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# Copyright 1999-2017 Gentoo Foundation
# 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.
: ${CMAKE_MAKEFILE_GENERATOR:=ninja}
PYTHON_COMPAT=( python3_6 )
inherit cmake-multilib cros-constants cros-llvm git-2 llvm python-any-r1 toolchain-funcs
DESCRIPTION="New implementation of the C++ standard library, targeting C++11"
HOMEPAGE="http://libcxx.llvm.org/"
SRC_URI=""
EGIT_REPO_URI="${CROS_GIT_HOST_URL}/external/github.com/llvm/llvm-project
${CROS_GIT_HOST_URL}/external/github.com/llvm/llvm-project"
LLVM_HASH="f402e682d0ef5598eeffc9a21a691b03e602ff58" # r408248
LLVM_NEXT_HASH="f402e682d0ef5598eeffc9a21a691b03e602ff58" # r408248
LICENSE="|| ( UoI-NCSA MIT )"
SLOT="0"
KEYWORDS="*"
IUSE="+compiler-rt cros_host elibc_glibc elibc_musl +libcxxabi libcxxrt libunwind llvm-next llvm-tot msan +static-libs"
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] ) )
!cros_host? ( sys-libs/gcc-libs )"
DEPEND="${RDEPEND}
cros_host? ( sys-devel/llvm )
app-arch/xz-utils"
python_check_deps() {
has_version "dev-python/lit[${PYTHON_USEDEP}]"
}
src_unpack() {
if use llvm-next || use llvm-tot; then
export EGIT_COMMIT="${LLVM_NEXT_HASH}"
else
export EGIT_COMMIT="${LLVM_HASH}"
fi
git-2_src_unpack
}
src_prepare() {
"${FILESDIR}"/patch_manager/patch_manager.py \
--svn_version "$(get_most_recent_revision)" \
--patch_metadata_file "${FILESDIR}"/PATCHES.json \
--filesdir_path "${FILESDIR}" \
--src_path "${S}" || die
eapply_user
}
pkg_setup() {
setup_cross_toolchain
llvm_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
export CMAKE_USE_DIR="${S}/libcxx"
}
multilib_src_configure() {
# Filter sanitzers flags.
filter_sanitizers
cros_optimize_package_for_speed
local cxxabi cxxabi_incs
if use libcxxabi; then
cxxabi=libcxxabi
cxxabi_incs="${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 || use compiler-rt; then
# work-around missing -lunwind upstream
use libunwind && 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=$(get_libdir)
local mycmakeargs=(
"-DLLVM_ENABLE_PROJECTS=libcxx"
"-DLIBCXX_LIBDIR_SUFFIX=${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=${want_gcc_s}"
"-DLIBCXX_USE_COMPILER_RT=$(usex compiler-rt)"
"-DLIBCXX_INCLUDE_TESTS=OFF"
"-DLIBCXXABI_USE_LLVM_UNWINDER=$(usex libunwind)"
"-DCMAKE_INSTALL_PREFIX=${PREFIX}"
"-DCMAKE_SHARED_LINKER_FLAGS=${extra_libs[*]} ${LDFLAGS}"
)
if use msan; then
mycmakeargs+=(
"-DLLVM_USE_SANITIZER=Memory"
)
fi
cmake-utils_src_configure
}
# Usage: deps
gen_ldscript() {
local output_format
output_format=$($(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 compiler-rt '' $(usex libunwind libunwind.so libgcc_s.so))"
gen_ldscript "${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
}