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# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=7
CMAKE_ECLASS=cmake
PYTHON_COMPAT=( python3_{8..10} )
inherit cmake-multilib llvm llvm.org python-any-r1 toolchain-funcs
DESCRIPTION="Low level support for a standard C++ library"
HOMEPAGE="https://libcxxabi.llvm.org/"
LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
SLOT="0"
KEYWORDS="amd64 ~arm ~arm64 ~riscv ~x86 ~x64-macos"
IUSE="+libunwind static-libs test elibc_musl"
RESTRICT="!test? ( test )"
RDEPEND="
libunwind? (
|| (
>=sys-libs/libunwind-1.0.1-r1[static-libs?,${MULTILIB_USEDEP}]
>=sys-libs/llvm-libunwind-3.9.0-r1[static-libs?,${MULTILIB_USEDEP}]
)
)"
# llvm-6 for new lit options
DEPEND="${RDEPEND}
>=sys-devel/llvm-6"
BDEPEND="
test? ( >=sys-devel/clang-3.9.0
$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
)"
# libcxx is needed uncondtionally for the headers
LLVM_COMPONENTS=( libcxx{abi,} llvm/cmake/modules )
llvm.org_set_globals
python_check_deps() {
has_version "dev-python/lit[${PYTHON_USEDEP}]"
}
pkg_setup() {
# darwin prefix builds do not have llvm installed yet, so rely on bootstrap-prefix
# to set the appropriate path vars to LLVM instead of using llvm_pkg_setup.
if [[ ${CHOST} != *-darwin* ]] || has_version dev-lang/llvm; then
llvm_pkg_setup
fi
use test && python-any-r1_pkg_setup
}
multilib_src_configure() {
# link against compiler-rt instead of libgcc if we are using clang with libunwind
local want_compiler_rt=OFF
if use libunwind && tc-is-clang; then
local compiler_rt=$($(tc-getCC) ${CFLAGS} ${CPPFLAGS} \
${LDFLAGS} -print-libgcc-file-name)
if [[ ${compiler_rt} == *libclang_rt* ]]; then
want_compiler_rt=ON
fi
fi
local libdir=$(get_libdir)
local mycmakeargs=(
-DLIBCXXABI_LIBDIR_SUFFIX=${libdir#lib}
-DLIBCXXABI_ENABLE_SHARED=ON
-DLIBCXXABI_ENABLE_STATIC=$(usex static-libs)
-DLIBCXXABI_USE_LLVM_UNWINDER=$(usex libunwind)
-DLIBCXXABI_INCLUDE_TESTS=$(usex test)
-DLIBCXXABI_USE_COMPILER_RT=${want_compiler_rt}
-DLIBCXXABI_LIBCXX_INCLUDES="${WORKDIR}"/libcxx/include
# upstream is omitting standard search path for this
# probably because gcc & clang are bundling their own unwind.h
-DLIBCXXABI_LIBUNWIND_INCLUDES="${EPREFIX}"/usr/include
)
if use test; then
local clang_path=$(type -P "${CHOST:+${CHOST}-}clang" 2>/dev/null)
[[ -n ${clang_path} ]] || die "Unable to find ${CHOST}-clang for tests"
mycmakeargs+=(
-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
-DLLVM_LIT_ARGS="$(get_lit_flags);--param=cxx_under_test=${clang_path}"
-DPython3_EXECUTABLE="${PYTHON}"
)
fi
cmake_src_configure
}
build_libcxx() {
local -x LDFLAGS="${LDFLAGS} -L${BUILD_DIR}/$(get_libdir)"
local CMAKE_USE_DIR=${WORKDIR}/libcxx
local BUILD_DIR=${BUILD_DIR}/libcxx
local mycmakeargs=(
-DLIBCXX_LIBDIR_SUFFIX=
-DLIBCXX_ENABLE_SHARED=OFF
-DLIBCXX_ENABLE_STATIC=ON
-DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF
-DLIBCXX_CXX_ABI=libcxxabi
-DLIBCXX_CXX_ABI_INCLUDE_PATHS="${S}"/include
-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
-DLIBCXX_HAS_GCC_S_LIB=OFF
-DLIBCXX_INCLUDE_TESTS=OFF
)
cmake_src_configure
cmake_src_compile
}
multilib_src_test() {
# build a local copy of libc++ for testing to avoid circular dep
build_libcxx
mv "${BUILD_DIR}"/libcxx/lib/libc++* "${BUILD_DIR}/$(get_libdir)/" || die
local -x LIT_PRESERVES_TMP=1
cmake_build check-cxxabi
}
multilib_src_install_all() {
insinto /usr/include/libcxxabi
doins -r include/.
}
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