
<li class="compactitem">Any file whose group is the primary group of the user used to perform the build must
have its group be that of the root user.
</li>
<li class="compactitem">The package manager may reduce read and write permissions on executable files that
have a set*id bit set.</li></ul>
<!--l. 63--><p class="noindent" >On SELinux systems, the SELinux context must also be preserved. Other file attributes may be
discarded.
</p><!--l. 66--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">13.3.2 </span> <a
id="x1-15200013.3.2"></a>File modification times</h4>
<!--l. 68--><p class="nopar" >
<span class="fbox"><span
class="eccc-1000"><span
class="small-caps">M</span><span
class="small-caps">T</span><span
class="small-caps">I</span><span
class="small-caps">M</span><span
class="small-caps">E</span>-<span
class="small-caps">P</span><span
class="small-caps">R</span><span
class="small-caps">E</span><span
class="small-caps">S</span><span
class="small-caps">E</span><span
class="small-caps">R</span><span
class="small-caps">V</span><span
class="small-caps">E</span></span></span></p><!--l. 69--><p class="noindent" >In EAPIs listed in table <a
href="#x1-152001r1">13.1<!--tex4ht:ref: tab:mtime-preserve --></a>, the package manager must preserve modification times of
regular files. This includes files being compressed before merging. Exceptions to this are
files newly created by the package manager and binary object files being stripped of
symbols.
</p><!--l. 75--><p class="noindent" >When preserving, the seconds part of every regular file’s mtime must be preserved exactly. The
sub-second part must either be set to zero, or set to the greatest value supported by the
operating system and filesystem that is not greater than the sub-second part of the original
time.
</p><!--l. 81--><p class="noindent" >For any given destination filesystem, the package manager must ensure that for any two preserved
files <span
class="cmmi-10">a</span>, <span
class="cmmi-10">b </span>in that filesystem the relation mtime<span
class="cmr-10">(</span><span
class="cmmi-10">a</span><span
class="cmr-10">) </span><span
class="cmsy-10">≤</span> mtime<span
class="cmr-10">(</span><span
class="cmmi-10">b</span><span
class="cmr-10">) </span>still holds, if it held under the original
image directory.
</p><!--l. 86--><p class="noindent" >In other EAPIs, the behaviour with respect to file modification times is undefined.
</p>
<div class="table">
<!--l. 89--><p class="noindent" ><a
id="x1-152001r1"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Table 13.1: </span><span
class="content">Preservation of file modification times (mtimes)</span></div><!--tex4ht:label?: x1-152001r1 -->
<div class="tabular">
<table id="TBL-33" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-33-1g"><col
id="TBL-33-1" /><col
id="TBL-33-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-33-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-33-1-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPI</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-33-1-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">mtimes preserved?</span></div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-33-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-33-2-1"
class="td11"><span
class="ectt-1000">0 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-33-2-2"
class="td11">Undefined </td></tr><tr
style="vertical-align:baseline;" id="TBL-33-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-33-3-1"
class="td11"><span
class="ectt-1000">1 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-33-3-2"
class="td11">Undefined</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-33-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-33-4-1"
class="td11"><span
class="ectt-1000">2 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-33-4-2"
class="td11">Undefined </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-33-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-33-5-1"
class="td11"><span
class="ectt-1000">3 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-33-5-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-33-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-33-6-1"
class="td11"><span
class="ectt-1000">4 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-33-6-2"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-33-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-33-7-1"
class="td11"> </td></tr></table></div>
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">13.3.3 </span> <a
id="x1-15300013.3.3"></a>Configuration File Protection</h4>
<!--l. 108--><p class="nopar" >The package manager must provide a means to prevent user configuration files from
being overwritten by any package updates. The profile variables <span
class="ectt-1000">CONFIG_PROTECT </span>and
<span
class="ectt-1000">CONFIG_PROTECT_MASK </span>(section <a
href="#x1-590005.3">5.3<!--tex4ht:ref: sec:profile-variables --></a>) control the paths for which this must be enforced.
</p><!--l. 113--><p class="noindent" >In order to ensure interoperability with configuration update tools, the following scheme must be
used by all package managers when merging any regular file:
</p><!--l. 117--><p class="noindent" >
</p><dl class="compactenum"><dt class="compactenum">
1. </dt><dd
class="compactenum">If the directory containing the file to be merged is not listed in <span
class="ectt-1000">CONFIG_PROTECT</span>, and is
not a subdirectory of any such directory, and if the file is not listed in <span
class="ectt-1000">CONFIG_PROTECT</span>,
the file is merged normally.
</dd><dt class="compactenum">
2. </dt><dd
class="compactenum">If the directory containing the file to be merged is listed in <span
class="ectt-1000">CONFIG_PROTECT_MASK</span>, or
is a subdirectory of such a directory, or if the file is listed in <span
class="ectt-1000">CONFIG_PROTECT_MASK</span>,
the file is merged normally.
</dd><dt class="compactenum">
3. </dt><dd
class="compactenum">If no existing file with the intended filename exists, or the existing file has identical
content to the one being merged, the file is installed normally.
</dd><dt class="compactenum">
4. </dt><dd
class="compactenum">Otherwise, prepend the filename with <span
class="ectt-1000">._cfg0000_</span>. If no file with the new name exists,
then the file is merged with this name.
</dd><dt class="compactenum">
5. </dt><dd
class="compactenum">Otherwise, increment the number portion (to form <span
class="ectt-1000">._cfg0001_<name></span>) and repeat
step 4. Continue this process until a usable filename is found.
</dd><dt class="compactenum">
6. </dt><dd
class="compactenum">If 9999 is reached in this way, behaviour is undefined.</dd></dl>
<!--l. 132--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">13.4 </span> <a
id="x1-15400013.4"></a>Symlinks</h3>
<!--l. 134--><p class="nopar" >Symlinks are merged as symlinks onto the filesystem. The link destination for a merged link shall
be the same as the link destination for the link under <span
class="ectt-1000">D</span>, except as noted below. The method used
to perform the merge is not specified, so long as the end result is correct; in particular, merging a
symlink may alter or remove the symlink under <span
class="ectt-1000">D</span>.
</p><!--l. 139--><p class="noindent" >Ebuilds must not attempt to merge a symlink on top of a directory.
</p><!--l. 141--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">13.4.1 </span> <a
id="x1-15500013.4.1"></a>Rewriting</h4>
<!--l. 143--><p class="nopar" >Any absolute symlink whose link starts with <span
class="ectt-1000">D </span>must be rewritten with the leading <span
class="ectt-1000">D </span>removed. The
package manager should issue a notice when doing this.
</p><!--l. 146--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">13.5 </span> <a
id="x1-15600013.5"></a>Hard links</h3>
<!--l. 148--><p class="nopar" >A hard link may be merged either as a single file with links or as multiple independent
files.
</p><!--l. 150--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">13.6 </span> <a
id="x1-15700013.6"></a>Other Files</h3>
<!--l. 152--><p class="nopar" >Ebuilds must not attempt to install any other type of file (FIFOs, device nodes etc).
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter 14</span><br /><a
id="x1-15800014"></a>Metadata Cache</h2>
<h3 class="sectionHead"><span class="titlemark">14.1 </span> <a
id="x1-15900014.1"></a>Directory Contents</h3>
<!--l. 6--><p class="nopar" >The <span
class="ectt-1000">profiles/metadata/cache </span>directory, if it exists, contains directories whose names are the
same as categories in the repository. Each subdirectory may optionally contain one file per
package version in that category, named <span
class="ectt-1000"><package>-<version></span>, in the format described
below.
</p><!--l. 10--><p class="noindent" >The metadata cache may be incomplete or non-existent, and may contain additional bogus
entries.
</p><!--l. 12--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">14.2 </span> <a
id="x1-16000014.2"></a>Cache File Format</h3>
<!--l. 14--><p class="nopar" >Each cache file contains the textual values of various metadata keys, one per line, in the
following order. Other lines may be present following these; their meanings are not defined
here.
</p><!--l. 18--><p class="noindent" >
</p><dl class="compactenum"><dt class="compactenum">
1. </dt><dd
class="compactenum">Build-time dependencies (<span
class="ectt-1000">DEPEND</span>)
</dd><dt class="compactenum">
2. </dt><dd
class="compactenum">Run-time dependencies (<span
class="ectt-1000">RDEPEND</span>)
</dd><dt class="compactenum">
3. </dt><dd
class="compactenum">Slot (<span
class="ectt-1000">SLOT</span>)
</dd><dt class="compactenum">
4. </dt><dd
class="compactenum">Source tarball URIs (<span
class="ectt-1000">SRC_URI</span>)
</dd><dt class="compactenum">
5. </dt><dd
class="compactenum"><span
class="ectt-1000">RESTRICT</span>
</dd><dt class="compactenum">
6. </dt><dd
class="compactenum">Package homepage (<span
class="ectt-1000">HOMEPAGE</span>)
</dd><dt class="compactenum">
7. </dt><dd
class="compactenum">Package license (<span
class="ectt-1000">LICENSE</span>)
</dd><dt class="compactenum">
8. </dt><dd
class="compactenum">Package description (<span
class="ectt-1000">DESCRIPTION</span>)
</dd><dt class="compactenum">
9. </dt><dd
class="compactenum">Package keywords (<span
class="ectt-1000">KEYWORDS</span>)
</dd><dt class="compactenum">
10. </dt><dd
class="compactenum">Inherited eclasses (<span
class="ectt-1000">INHERITED</span>)
</dd><dt class="compactenum">
11. </dt><dd
class="compactenum">Use flags that this package respects (<span
class="ectt-1000">IUSE</span>)
</dd><dt class="compactenum">
12. </dt><dd
class="compactenum">No longer used; this line is to be ignored.
</dd><dt class="compactenum">
13. </dt><dd
class="compactenum">Post dependencies (<span
class="ectt-1000">PDEPEND</span>)
</dd><dt class="compactenum">
14. </dt><dd
class="compactenum">Old-style virtuals provided by this package (<span
class="ectt-1000">PROVIDE</span>)
</dd><dt class="compactenum">
15. </dt><dd
class="compactenum">The ebuild API version to which this package conforms (<span
class="ectt-1000">EAPI</span>)
</dd><dt class="compactenum">
16. </dt><dd
class="compactenum">Properties (<span
class="ectt-1000">PROPERTIES</span>). In some EAPIs, may optionally be blank, regardless of ebuild
metadata; see table <a
href="#x1-70001r2">8.2<!--tex4ht:ref: tab:properties-table --></a>.
</dd><dt class="compactenum">
17. </dt><dd
class="compactenum">Defined phases (<span
class="ectt-1000">DEFINED_PHASES</span>). In some EAPIs, may optionally be blank, regardless
of ebuild metadata; see table <a
href="#x1-75001r4">8.4<!--tex4ht:ref: tab:defined-phases-table --></a>.
</dd><dt class="compactenum">
18. </dt><dd
class="compactenum">Blank lines to pad the file to 22 lines long</dd></dl>
<!--l. 40--><p class="noindent" >Future EAPIs may define new variables, remove existing variables, change the line number or
format used for a particular variable, add or reduce the total length of the file and so on. Any
future EAPI that uses this cache format will continue to place the EAPI value on line 15 if such a
concept makes sense for that EAPI, and will place a value that is clearly not a supported EAPI on
line 15 if it does not.
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter 15</span><br /><a
id="x1-16100015"></a>Glossary</h2>
<!--l. 4--><p class="nopar" >This section contains explanations of some of the terms used in this document whose meaning may
not be immediately obvious.
</p><dl class="description"><dt class="description">
<span
class="ecbx-1000">qualified package name</span> </dt><dd
class="description">A package name along with its associated category. For example,
<span
class="ectt-1000">app-editors/vim </span>is a qualified package name.
</dd><dt class="description">
<span
class="ecbx-1000">old-style virtual</span> </dt><dd
class="description">An old-style virtual is a psuedo-package which exists if it is listed in an
ebuild’s <span
class="ectt-1000">PROVIDE </span>variable. See chapter <a
href="#x1-620006">6<!--tex4ht:ref: sec:old-virtuals --></a>.
</dd><dt class="description">
<span
class="ecbx-1000">new-style virtual</span> </dt><dd
class="description">A new-style virtual is a normal package in the <span
class="ectt-1000">virtual </span>category which
installs no files and uses its dependency requirements to pull in a ‘provider’. This
is more flexible than the old-style virtuals described above, and requires no special
package manager code.
</dd><dt class="description">
<span
class="ecbx-1000">stand-alone repository</span> </dt><dd
class="description">An (ebuild) repository which is intended to function on its own
as the only, or primary, repository on a system. Contrast with <span
class="ecti-1000">slave repository </span>below.
</dd><dt class="description">
<span
class="ecbx-1000">slave repository, non-stand-alone repository</span> </dt><dd
class="description">An (ebuild) repository which is not
complete enough to function on its own, but needs one or more <span
class="ecti-1000">master repositories </span>to
satisfy dependencies and provide repository-level support files. Known in Portage as
an overlay.
</dd><dt class="description">
<span
class="ecbx-1000">master repository</span> </dt><dd
class="description">See above.
</dd></dl>
<a
id="x1-161001r206"></a>
<h2 class="appendixHead"><span class="titlemark">Appendix A</span><br /><a
id="x1-162000A"></a>metadata.xml</h2>
<!--l. 4--><p class="nopar" >The <span
class="ectt-1000">metadata.xml </span>file is used to contain extra package- or category-level information beyond what
is stored in ebuild metadata. Its exact format is strictly beyond the scope of this document, and is
described in the DTD file located at <a
href="http://www.gentoo.org/dtd/metadata.dtd" class="url" ><span
class="ectt-1000">http://www.gentoo.org/dtd/metadata.dtd</span></a>.
<a
id="x1-162001r206"></a>
</p>
<h2 class="appendixHead"><span class="titlemark">Appendix B</span><br /><a
id="x1-163000B"></a>Unspecified Items</h2>
<!--l. 10--><p class="nopar" >The following items are not specified by this document, and must not be relied upon by ebuilds.
This is, of course, an incomplete list—it covers only the things that the authors know have been
abused in the past.
</p><ul>
<li class="compactitem">The <span
class="ectt-1000">FEATURES </span>variable. This is Portage specific.
</li>
<li class="compactitem">Similarly, any <span
class="ectt-1000">PORTAGE_ </span>variable not explicitly listed.
</li>
<li class="compactitem">Any Portage configuration file.
</li>
<li class="compactitem">The VDB (<span
class="ectt-1000">/var/db/pkg</span>). Ebuilds must not access this or rely upon it existing or being
in any particular format.
</li>
<li class="compactitem">The <span
class="ectt-1000">portageq </span>command. The <span
class="ectt-1000">has_version </span>and <span
class="ectt-1000">best_version </span>commands are
available as functions.
</li>
<li class="compactitem">The <span
class="ectt-1000">emerge </span>command.
</li>
<li class="compactitem">Binary packages.
</li>
<li class="compactitem">The <span
class="ectt-1000">PORTDIR_OVERLAY </span>variable, and overlay behaviour in general.</li></ul>
<a
id="x1-163001r206"></a>
<h2 class="appendixHead"><span class="titlemark">Appendix C</span><br /><a
id="x1-164000C"></a>Historical Curiosities</h2>
<!--l. 29--><p class="nopar" >The items described in this chapter are included for information only. They were deprecated or
abandoned long before <span
class="ectt-1000">EAPI </span>was introduced. Ebuilds must not use these features, and package
managers should not be changed to support them.
</p>
<h3 class="sectionHead"><span class="titlemark">C.1 </span> <a
id="x1-165000C.1"></a>If-else use blocks</h3>
<!--l. 35--><p class="nopar" >Historically, Portage supported if-else use conditionals, as shown by listing <a
href="#x1-165001r1">C.1<!--tex4ht:ref: lst:if-else-use-listing --></a>. The block before
the colon would be taken if the condition was met, and the block after the colon would be taken if
the condition was not met.
</p><!--l. 39--><p class="noindent" >This feature was deprecated and removed from the tree long before the introduction of
<span
class="ectt-1000">EAPI</span>.
</p><!--l. 42--><p class="noindent" ><a
id="x1-165001r1"></a></p><hr class="float" /><div class="float"
>
<div class="caption"
><span class="id">Listing C.1: </span><span
class="content">If-else use blocks</span></div><!--tex4ht:label?: x1-165001r1 -->
<div class="verbatiminput">
<span
class="ectt-1000">DEPEND="</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> flag?</span><span
class="ectt-1000"> (</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> taken/if-true</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> )</span><span
class="ectt-1000"> :</span><span
class="ectt-1000"> (</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> taken/if-false</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> )</span>
<span
class="ectt-1000"> </span><br /><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> </span><span
class="ectt-1000"> "</span>
<span
class="ectt-1000"> </span><br />
</div>
</div><hr class="endfloat" />
<h3 class="sectionHead"><span class="titlemark">C.2 </span> <a
id="x1-166000C.2"></a>cvs Versions</h3>
<!--l. 48--><p class="nopar" >Portage has very crude support for CVS packages. The package <span
class="ectt-1000">foo </span>could contain a file named
<span
class="ectt-1000">foo-cvs.1.2.3.ebuild</span>. This version would order <span
class="ecti-1000">higher </span>than any non-CVS version (including
<span
class="ectt-1000">foo-2.ebuild</span>). This feature has not seen real world use and breaks versioned dependencies, so it
must not be used.
</p><!--l. 53--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">C.3 </span> <a
id="x1-167000C.3"></a>use.defaults</h3>
<!--l. 55--><p class="nopar" >The <span
class="ectt-1000">use.defaults </span>file in the profile directory was used to implement ‘autouse’—switching USE
flags on or off depending upon which packages are installed. It was deprecated long ago and finally
removed in 2009.
<a
id="x1-167001r206"></a>
</p>
<h2 class="appendixHead"><span class="titlemark">Appendix D</span><br /><a
id="x1-168000D"></a>Feature Availability by EAPI</h2>
<!--l. 3--><p class="nopar" ><span class="paragraphHead"><a
id="x1-169000D"></a><span
class="ecbx-1000">Note:</span></span>
This chapter is informative and for convenience only. Refer to the main text for specifics.
<a
id="x1-169001r1"></a>
</p><!--l. 7--><div class="longtable"> <table id="TBL-34" class="longtable"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-34-1g"><col
id="TBL-34-1" /><col
id="TBL-34-2" /><col
id="TBL-34-3" /><col
id="TBL-34-4" /><col
id="TBL-34-5" /><col
id="TBL-34-6" /><col
id="TBL-34-7" /></colgroup>
<tr
style="vertical-align:baseline;" id="TBL-34-1-"><td colspan="6" style="white-space:nowrap; text-align:left;" id="TBL-34-1-1"
class="td11"></td><div class="multicolumn" style="white-space:nowrap; text-align:center;"> <div class="caption"
><span class="id">Table D.1: </span><span
class="content">Features in EAPIs</span></div><!--tex4ht:label?: x1-169001r1 --> </div><a
id="x1-169002"></a>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-2-"><td colspan="6" style="white-space:nowrap; text-align:left;" id="TBL-34-2-1"
class="td11"></td><!--cmidrule-->
</tr><tr
style="vertical-align:baseline;" id="TBL-34-3-"><td style="white-space:nowrap; text-align:center;" id="TBL-34-3-1"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Feature</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-34-3-2"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">Reference</span></div></td><td colspan="4" style="white-space:nowrap; text-align:center;" id="TBL-34-3-3"
class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
class="ecbx-1000">EAPIs</span></div></td></tr><tr
style="vertical-align:baseline;" id="TBL-34-4-"><td style="white-space:nowrap; text-align:center;" id="TBL-34-4-1"
class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-34-4-2"
class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-34-4-3"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;">0</div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-34-4-4"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;">1</div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-34-4-5"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;">2</div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-34-4-6"
class="td11"><div class="multicolumn" style="white-space:nowrap; text-align:center;">3</div></td><td style="white-space:nowrap; text-align:center;" id="TBL-34-4-7"
class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;">4</div>
</td></tr><tr
style="vertical-align:baseline;" id="TBL-34-5-"><td colspan="6" style="white-space:nowrap; text-align:left;" id="TBL-34-5-1"
class="td11"></td><!--cmidrule-->
</tr><tr
style="vertical-align:baseline;" id="TBL-34-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-6-1"
class="td11"> </td></tr><tr
style="vertical-align:baseline;" id="TBL-34-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-7-1"
class="td11"></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-7-2"
class="td11"> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-7-3"
class="td11"> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-7-4"
class="td11"> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-7-5"
class="td11"> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-7-6"
class="td11"> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-7-7"
class="td11">
</td></tr><tr
style="vertical-align:baseline;" id="TBL-34-20-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-20-1"
class="td11">Profile <span
class="ectt-1000">IUSE </span>injection </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-20-2"
class="td11">profile-iuse-injection p<a
href="#x1-11800012.1.1">165<!--tex4ht:ref: feat:profile-iuse-injection --></a></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-20-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-20-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-20-5"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-20-6"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-20-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-21-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-21-1"
class="td11"><span
class="ectt-1000">IUSE </span>defaults </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-21-2"
class="td11">iuse-defaults p<a
href="#x1-690008.2">74<!--tex4ht:ref: feat:iuse-defaults --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-21-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-21-4"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-21-5"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-21-6"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-21-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-22-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-22-1"
class="td11"><span
class="ectt-1000">PROPERTIES </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-22-2"
class="td11">properties p<a
href="#x1-700008.3">78<!--tex4ht:ref: feat:properties --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-22-3"
class="td11">Optionally </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-22-4"
class="td11">Optionally </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-22-5"
class="td11">Optionally </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-22-6"
class="td11">Optionally </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-22-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-23-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-23-1"
class="td11"><span
class="ectt-1000">RDEPEND=DEPEND </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-23-2"
class="td11">rdepend-depend p<a
href="#x1-720008.3.2">81<!--tex4ht:ref: feat:rdepend-depend --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-23-3"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-23-4"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-23-5"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-23-6"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-23-7"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-24-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-24-1"
class="td11"><span
class="ectt-1000">DEFINED_PHASES </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-24-2"
class="td11">defined-phases p<a
href="#x1-740008.4">84<!--tex4ht:ref: feat:defined-phases --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-24-3"
class="td11">Optionally </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-24-4"
class="td11">Optionally </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-24-5"
class="td11">Optionally </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-24-6"
class="td11">Optionally </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-24-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-25-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-25-1"
class="td11"><span
class="ectt-1000">SRC_URI </span>arrows </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-25-2"
class="td11">src-uri-arrows p<a
href="#x1-910009.2.7">106<!--tex4ht:ref: feat:src-uri-arrows --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-25-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-25-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-25-5"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-25-6"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-25-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-26-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-26-1"
class="td11">Slot dependencies </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-26-2"
class="td11">slot-deps p<a
href="#x1-860009.2.4">104<!--tex4ht:ref: feat:slot-deps --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-26-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-26-4"
class="td11">Named </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-26-5"
class="td11">Named </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-26-6"
class="td11">Named </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-26-7"
class="td11">Named and Operator</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-27-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-27-1"
class="td11">Use dependencies </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-27-2"
class="td11">use-deps p<a
href="#x1-820009.2.4">95<!--tex4ht:ref: feat:use-deps --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-27-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-27-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-27-5"
class="td11">2-style </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-27-6"
class="td11">2-style </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-27-7"
class="td11">4-style </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-28-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-28-1"
class="td11"><span
class="ectt-1000">! </span>blockers </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-28-2"
class="td11">bang-strength p<a
href="#x1-850009.2.4">101<!--tex4ht:ref: feat:bang-strength --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-28-3"
class="td11">Unspecified</td><td style="white-space:nowrap; text-align:left;" id="TBL-34-28-4"
class="td11">Unspecified</td><td style="white-space:nowrap; text-align:left;" id="TBL-34-28-5"
class="td11">Weak </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-28-6"
class="td11">Weak </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-28-7"
class="td11">Weak </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-29-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-29-1"
class="td11"><span
class="ectt-1000">!! </span>blockers </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-29-2"
class="td11">bang-strength p<a
href="#x1-850009.2.4">101<!--tex4ht:ref: feat:bang-strength --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-29-3"
class="td11">Forbidden </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-29-4"
class="td11">Forbidden </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-29-5"
class="td11">Strong </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-29-6"
class="td11">Strong </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-29-7"
class="td11">Strong </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-30-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-30-1"
class="td11"><span
class="ectt-1000">S </span>to <span
class="ectt-1000">WORKDIR </span>fallback </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-30-2"
class="td11">s-workdir-fallback p<a
href="#x1-9400010.1.1">109<!--tex4ht:ref: feat:s-workdir-fallback --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-30-3"
class="td11">Always </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-30-4"
class="td11">Always </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-30-5"
class="td11">Always </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-30-6"
class="td11">Always </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-30-7"
class="td11">Conditional </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-31-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-31-1"
class="td11"><span
class="ectt-1000">pkg_pretend </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-31-2"
class="td11">pkg-pretend p<a
href="#x1-9500010.1.2">112<!--tex4ht:ref: feat:pkg-pretend --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-31-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-31-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-31-5"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-31-6"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-31-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-32-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-32-1"
class="td11"><span
class="ectt-1000">src_prepare </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-32-2"
class="td11">src-prepare p<a
href="#x1-9800010.1.5">116<!--tex4ht:ref: feat:src-prepare --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-32-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-32-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-32-5"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-32-6"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-32-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-33-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-33-1"
class="td11"><span
class="ectt-1000">src_configure </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-33-2"
class="td11">src-configure p<a
href="#x1-9900010.1.6">119<!--tex4ht:ref: feat:src-configure --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-33-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-33-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-33-5"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-33-6"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-33-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-34-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-34-1"
class="td11"><span
class="ectt-1000">src_compile </span>style </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-34-2"
class="td11">src-compile p<a
href="#x1-10000010.1.7">123<!--tex4ht:ref: feat:src-compile --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-34-3"
class="td11">0 </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-34-4"
class="td11">1 </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-34-5"
class="td11">2 </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-34-6"
class="td11">2 </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-34-7"
class="td11">2 </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-35-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-35-1"
class="td11"><span
class="ectt-1000">src_install </span>style </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-35-2"
class="td11">src-install p<a
href="#x1-10200010.1.9">129<!--tex4ht:ref: feat:src-install --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-35-3"
class="td11">no-op </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-35-4"
class="td11">no-op </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-35-5"
class="td11">no-op </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-35-6"
class="td11">no-op </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-35-7"
class="td11">4 </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-36-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-36-1"
class="td11"><span
class="ectt-1000">pkg_info </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-36-2"
class="td11">pkg-info p<a
href="#x1-10800010.1.15">134<!--tex4ht:ref: feat:pkg-info --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-36-3"
class="td11">Installed </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-36-4"
class="td11">Installed </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-36-5"
class="td11">Installed </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-36-6"
class="td11">Installed </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-36-7"
class="td11">Both </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-37-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-37-1"
class="td11"><span
class="ectt-1000">default_ </span>phase functions</td><td style="white-space:nowrap; text-align:left;" id="TBL-34-37-2"
class="td11">default-phase-funcs p<a
href="#x1-11000010.1.17">137<!--tex4ht:ref: feat:default-phase-funcs --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-37-3"
class="td11">None </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-37-4"
class="td11">None </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-37-5"
class="td11"><span
class="ectt-1000">pkg_nofetch</span>,
<span
class="ectt-1000">src_unpack</span>,
<span
class="ectt-1000">src_prepare</span>,
<span
class="ectt-1000">src_configure</span>,
<span
class="ectt-1000">src_compile</span>,
<span
class="ectt-1000">src_test</span> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-37-6"
class="td11"><span
class="ectt-1000">pkg_nofetch</span>,
<span
class="ectt-1000">src_unpack</span>,
<span
class="ectt-1000">src_prepare</span>,
<span
class="ectt-1000">src_configure</span>,
<span
class="ectt-1000">src_compile</span>,
<span
class="ectt-1000">src_test</span> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-37-7"
class="td11"><span
class="ectt-1000">pkg_nofetch</span>,
<span
class="ectt-1000">src_unpack</span>,
<span
class="ectt-1000">src_prepare</span>,
<span
class="ectt-1000">src_configure</span>,
<span
class="ectt-1000">src_compile</span>,
<span
class="ectt-1000">src_install</span>,
<span
class="ectt-1000">src_test</span> </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-38-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-38-1"
class="td11"><span
class="ectt-1000">AA </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-38-2"
class="td11">aa p<a
href="#x1-117001r1">154<!--tex4ht:ref: feat:aa --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-38-3"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-38-4"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-38-5"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-38-6"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-38-7"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-39-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-39-1"
class="td11"><span
class="ectt-1000">KV </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-39-2"
class="td11">kv p<a
href="#x1-117001r1">157<!--tex4ht:ref: feat:kv --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-39-3"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-39-4"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-39-5"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-39-6"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-39-7"
class="td11">No </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-40-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-40-1"
class="td11"> </td></tr>
<tr
style="vertical-align:baseline;" id="TBL-34-41-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-41-1"
class="td11"><span
class="ectt-1000">REPLACING_VERSIONS </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-41-2"
class="td11">replace-version-vars p<a
href="#x1-11900012.1.2">166<!--tex4ht:ref: feat:replace-version-vars --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-41-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-41-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-41-5"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-41-6"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-41-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-42-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-42-1"
class="td11"><span
class="ectt-1000">REPLACED_BY_VERSION </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-42-2"
class="td11">replace-version-vars p<a
href="#x1-11900012.1.2">166<!--tex4ht:ref: feat:replace-version-vars --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-42-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-42-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-42-5"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-42-6"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-42-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-43-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-43-1"
class="td11"><span
class="ectt-1000">EPREFIX</span>, <span
class="ectt-1000">ED</span>, <span
class="ectt-1000">EROOT </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-43-2"
class="td11">offset-prefix-vars p<a
href="#x1-12000012.1.3">169<!--tex4ht:ref: feat:offset-prefix-vars --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-43-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-43-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-43-5"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-43-6"
class="td11">Yes</td><td style="white-space:nowrap; text-align:left;" id="TBL-34-43-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-44-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-44-1"
class="td11">Most utilities die </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-44-2"
class="td11">die-on-failure p<a
href="#x1-12800012.3.3">173<!--tex4ht:ref: feat:die-on-failure --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-44-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-44-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-44-5"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-44-6"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-44-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-45-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-45-1"
class="td11"><span
class="ectt-1000">nonfatal </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-45-2"
class="td11">nonfatal p<a
href="#x1-12800012.3.3">173<!--tex4ht:ref: feat:nonfatal --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-45-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-45-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-45-5"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-45-6"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-45-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-46-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-46-1"
class="td11"><span
class="ectt-1000">dohard </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-46-2"
class="td11">banned-commands p<a
href="#x1-12900012.3.3">176<!--tex4ht:ref: feat:banned-commands --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-46-3"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-46-4"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-46-5"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-46-6"
class="td11">Yes</td><td style="white-space:nowrap; text-align:left;" id="TBL-34-46-7"
class="td11">Banned </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-47-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-47-1"
class="td11"><span
class="ectt-1000">dosed </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-47-2"
class="td11">banned-commands p<a
href="#x1-12900012.3.3">176<!--tex4ht:ref: feat:banned-commands --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-47-3"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-47-4"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-47-5"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-47-6"
class="td11">Yes</td><td style="white-space:nowrap; text-align:left;" id="TBL-34-47-7"
class="td11">Banned </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-48-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-48-1"
class="td11"><span
class="ectt-1000">econf </span>arguments </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-48-2"
class="td11">econf-options p<a
href="#x1-13400012.3.3">180<!--tex4ht:ref: feat:econf-options --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-48-3"
class="td11"> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-48-4"
class="td11"> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-48-5"
class="td11"> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-48-6"
class="td11"> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-48-7"
class="td11">disable
dependency
tracking </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-49-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-49-1"
class="td11"><span
class="ectt-1000">dodoc -r </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-49-2"
class="td11">dodoc p<a
href="#x1-13500012.3.3">183<!--tex4ht:ref: feat:dodoc --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-49-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-49-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-49-5"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-49-6"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-49-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-50-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-50-1"
class="td11"><span
class="ectt-1000">doins </span>handles symlinks </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-50-2"
class="td11">doins p<a
href="#x1-13500012.3.3">184<!--tex4ht:ref: feat:doins --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-50-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-50-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-50-5"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-50-6"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-50-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-51-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-51-1"
class="td11"><span
class="ectt-1000">doman </span>languages </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-51-2"
class="td11">doman-langs p<a
href="#x1-13500012.3.3">185<!--tex4ht:ref: feat:doman-langs --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-51-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-51-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-51-5"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-51-6"
class="td11">Yes</td><td style="white-space:nowrap; text-align:left;" id="TBL-34-51-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-52-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-52-1"
class="td11">Controllable compression</td><td style="white-space:nowrap; text-align:left;" id="TBL-34-52-2"
class="td11">controllable-compress p<a
href="#x1-13700012.3.3">195<!--tex4ht:ref: feat:controllable-compress --></a></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-52-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-52-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-52-5"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-52-6"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-52-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-53-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-53-1"
class="td11"><span
class="ectt-1000">docompress </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-53-2"
class="td11">controllable-compress p<a
href="#x1-13700012.3.3">195<!--tex4ht:ref: feat:controllable-compress --></a></td><td style="white-space:nowrap; text-align:left;" id="TBL-34-53-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-53-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-53-5"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-53-6"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-53-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-54-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-54-1"
class="td11"><span
class="ectt-1000">unpack </span>support for <span
class="ectt-1000">xz</span>? </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-54-2"
class="td11">unpack-extensions p<a
href="#x1-14000012.3.3">202<!--tex4ht:ref: feat:unpack-extensions --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-54-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-54-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-54-5"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-54-6"
class="td11">Yes</td><td style="white-space:nowrap; text-align:left;" id="TBL-34-54-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-55-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-55-1"
class="td11"><span
class="ectt-1000">default </span>function </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-55-2"
class="td11">default-func p<a
href="#x1-14000012.3.3">204<!--tex4ht:ref: feat:default-func --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-55-3"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-55-4"
class="td11">No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-55-5"
class="td11">Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-55-6"
class="td11">Yes</td><td style="white-space:nowrap; text-align:left;" id="TBL-34-55-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-56-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-56-1"
class="td11">File mtimes preserved </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-56-2"
class="td11">mtime-preserve p<a
href="#x1-15200013.3.2">212<!--tex4ht:ref: feat:mtime-preserve --></a> </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-56-3"
class="td11">Undefined</td><td style="white-space:nowrap; text-align:left;" id="TBL-34-56-4"
class="td11">Undefined</td><td style="white-space:nowrap; text-align:left;" id="TBL-34-56-5"
class="td11">Undefined</td><td style="white-space:nowrap; text-align:left;" id="TBL-34-56-6"
class="td11">Yes</td><td style="white-space:nowrap; text-align:left;" id="TBL-34-56-7"
class="td11">Yes </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-57-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-57-1"
class="td11"> </td></tr><tr
style="vertical-align:baseline;" id="TBL-34-58-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-58-1"
class="td11"></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-59-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-59-1"
class="td11"> </td></tr><tr
style="vertical-align:baseline;" id="TBL-34-60-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-60-1"
class="td11"></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-61-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-61-1"
class="td11"> </td></tr>
<tr
style="vertical-align:baseline;" id="TBL-34-17-"><td colspan="6" style="white-space:nowrap; text-align:left;" id="TBL-34-17-1"
class="td11"></td><!--cmidrule--></tr><tr
style="vertical-align:baseline;" id="TBL-34-18-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-18-1"
class="td11"></td>
</tr><tr
style="vertical-align:baseline;" id="TBL-34-19-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-19-1"
class="td11"></td></tr>
</table></div>
<a
id="x1-169003r206"></a>
<h2 class="appendixHead"><span class="titlemark">Appendix E</span><br /><a
id="x1-170000E"></a>Differences Between EAPIs</h2>
<!--l. 156--><p class="nopar" ><span class="paragraphHead"><a
id="x1-171000E"></a><span
class="ecbx-1000">Note:</span></span>
This chapter is informative and for convenience only. Refer to the main text for specifics.
</p><!--l. 158--><p class="nopar" >
</p>
<h3 class="likesectionHead"><a
id="x1-172000E"></a>EAPI 0</h3>
<!--l. 160--><p class="nopar" >EAPI 0 is the base EAPI.
</p><!--l. 162--><p class="nopar" >
</p>
<h3 class="likesectionHead"><a
id="x1-173000E"></a>EAPI 1</h3>
<!--l. 164--><p class="nopar" >EAPI 1 is EAPI 0 with the following changes:
</p><!--l. 167--><p class="noindent" >
</p><ul>
<li class="compactitem"><span
class="ectt-1000">IUSE </span>defaults, <span
class="eccc-1000"><span
class="small-caps">I</span><span
class="small-caps">U</span><span
class="small-caps">S</span><span
class="small-caps">E</span>-<span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">F</span><span
class="small-caps">A</span><span
class="small-caps">U</span><span
class="small-caps">L</span><span
class="small-caps">T</span><span
class="small-caps">S</span> </span>on page <a
href="#x1-690008.2">74<!--tex4ht:ref: feat:iuse-defaults --></a>.
</li>
<li class="compactitem">Slot dependencies, <span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">L</span><span
class="small-caps">O</span><span
class="small-caps">T</span>-<span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">P</span><span
class="small-caps">S</span> </span>on page <a
href="#x1-860009.2.4">104<!--tex4ht:ref: feat:slot-deps --></a>.
</li>
<li class="compactitem">Different <span
class="ectt-1000">src_compile </span>implementation, <span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">R</span><span
class="small-caps">C</span>-<span
class="small-caps">C</span><span
class="small-caps">O</span><span
class="small-caps">M</span><span
class="small-caps">P</span><span
class="small-caps">I</span><span
class="small-caps">L</span><span
class="small-caps">E</span>-1 </span>on page <a
href="#x1-10000010.1.7">124<!--tex4ht:ref: feat:src-compile-1 --></a>.</li></ul>
<!--l. 172--><p class="nopar" >
</p>
<h3 class="likesectionHead"><a
id="x1-174000E"></a>EAPI 2</h3>
<!--l. 174--><p class="nopar" >EAPI 2 is EAPI 1 with the following changes:
</p><!--l. 177--><p class="noindent" >
</p><ul>
<li class="compactitem"><span
class="ectt-1000">SRC_URI </span>arrows, <span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">R</span><span
class="small-caps">C</span>-<span
class="small-caps">U</span><span
class="small-caps">R</span><span
class="small-caps">I</span>-<span
class="small-caps">A</span><span
class="small-caps">R</span><span
class="small-caps">R</span><span
class="small-caps">O</span><span
class="small-caps">W</span><span
class="small-caps">S</span> </span>on page <a
href="#x1-910009.2.7">106<!--tex4ht:ref: feat:src-uri-arrows --></a>.
</li>
<li class="compactitem">Use dependencies, <span
class="eccc-1000"><span
class="small-caps">U</span><span
class="small-caps">S</span><span
class="small-caps">E</span>-<span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">P</span><span
class="small-caps">S</span> </span>on page <a
href="#x1-820009.2.4">95<!--tex4ht:ref: feat:use-deps --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">! </span>and <span
class="ectt-1000">!! </span>blockers, <span
class="eccc-1000"><span
class="small-caps">B</span><span
class="small-caps">A</span><span
class="small-caps">N</span><span
class="small-caps">G</span>-<span
class="small-caps">S</span><span
class="small-caps">T</span><span
class="small-caps">R</span><span
class="small-caps">E</span><span
class="small-caps">N</span><span
class="small-caps">G</span><span
class="small-caps">T</span><span
class="small-caps">H</span> </span>on page <a
href="#x1-850009.2.4">101<!--tex4ht:ref: feat:bang-strength --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">src_prepare</span>, <span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">R</span><span
class="small-caps">C</span>-<span
class="small-caps">P</span><span
class="small-caps">R</span><span
class="small-caps">E</span><span
class="small-caps">P</span><span
class="small-caps">A</span><span
class="small-caps">R</span><span
class="small-caps">E</span> </span>on page <a
href="#x1-9800010.1.5">116<!--tex4ht:ref: feat:src-prepare --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">src_configure</span>, <span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">R</span><span
class="small-caps">C</span>-<span
class="small-caps">C</span><span
class="small-caps">O</span><span
class="small-caps">N</span><span
class="small-caps">F</span><span
class="small-caps">I</span><span
class="small-caps">G</span><span
class="small-caps">U</span><span
class="small-caps">R</span><span
class="small-caps">E</span> </span>on page <a
href="#x1-9900010.1.6">119<!--tex4ht:ref: feat:src-configure --></a>.
</li>
<li class="compactitem">Different <span
class="ectt-1000">src_compile </span>implementation, <span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">R</span><span
class="small-caps">C</span>-<span
class="small-caps">C</span><span
class="small-caps">O</span><span
class="small-caps">M</span><span
class="small-caps">P</span><span
class="small-caps">I</span><span
class="small-caps">L</span><span
class="small-caps">E</span>-2 </span>on page <a
href="#x1-10000010.1.7">125<!--tex4ht:ref: feat:src-compile-2 --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">default_ </span>phase functions for phases <span
class="ectt-1000">pkg_nofetch</span>, <span
class="ectt-1000">src_unpack</span>, <span
class="ectt-1000">src_prepare</span>,
<span
class="ectt-1000">src_configure</span>, <span
class="ectt-1000">src_compile </span>and <span
class="ectt-1000">src_test</span>; <span
class="eccc-1000"><span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">F</span><span
class="small-caps">A</span><span
class="small-caps">U</span><span
class="small-caps">L</span><span
class="small-caps">T</span>-<span
class="small-caps">P</span><span
class="small-caps">H</span><span
class="small-caps">A</span><span
class="small-caps">S</span><span
class="small-caps">E</span>-<span
class="small-caps">F</span><span
class="small-caps">U</span><span
class="small-caps">N</span><span
class="small-caps">C</span><span
class="small-caps">S</span> </span>on page <a
href="#x1-11000010.1.17">137<!--tex4ht:ref: feat:default-phase-funcs --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">doman </span>languages support, <span
class="eccc-1000"><span
class="small-caps">D</span><span
class="small-caps">O</span><span
class="small-caps">M</span><span
class="small-caps">A</span><span
class="small-caps">N</span>-<span
class="small-caps">L</span><span
class="small-caps">A</span><span
class="small-caps">N</span><span
class="small-caps">G</span><span
class="small-caps">S</span> </span>on page <a
href="#x1-13500012.3.3">185<!--tex4ht:ref: feat:doman-langs --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">default </span>function, <span
class="eccc-1000"><span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">F</span><span
class="small-caps">A</span><span
class="small-caps">U</span><span
class="small-caps">L</span><span
class="small-caps">T</span>-<span
class="small-caps">F</span><span
class="small-caps">U</span><span
class="small-caps">N</span><span
class="small-caps">C</span> </span>on page <a
href="#x1-14000012.3.3">204<!--tex4ht:ref: feat:default-func --></a>.</li></ul>
<!--l. 189--><p class="nopar" >
</p>
<h3 class="likesectionHead"><a
id="x1-175000E"></a>EAPI 3</h3>
<!--l. 191--><p class="nopar" >EAPI 3 is EAPI 2 with the following changes:
</p><ul>
<li class="compactitem">Offset-prefix support by definition of <span
class="ectt-1000">EPREFIX</span>, <span
class="ectt-1000">ED </span>and <span
class="ectt-1000">EROOT</span>, <span
class="eccc-1000"><span
class="small-caps">O</span><span
class="small-caps">F</span><span
class="small-caps">F</span><span
class="small-caps">S</span><span
class="small-caps">E</span><span
class="small-caps">T</span>-<span
class="small-caps">P</span><span
class="small-caps">R</span><span
class="small-caps">E</span><span
class="small-caps">F</span><span
class="small-caps">I</span><span
class="small-caps">X</span>-<span
class="small-caps">V</span><span
class="small-caps">A</span><span
class="small-caps">R</span><span
class="small-caps">S</span></span>
on page <a
href="#x1-12000012.1.3">169<!--tex4ht:ref: feat:offset-prefix-vars --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">unpack </span>supports <span
class="ectt-1000">.xz </span>and <span
class="ectt-1000">.tar.xz</span>, <span
class="eccc-1000"><span
class="small-caps">U</span><span
class="small-caps">N</span><span
class="small-caps">P</span><span
class="small-caps">A</span><span
class="small-caps">C</span><span
class="small-caps">K</span>-<span
class="small-caps">E</span><span
class="small-caps">X</span><span
class="small-caps">T</span><span
class="small-caps">E</span><span
class="small-caps">N</span><span
class="small-caps">S</span><span
class="small-caps">I</span><span
class="small-caps">O</span><span
class="small-caps">N</span><span
class="small-caps">S</span> </span>on page <a
href="#x1-14000012.3.3">202<!--tex4ht:ref: feat:unpack-extensions --></a>.
</li>
<li class="compactitem">File modification times are preserved, <span
class="eccc-1000"><span
class="small-caps">M</span><span
class="small-caps">T</span><span
class="small-caps">I</span><span
class="small-caps">M</span><span
class="small-caps">E</span>-<span
class="small-caps">P</span><span
class="small-caps">R</span><span
class="small-caps">E</span><span
class="small-caps">S</span><span
class="small-caps">E</span><span
class="small-caps">R</span><span
class="small-caps">V</span><span
class="small-caps">E</span> </span>on page <a
href="#x1-15200013.3.2">212<!--tex4ht:ref: feat:mtime-preserve --></a>.</li></ul>
<!--l. 199--><p class="nopar" >
</p>
<h3 class="likesectionHead"><a
id="x1-176000E"></a>EAPI 4</h3>
<!--l. 201--><p class="nopar" >EAPI 4 is EAPI 3 with the following changes:
</p><!--l. 204--><p class="noindent" >
</p><ul>
<li class="compactitem"><span
class="ectt-1000">pkg_pretend</span>, <span
class="eccc-1000"><span
class="small-caps">P</span><span
class="small-caps">K</span><span
class="small-caps">G</span>-<span
class="small-caps">P</span><span
class="small-caps">R</span><span
class="small-caps">E</span><span
class="small-caps">T</span><span
class="small-caps">E</span><span
class="small-caps">N</span><span
class="small-caps">D</span> </span>on page <a
href="#x1-9500010.1.2">112<!--tex4ht:ref: feat:pkg-pretend --></a>.
</li>
<li class="compactitem">Slot operator dependencies, <span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">L</span><span
class="small-caps">O</span><span
class="small-caps">T</span>-<span
class="small-caps">O</span><span
class="small-caps">P</span><span
class="small-caps">E</span><span
class="small-caps">R</span><span
class="small-caps">A</span><span
class="small-caps">T</span><span
class="small-caps">O</span><span
class="small-caps">R</span>-<span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">P</span><span
class="small-caps">S</span> </span>on page <a
href="#x1-860009.2.4">104<!--tex4ht:ref: feat:slot-operator-deps --></a>.
</li>
<li class="compactitem">Use dependency defaults, <span
class="eccc-1000"><span
class="small-caps">U</span><span
class="small-caps">S</span><span
class="small-caps">E</span>-<span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">P</span>-<span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">F</span><span
class="small-caps">A</span><span
class="small-caps">U</span><span
class="small-caps">L</span><span
class="small-caps">T</span><span
class="small-caps">S</span> </span>on page <a
href="#x1-870009.2.4">105<!--tex4ht:ref: feat:use-dep-defaults --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">DEFINED_PHASES </span>support is mandatory, <span
class="eccc-1000"><span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">F</span><span
class="small-caps">I</span><span
class="small-caps">N</span><span
class="small-caps">E</span><span
class="small-caps">D</span>-<span
class="small-caps">P</span><span
class="small-caps">H</span><span
class="small-caps">A</span><span
class="small-caps">S</span><span
class="small-caps">E</span><span
class="small-caps">S</span> </span>on page <a
href="#x1-740008.4">84<!--tex4ht:ref: feat:defined-phases --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">PROPERTIES </span>support is mandatory, <span
class="eccc-1000"><span
class="small-caps">P</span><span
class="small-caps">R</span><span
class="small-caps">O</span><span
class="small-caps">P</span><span
class="small-caps">E</span><span
class="small-caps">R</span><span
class="small-caps">T</span><span
class="small-caps">I</span><span
class="small-caps">E</span><span
class="small-caps">S</span> </span>on page <a
href="#x1-700008.3">78<!--tex4ht:ref: feat:properties --></a>.
</li>
<li class="compactitem">Default <span
class="ectt-1000">src_install </span>no longer a no-op, <span
class="eccc-1000"><span
class="small-caps">S</span><span
class="small-caps">R</span><span
class="small-caps">C</span>-<span
class="small-caps">I</span><span
class="small-caps">N</span><span
class="small-caps">S</span><span
class="small-caps">T</span><span
class="small-caps">A</span><span
class="small-caps">L</span><span
class="small-caps">L</span>-4 </span>on page <a
href="#x1-10200010.1.9">129<!--tex4ht:ref: feat:src-install-4 --></a>.
</li>
<li class="compactitem">Controllable compression and <span
class="ectt-1000">docompress</span>, <span
class="eccc-1000"><span
class="small-caps">C</span><span
class="small-caps">O</span><span
class="small-caps">N</span><span
class="small-caps">T</span><span
class="small-caps">R</span><span
class="small-caps">O</span><span
class="small-caps">L</span><span
class="small-caps">L</span><span
class="small-caps">A</span><span
class="small-caps">B</span><span
class="small-caps">L</span><span
class="small-caps">E</span>-<span
class="small-caps">C</span><span
class="small-caps">O</span><span
class="small-caps">M</span><span
class="small-caps">P</span><span
class="small-caps">R</span><span
class="small-caps">E</span><span
class="small-caps">S</span><span
class="small-caps">S</span> </span>on page <a
href="#x1-13700012.3.3">195<!--tex4ht:ref: feat:controllable-compress --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">dodoc -r </span>support, <span
class="eccc-1000"><span
class="small-caps">D</span><span
class="small-caps">O</span><span
class="small-caps">D</span><span
class="small-caps">O</span><span
class="small-caps">C</span> </span>on page <a
href="#x1-13500012.3.3">183<!--tex4ht:ref: feat:dodoc --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">doins </span>supports symlinks, <span
class="eccc-1000"><span
class="small-caps">D</span><span
class="small-caps">O</span><span
class="small-caps">I</span><span
class="small-caps">N</span><span
class="small-caps">S</span> </span>on page <a
href="#x1-13500012.3.3">184<!--tex4ht:ref: feat:doins --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">dohard</span>, <span
class="ectt-1000">dosed </span>banned, <span
class="eccc-1000"><span
class="small-caps">B</span><span
class="small-caps">A</span><span
class="small-caps">N</span><span
class="small-caps">N</span><span
class="small-caps">E</span><span
class="small-caps">D</span>-<span
class="small-caps">C</span><span
class="small-caps">O</span><span
class="small-caps">M</span><span
class="small-caps">M</span><span
class="small-caps">A</span><span
class="small-caps">N</span><span
class="small-caps">D</span><span
class="small-caps">S</span> </span>on page <a
href="#x1-12900012.3.3">176<!--tex4ht:ref: feat:banned-commands --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">econf </span>adds <span
class="ectt-1000">--disable-dependency-tracking</span>, <span
class="eccc-1000"><span
class="small-caps">E</span><span
class="small-caps">C</span><span
class="small-caps">O</span><span
class="small-caps">N</span><span
class="small-caps">F</span>-<span
class="small-caps">O</span><span
class="small-caps">P</span><span
class="small-caps">T</span><span
class="small-caps">I</span><span
class="small-caps">O</span><span
class="small-caps">N</span><span
class="small-caps">S</span> </span>on page <a
href="#x1-13400012.3.3">180<!--tex4ht:ref: feat:econf-options --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">pkg_info </span>can run on non-installed packages, <span
class="eccc-1000"><span
class="small-caps">P</span><span
class="small-caps">K</span><span
class="small-caps">G</span>-<span
class="small-caps">I</span><span
class="small-caps">N</span><span
class="small-caps">F</span><span
class="small-caps">O</span> </span>on page <a
href="#x1-10800010.1.15">134<!--tex4ht:ref: feat:pkg-info --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">USE </span>is calculated differently, <span
class="eccc-1000"><span
class="small-caps">P</span><span
class="small-caps">R</span><span
class="small-caps">O</span><span
class="small-caps">F</span><span
class="small-caps">I</span><span
class="small-caps">L</span><span
class="small-caps">E</span>-<span
class="small-caps">I</span><span
class="small-caps">U</span><span
class="small-caps">S</span><span
class="small-caps">E</span>-<span
class="small-caps">I</span><span
class="small-caps">N</span><span
class="small-caps">J</span><span
class="small-caps">E</span><span
class="small-caps">C</span><span
class="small-caps">T</span><span
class="small-caps">I</span><span
class="small-caps">O</span><span
class="small-caps">N</span> </span>on page <a
href="#x1-11800012.1.1">165<!--tex4ht:ref: feat:profile-iuse-injection --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">AA </span>is gone, <span
class="eccc-1000"><span
class="small-caps">A</span><span
class="small-caps">A</span> </span>on page <a
href="#x1-117001r1">154<!--tex4ht:ref: feat:aa --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">KV </span>is gone, <span
class="eccc-1000"><span
class="small-caps">K</span><span
class="small-caps">V</span> </span>on page <a
href="#x1-117001r1">157<!--tex4ht:ref: feat:kv --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">REPLACING_VERSIONS </span>and <span
class="ectt-1000">REPLACED_BY_VERSION</span>, <span
class="eccc-1000"><span
class="small-caps">R</span><span
class="small-caps">E</span><span
class="small-caps">P</span><span
class="small-caps">L</span><span
class="small-caps">A</span><span
class="small-caps">C</span><span
class="small-caps">E</span>-<span
class="small-caps">V</span><span
class="small-caps">E</span><span
class="small-caps">R</span><span
class="small-caps">S</span><span
class="small-caps">I</span><span
class="small-caps">O</span><span
class="small-caps">N</span>-<span
class="small-caps">V</span><span
class="small-caps">A</span><span
class="small-caps">R</span><span
class="small-caps">S</span> </span>on
page <a
href="#x1-11900012.1.2">166<!--tex4ht:ref: feat:replace-version-vars --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">S </span>to <span
class="ectt-1000">WORKDIR </span>fallback restricted, <span
class="eccc-1000"><span
class="small-caps">S</span>-<span
class="small-caps">W</span><span
class="small-caps">O</span><span
class="small-caps">R</span><span
class="small-caps">K</span><span
class="small-caps">D</span><span
class="small-caps">I</span><span
class="small-caps">R</span>-<span
class="small-caps">F</span><span
class="small-caps">A</span><span
class="small-caps">L</span><span
class="small-caps">L</span><span
class="small-caps">B</span><span
class="small-caps">A</span><span
class="small-caps">C</span><span
class="small-caps">K</span> </span>on page <a
href="#x1-9400010.1.1">109<!--tex4ht:ref: feat:s-workdir-fallback --></a>.
</li>
<li class="compactitem"><span
class="ectt-1000">RDEPEND=DEPEND </span>no longer done, <span
class="eccc-1000"><span
class="small-caps">R</span><span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">P</span><span
class="small-caps">E</span><span
class="small-caps">N</span><span
class="small-caps">D</span>-<span
class="small-caps">D</span><span
class="small-caps">E</span><span
class="small-caps">P</span><span
class="small-caps">E</span><span
class="small-caps">N</span><span
class="small-caps">D</span> </span>on page <a
href="#x1-720008.3.2">81<!--tex4ht:ref: feat:rdepend-depend --></a>.
</li>
<li class="compactitem">Utilities now die on failure, <span
class="eccc-1000"><span
class="small-caps">D</span><span
class="small-caps">I</span><span
class="small-caps">E</span>-<span
class="small-caps">O</span><span
class="small-caps">N</span>-<span
class="small-caps">F</span><span
class="small-caps">A</span><span
class="small-caps">I</span><span
class="small-caps">L</span><span
class="small-caps">U</span><span
class="small-caps">R</span><span
class="small-caps">E</span> </span>on page <a
href="#x1-12800012.3.3">173<!--tex4ht:ref: feat:die-on-failure --></a>, unless called under
<span
class="ectt-1000">nonfatal</span>, <span
class="eccc-1000"><span
class="small-caps">N</span><span
class="small-caps">O</span><span
class="small-caps">N</span><span
class="small-caps">F</span><span
class="small-caps">A</span><span
class="small-caps">T</span><span
class="small-caps">A</span><span
class="small-caps">L</span> </span>on page <a
href="#x1-12800012.3.3">173<!--tex4ht:ref: feat:nonfatal --></a></li></ul>
<h2 class="likechapterHead"><a
id="x1-177000E"></a>Bibliography</h2>
<div class="thebibliography">
<p class="bibitem" ><span class="biblabel">
[1]<span class="bibsp">   </span></span><a
id="XGlep44"></a>Marius Mauch. GLEP 44: Manifest2 format.
<a
href="http://glep.gentoo.org/glep-0044.html" class="url" ><span
class="ectt-1000">http://glep.gentoo.org/glep-0044.html</span></a>, December 2005.
</p>
</div>
</body></html>
|
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