diff options
Diffstat (limited to 'sys-libs/libcxx/libcxx-10.0.1_rc3.ebuild')
| -rw-r--r-- | sys-libs/libcxx/libcxx-10.0.1_rc3.ebuild | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/sys-libs/libcxx/libcxx-10.0.1_rc3.ebuild b/sys-libs/libcxx/libcxx-10.0.1_rc3.ebuild new file mode 100644 index 000000000000..f96a537e3541 --- /dev/null +++ b/sys-libs/libcxx/libcxx-10.0.1_rc3.ebuild @@ -0,0 +1,197 @@ +# Copyright 1999-2020 Gentoo Authors +# Distributed under the terms of the GNU General Public License v2 + +EAPI=7 + +CMAKE_ECLASS=cmake +PYTHON_COMPAT=( python3_{6..9} ) +inherit cmake-multilib llvm llvm.org python-any-r1 toolchain-funcs + +DESCRIPTION="New implementation of the C++ standard library, targeting C++11" +HOMEPAGE="https://libcxx.llvm.org/" +LLVM_COMPONENTS=( libcxx ) +llvm.org_set_globals + +LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )" +SLOT="0" +KEYWORDS="" +IUSE="elibc_glibc elibc_musl +libcxxabi +libunwind +static-libs test" +REQUIRED_USE="libunwind? ( libcxxabi )" +RESTRICT="!test? ( test )" + +RDEPEND=" + libcxxabi? ( ~sys-libs/libcxxabi-${PV}[libunwind=,static-libs?,${MULTILIB_USEDEP}] ) + !libcxxabi? ( >=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} + >=sys-devel/llvm-6" +BDEPEND=" + test? ( >=sys-devel/clang-3.9.0 + $(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]') )" + +DOCS=( CREDITS.TXT ) + +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 && ! tc-is-gcc ; then + eerror "To build ${PN} against libsupc++, you have to use gcc. Other" + eerror "compilers are not supported. Please set CC=gcc and CXX=g++" + eerror "and try again." + die + fi +} + +src_prepare() { + # Add link flag "-Wl,-z,defs" to avoid underlinking; this is needed in a + # out-of-tree build. + eapply "${FILESDIR}/${PN}-3.9-cmake-link-flags.patch" + + llvm.org_src_prepare +} + +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="${EPREFIX}/usr/include/libcxxabi" + else + local gcc_inc="${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 want_compiler_rt=OFF + 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 [[ ${compiler_rt} == *libclang_rt* ]]; then + want_gcc_s=OFF + want_compiler_rt=ON + extra_libs+=( "${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=$(usex test) + -DLIBCXX_USE_COMPILER_RT=${want_compiler_rt} + -DCMAKE_SHARED_LINKER_FLAGS="${extra_libs[*]} ${LDFLAGS}" + ) + + if use test; then + local clang_path=$(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}" + ) + fi + cmake_src_configure +} + +multilib_src_test() { + local -x LIT_PRESERVES_TMP=1 + cmake_build 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=$(usex libcxxabi "libc++abi.a" "libsupc++.a") + + # Move it first. + mv "${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" "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_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." +} |