Initial import

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+# Copyright 1999-2004 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/eclass/confutils.eclass,v 1.1 2004/06/27 16:05:26 stuart Exp $
+#
+# eclass/confutils.eclass
+#		Utility functions to help with configuring a package
+#
+#		Based on Stuart's work for the PHP 5 eclass
+#
+# Author(s)		Stuart Herbert
+#				<stuart@gentoo.org>
+#
+# ========================================================================
+
+IUSE="$IUSE shared"
+
+# ========================================================================
+# confutils_init ()
+#
+# Call this function from your src_compile() function to initialise
+# this eclass first
+
+confutils_init () {
+	if useq shared ; then
+		shared="=shared"
+	else
+		shared=
+	fi
+}
+
+# ========================================================================
+# confutils_use_conflict ()
+#
+# Use this function to automatically complain to the user if conflicting
+# USE flags have been enabled
+#
+# $1	- flag that depends on other flags
+# $2 .. - flags that conflict
+
+confutils_use_conflict () {
+	if ! useq $1 ; then
+		return
+	fi
+
+	local my_flag="$1"
+	shift
+
+	local my_present=
+	local my_remove=
+
+	while [ "$1+" != "+" ]; do
+		if useq $1 ; then
+			my_present="${my_present} $1"
+			my_remove="${my_remove} -$1"
+		fi
+		shift
+	done
+
+	if [ -n "$my_present" ]; then
+		echo
+		eerror "USE flag '$my_flag' conflicts with these USE flag(s):"
+		eerror "  $my_present"
+		eerror
+		eerror "You must disable these conflicting flags before you can emerge this package."
+		eerror "You can do this by disabling these flags in /etc/portage/package.use:"
+		eerror "    =$CATEGORY/$PN-$PVR: $my_remove"
+		eerror
+		die "Conflicting USE flags"
+	fi
+}
+
+# ========================================================================
+# confutils_use_depend_all ()
+#
+# Use this function to automatically complain to the user if a USE flag
+# depends on another USE flag that hasn't been enabled
+#
+# $1	- flag that depends on other flags
+# $2	- error message to show
+# $3 .. - 
+
+confutils_use_depend_all () {
+	if ! useq $1 ; then
+		return
+	fi
+
+	local my_flag="$1"
+	shift
+
+	local my_missing=
+
+	while [ "$1+" != "+" ]; do
+		if ! useq $1 ; then
+			my_missing="${my_missing} $1"
+		fi
+		shift
+	done
+
+	if [ -n "$my_missing" ]; then
+		echo
+		eerror "USE flag '$my_flag' needs these additional flag(s) set:"
+		eerror "  $my_missing"
+		eerror
+		eerror "You can do this by enabling these flags in /etc/portage/package.use:"
+		eerror "    =$CATEGORY/$PN-$PVR: $my_missing"
+		eerror
+		eerror "You could disable this flag instead in /etc/portage/package.use:"
+		eerror "	=$CATEGORY/$PN-$PVR: -$my_flag"
+		echo
+
+		die "Need missing USE flags"
+	fi
+}
+
+# ========================================================================
+# confutils_use_depend_any ()
+#
+# Use this function to automatically complain to the user if a USE flag
+# depends on another USE flag that hasn't been enabled
+#
+# $1	- flag that depends on other flags
+# $2	- error message to show
+# $3 .. - 
+
+confutils_use_depend_any () {
+	if ! useq $1 ; then
+		return
+	fi
+
+	local my_flag="$1"
+	shift
+
+	local my_found=
+	local my_missing=
+
+	while [ "$1+" != "+" ]; do
+		if useq $1 ; then
+			my_found="${my_found} $1"
+		else
+			my_missing="${my_missing} $1"
+		fi
+		shift
+	done
+
+	if [ -z "$my_found" ]; then
+		echo
+		eerror "USE flag '$my_flag' needs one of these additional flag(s) set:"
+		eerror "  $my_missing"
+		eerror
+		eerror "You can do this by enabling one of these flags in /etc/portage/package.use"
+		eerror
+		die "Need missing USE flag"
+	fi
+}
+
+# ========================================================================
+# enable_extension_disable ()
+#
+# Use this function to disable an extension that is enabled by default.
+# This is provided for those rare configure scripts that don't support
+# a --enable for the corresponding --disable
+#
+# $1	- extension name
+# $2	- USE flag
+
+enable_extension_disable () {
+	if ! useq "$2" ; then
+		my_conf="${my_conf} --disable-$1"
+	fi
+}
+
+# ========================================================================
+# enable_extension_enable () 
+#
+# This function is like use_enable(), except that it knows about
+# enabling modules as shared libraries, and it supports passing
+# additional data with the switch
+#
+# $1	- extension name
+# $2	- USE flag
+# $3	- 1 = support shared, 0 = never support shared
+# $4	- additional setting for configure
+
+enable_extension_enable () {
+	local my_shared
+
+	if [ "$3" == "1" ]; then
+		my_shared="$shared"
+		if [ "$4+" != "+" ]; then
+			my_shared="${my_shared},$4"
+		fi
+	else
+		if [ "$4+" != "+" ]; then
+			my_shared="=$4"
+		fi
+	fi
+
+	if useq $2 ; then
+		my_conf="${my_conf} --enable-$1$my_shared"
+	else
+		my_conf="${my_conf} --disable-$1"
+	fi
+}
+
+# ========================================================================
+# enable_extension_without ()
+#
+# Use this function to disable an extension that is enabled by default
+# This function is provided for those rare configure scripts that support
+# --without but not the corresponding --with
+#
+# $1	- extension name
+# $2	- USE flag
+
+enable_extension_without () {
+	if ! useq "$2" ; then
+		my_conf="${my_conf} --without-$1"
+	fi
+}
+
+# ========================================================================
+# enable_extension_with ()
+#
+# This function is a replacement for use_with.  It supports building
+# extensions as shared libraries,
+
+# $1	- extension name
+# $2	- USE flag
+# $3	- 1 = support shared, 0 = never support shared
+# $4	- additional setting for configure
+
+enable_extension_with () {
+	local my_shared
+
+	if [ "$3" == "1" ]; then
+		my_shared="$shared"
+		if [ "$4+" != "+" ]; then
+			my_shared="${my_shared},$4"
+		fi
+	else
+		if [ "$4+" != "+" ]; then
+			my_shared="=$4"
+		fi
+	fi
+
+	if useq $2 ; then
+		my_conf="${my_conf} --with-$1$my_shared"
+	else
+		my_conf="${my_conf} --without-$1"
+	fi
+}