| # Copyright 1999-2017 Gentoo Foundation |
| # Distributed under the terms of the GNU General Public License v2 |
| |
| EAPI=5 |
| |
| # Ninja provides better scalability and cleaner verbose output, and is used |
| # throughout all LLVM projects. |
| : ${CMAKE_MAKEFILE_GENERATOR:=ninja} |
| PYTHON_COMPAT=( python2_7 ) |
| |
| inherit cros-constants |
| |
| CROS_WORKON_REPO=${CROS_GIT_AOSP_URL} |
| CROS_WORKON_PROJECT="external/libcxx" |
| CROS_WORKON_LOCALNAME="../aosp/external/libcxx" |
| CROS_WORKON_COMMIT="1e705dad853445419ccc8d35d82de263e91de3f3" |
| CROS_WORKON_TREE="334ca76de56b9d026c1b20885a2a98645b12e8f6" |
| CROS_WORKON_BLACKLIST="1" |
| |
| inherit cmake-multilib cros-llvm cros-workon llvm python-any-r1 toolchain-funcs |
| |
| DESCRIPTION="New implementation of the C++ standard library, targeting C++11" |
| HOMEPAGE="http://libcxx.llvm.org/" |
| |
| LICENSE="|| ( UoI-NCSA MIT )" |
| SLOT="0" |
| KEYWORDS="*" |
| IUSE="cros_host elibc_glibc elibc_musl +libcxxabi libcxxrt libunwind +static-libs test" |
| REQUIRED_USE="libunwind? ( || ( libcxxabi libcxxrt ) ) |
| ?? ( libcxxabi libcxxrt )" |
| |
| RDEPEND=" |
| libcxxabi? ( ${CATEGORY}/libcxxabi[libunwind=,static-libs?,${MULTILIB_USEDEP}] ) |
| libcxxrt? ( ${CATEGORY}/libcxxrt[libunwind=,static-libs?,${MULTILIB_USEDEP}] ) |
| !libcxxabi? ( !libcxxrt? ( >=sys-devel/gcc-4.7:=[cxx] ) )" |
| # clang-3.9.0 installs necessary target symlinks unconditionally |
| # which removes the need for MULTILIB_USEDEP |
| DEPEND="${RDEPEND} |
| cros_host? ( sys-devel/llvm ) |
| test? ( >=sys-devel/clang-3.9.0 |
| $(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]') ) |
| app-arch/xz-utils" |
| |
| S=${WORKDIR}/${P/_/}.src |
| |
| 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" |
| ) |
| |
| python_check_deps() { |
| has_version "dev-python/lit[${PYTHON_USEDEP}]" |
| } |
| |
| src_prepare() { |
| # Remove a symoblic link pointing to some location |
| # outside of the source tree. crbug.com/740232 |
| rm "include/__cxxabi_config.h" |
| } |
| |
| pkg_setup() { |
| setup_cross_toolchain |
| 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 |
| } |
| |
| multilib_src_configure() { |
| local cxxabi cxxabi_incs |
| if use libcxxabi; then |
| cxxabi=libcxxabi |
| cxxabi_incs="${SYSROOT}/${PREFIX}/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 |
| # Use vfpv3 to be able to target non-neon targets. |
| if [[ $(tc-arch) == "arm" ]] ; then |
| append-flags -mfpu=vfpv3 |
| fi |
| |
| # 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 |
| # get the full library list out of 'pretend mode' |
| # and grep it for libclang_rt references |
| local args=( $($(tc-getCC) -### -x c - 2>&1 | tail -n 1) ) |
| local i |
| for i in "${args[@]}"; do |
| if [[ ${i} == *libclang_rt* ]]; then |
| want_gcc_s=OFF |
| extra_libs+=( "${i}" ) |
| fi |
| done |
| fi |
| fi |
| |
| append-flags "-stdlib=libstdc++" |
| 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_INSTALL_PREFIX=${PREFIX} |
| -DCMAKE_SHARED_LINKER_FLAGS="${extra_libs[*]} ${LDFLAGS}" |
| ) |
| |
| if use test; then |
| mycmakeargs+=( |
| # this can be any directory, it just needs to exist... |
| # FIXME: remove this once https://reviews.llvm.org/D25093 is merged |
| -DLLVM_MAIN_SRC_DIR="${T}" |
| -DLIT_COMMAND="${EPREFIX}"/usr/bin/lit |
| ) |
| fi |
| cmake-utils_src_configure |
| } |
| |
| multilib_src_test() { |
| local clang_path=$(type -P "${CHOST:+${CHOST}-}clang" 2>/dev/null) |
| |
| [[ -n ${clang_path} ]] || die "Unable to find ${CHOST}-clang for tests" |
| sed -i -e "/cxx_under_test/s^\".*\"^\"${clang_path}\"^" test/lit.site.cfg || die |
| |
| 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 "${ED}/${PREFIX}/${libdir}/libc++.a" "${ED}/${PREFIX}/${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}" > "${ED}/${PREFIX}/${libdir}/libc++.a" || die |
| } |
| |
| gen_shared_ldscript() { |
| local libdir=$(get_libdir) |
| # libsupc++ doesn't have a shared version |
| local cxxabi_lib=$(usex libcxxabi "libc++abi.so" "$(usex libcxxrt "libcxxrt.so" "libsupc++.a")") |
| mv "${ED}/${PREFIX}/${libdir}/libc++.so" "${ED}/${PREFIX}/${libdir}/libc++_shared.so" || die |
| local deps="libc++_shared.so ${cxxabi_lib} $(usex libunwind libunwind.so libgcc_s.so)" |
| |
| gen_ldscript "${deps}" > "${ED}/${PREFIX}/${libdir}/libc++.so" || die |
| } |
| |
| multilib_src_install() { |
| cmake-utils_src_install |
| gen_shared_ldscript |
| use static-libs && gen_static_ldscript |
| } |
| |
| multilib_src_install_all() { |
| if [[ ${CATEGORY} == cross-* ]]; then |
| rm -r "${ED}/usr/share/doc" |
| fi |
| } |
| |
| 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." |
| } |