+++ /dev/null
-# Copyright 1999-2019 Gentoo Authors
-# Distributed under the terms of the GNU General Public License v2
-
-EAPI=6
-
-# Ninja provides better scalability and cleaner verbose output, and is used
-# throughout all LLVM projects.
-: ${CMAKE_MAKEFILE_GENERATOR:=ninja}
-# (needed due to CMAKE_BUILD_TYPE != Gentoo)
-CMAKE_MIN_VERSION=3.7.0-r1
-PYTHON_COMPAT=( python2_7 )
-
-inherit cmake-multilib llvm multiprocessing python-any-r1 \
- toolchain-funcs
-
-DESCRIPTION="New implementation of the C++ standard library, targeting C++11"
-HOMEPAGE="https://libcxx.llvm.org/"
-SRC_URI="https://releases.llvm.org/${PV/_//}/${P/_/}.src.tar.xz"
-
-LICENSE="|| ( UoI-NCSA MIT )"
-SLOT="0"
-KEYWORDS="~amd64 ~arm ~arm64 ~x86"
-IUSE="elibc_glibc elibc_musl +libcxxabi libcxxrt +libunwind +static-libs test"
-REQUIRED_USE="libunwind? ( || ( libcxxabi libcxxrt ) )
- ?? ( libcxxabi libcxxrt )"
-RESTRICT="!test? ( test )"
-
-RDEPEND="
- libcxxabi? ( ~sys-libs/libcxxabi-${PV}[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
- libcxxrt? ( sys-libs/libcxxrt[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
- !libcxxabi? ( !libcxxrt? ( >=sys-devel/gcc-4.7:=[cxx] ) )"
-# llvm-6 for new lit options
-# clang-3.9.0 installs necessary target symlinks unconditionally
-# which removes the need for MULTILIB_USEDEP
-DEPEND="${RDEPEND}
- test? ( >=sys-devel/clang-3.9.0
- $(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]') )
- app-arch/xz-utils
- >=sys-devel/llvm-6"
-
-S=${WORKDIR}/${P/_/}.src
-
-DOCS=( CREDITS.TXT )
-
-PATCHES=(
- # Add link flag "-Wl,-z,defs" to avoid underlinking; this is needed in a
- # out-of-tree build.
- "${FILESDIR}/${PN}-3.9-cmake-link-flags.patch"
-)
-
-# least intrusive of all
-CMAKE_BUILD_TYPE=RelWithDebInfo
-
-python_check_deps() {
- has_version "dev-python/lit[${PYTHON_USEDEP}]"
-}
-
-pkg_setup() {
- llvm_pkg_setup
- use test && python-any-r1_pkg_setup
-
- if ! use libcxxabi && ! use libcxxrt && ! tc-is-gcc ; then
- eerror "To build ${PN} against libsupc++, you have to use gcc. Other"
- eerror "compilers are not supported. Please set CC=gcc and CXX=g++"
- eerror "and try again."
- die
- fi
- if tc-is-gcc && [[ $(gcc-version) < 4.7 ]] ; then
- eerror "${PN} needs to be built with gcc-4.7 or later (or other"
- eerror "conformant compilers). Please use gcc-config to switch to"
- eerror "gcc-4.7 or later version."
- die
- fi
-}
-
-test_compiler() {
- $(tc-getCXX) ${CXXFLAGS} ${LDFLAGS} "${@}" -o /dev/null -x c++ - \
- <<<'int main() { return 0; }' &>/dev/null
-}
-
-src_configure() {
- # note: we need to do this before multilib kicks in since it will
- # alter the CHOST
- local cxxabi cxxabi_incs
- if use libcxxabi; then
- cxxabi=libcxxabi
- cxxabi_incs="${EPREFIX}/usr/include/libcxxabi"
- elif use libcxxrt; then
- cxxabi=libcxxrt
- cxxabi_incs="${EPREFIX}/usr/include/libcxxrt"
- else
- local gcc_inc="${EPREFIX}/usr/lib/gcc/${CHOST}/$(gcc-fullversion)/include/g++-v$(gcc-major-version)"
- cxxabi=libsupc++
- cxxabi_incs="${gcc_inc};${gcc_inc}/${CHOST}"
- fi
-
- multilib-minimal_src_configure
-}
-
-multilib_src_configure() {
- # we want -lgcc_s for unwinder, and for compiler runtime when using
- # gcc, clang with gcc runtime (or any unknown compiler)
- local extra_libs=() want_gcc_s=ON
- if use libunwind; then
- # work-around missing -lunwind upstream
- extra_libs+=( -lunwind )
- # if we're using libunwind and clang with compiler-rt, we want
- # to link to compiler-rt instead of -lgcc_s
- if tc-is-clang; then
- local compiler_rt=$($(tc-getCC) ${CFLAGS} ${CPPFLAGS} \
- ${LDFLAGS} -print-libgcc-file-name)
- if [[ ${compiler_rt} == *libclang_rt* ]]; then
- want_gcc_s=OFF
- extra_libs+=( "${compiler_rt}" )
- fi
- fi
- fi
-
- # bootstrap: cmake is unhappy if compiler can't link to stdlib
- local nolib_flags=( -nodefaultlibs -lc )
- if ! test_compiler; then
- if test_compiler "${nolib_flags[@]}"; then
- local -x LDFLAGS="${LDFLAGS} ${nolib_flags[*]}"
- ewarn "${CXX} seems to lack runtime, trying with ${nolib_flags[*]}"
- fi
- fi
-
- local libdir=$(get_libdir)
- local mycmakeargs=(
- -DLIBCXX_LIBDIR_SUFFIX=${libdir#lib}
- -DLIBCXX_ENABLE_SHARED=ON
- -DLIBCXX_ENABLE_STATIC=$(usex static-libs)
- -DLIBCXX_CXX_ABI=${cxxabi}
- -DLIBCXX_CXX_ABI_INCLUDE_PATHS=${cxxabi_incs}
- # we're using our own mechanism for generating linker scripts
- -DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
- -DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
- -DLIBCXX_HAS_GCC_S_LIB=${want_gcc_s}
- -DLIBCXX_INCLUDE_TESTS=$(usex test)
- -DCMAKE_SHARED_LINKER_FLAGS="${extra_libs[*]} ${LDFLAGS}"
- )
-
- if use test; then
- local clang_path=$(type -P "${CHOST:+${CHOST}-}clang" 2>/dev/null)
- local jobs=${LIT_JOBS:-$(makeopts_jobs "${MAKEOPTS}" "$(get_nproc)")}
-
- [[ -n ${clang_path} ]] || die "Unable to find ${CHOST}-clang for tests"
-
- mycmakeargs+=(
- -DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
- -DLLVM_LIT_ARGS="-vv;-j;${jobs};--param=cxx_under_test=${clang_path}"
- )
- fi
- cmake-utils_src_configure
-}
-
-multilib_src_test() {
- cmake-utils_src_make check-libcxx
-}
-
-# Usage: deps
-gen_ldscript() {
- local output_format
- output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
- [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
-
- cat <<-END_LDSCRIPT
-/* GNU ld script
- Include missing dependencies
-*/
-${output_format}
-GROUP ( $@ )
-END_LDSCRIPT
-}
-
-gen_static_ldscript() {
- local libdir=$(get_libdir)
- local cxxabi_lib=$(usex libcxxabi "libc++abi.a" "$(usex libcxxrt "libcxxrt.a" "libsupc++.a")")
-
- # Move it first.
- mv "${ED}/usr/${libdir}/libc++.a" "${ED}/usr/${libdir}/libc++_static.a" || die
- # Generate libc++.a ldscript for inclusion of its dependencies so that
- # clang++ -stdlib=libc++ -static works out of the box.
- local deps="libc++_static.a ${cxxabi_lib} $(usex libunwind libunwind.a libgcc_eh.a)"
- # On Linux/glibc it does not link without libpthread or libdl. It is
- # fine on FreeBSD.
- use elibc_glibc && deps+=" libpthread.a libdl.a"
-
- gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.a" || die
-}
-
-gen_shared_ldscript() {
- local libdir=$(get_libdir)
- # libsupc++ doesn't have a shared version
- local cxxabi_lib=$(usex libcxxabi "libc++abi.so" "$(usex libcxxrt "libcxxrt.so" "libsupc++.a")")
-
- mv "${ED}/usr/${libdir}/libc++.so" "${ED}/usr/${libdir}/libc++_shared.so" || die
- local deps="libc++_shared.so ${cxxabi_lib} $(usex libunwind libunwind.so libgcc_s.so)"
-
- gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.so" || die
-}
-
-multilib_src_install() {
- cmake-utils_src_install
- gen_shared_ldscript
- use static-libs && gen_static_ldscript
-}
-
-pkg_postinst() {
- elog "This package (${PN}) is mainly intended as a replacement for the C++"
- elog "standard library when using clang."
- elog "To use it, instead of libstdc++, use:"
- elog " clang++ -stdlib=libc++"
- elog "to compile your C++ programs."
-}
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