+DIST llvm-project-92164faf17d553359418b9f49c1a41d680d0de49.tar.gz 245033829 BLAKE2B 7bf707e6455259417864a40c53beba4c4a9f6e4cf983671075016b95e537d2c249f97444089734718b5f2c989a2614028bd22142ccadae9c382e66b28758ecab SHA512 bf4105173144e6bb9cdc99ae67b7350228b37eae248c15aae2ce29877a8ee4cb76781a6beff366961fa366d31683b43421d684d019e25f0280735ccd6c22a432

+# Copyright 1999-2025 Gentoo Authors

+# Distributed under the terms of the GNU General Public License v2

+

+EAPI=8

+

+PYTHON_COMPAT=( python3_{11..14} )

+inherit cmake-multilib crossdev flag-o-matic llvm.org llvm-utils

+inherit python-any-r1 toolchain-funcs

+

+DESCRIPTION="New implementation of the C++ standard library, targeting C++11"

+HOMEPAGE="https://libcxx.llvm.org/"

+

+LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"

+SLOT="0"

+IUSE="+clang +libcxxabi +static-libs test"

+REQUIRED_USE="test? ( clang )"

+RESTRICT="!test? ( test )"

+

+RDEPEND="

+ libcxxabi? (

+ ~llvm-runtimes/libcxxabi-${PV}[static-libs?,${MULTILIB_USEDEP}]

+ )

+ !libcxxabi? ( >=sys-devel/gcc-4.7:=[cxx] )

+"

+DEPEND="

+ ${RDEPEND}

+ llvm-core/llvm:${LLVM_MAJOR}

+"

+BDEPEND="

+ clang? (

+ llvm-core/clang:${LLVM_MAJOR}

+ )

+ !test? (

+ ${PYTHON_DEPS}

+ )

+ test? (

+ dev-debug/gdb[python]

+ $(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')

+ )

+"

+

+LLVM_COMPONENTS=(

+ runtimes libcxx{,abi} libc llvm/{cmake,utils/llvm-lit} cmake

+)

+llvm.org_set_globals

+

+python_check_deps() {

+ use test || return 0

+ python_has_version "dev-python/lit[${PYTHON_USEDEP}]"

+}

+

+pkg_setup() {

+ 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

+}

+

+test_compiler() {

+ $(tc-getCXX) ${CXXFLAGS} ${LDFLAGS} "${@}" -o /dev/null -x c++ - \

+ <<<'int main() { return 0; }' &>/dev/null

+}

+

+src_configure() {

+ local install_prefix=${EPREFIX}

+ is_crosspkg && install_prefix+=/usr/${CTARGET}

+

+ # 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=system-libcxxabi

+ cxxabi_incs="${install_prefix}/usr/include/c++/v1"

+ 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() {

+ # Workaround for bgo #961153.

+ # TODO: Fix the multilib.eclass, so it sets CTARGET properly.

+ if ! is_crosspkg; then

+ export CTARGET=${CHOST}

+ fi

+

+ if use clang; then

+ llvm_prepend_path -b "${LLVM_MAJOR}"

+ local -x CC=${CTARGET}-clang

+ local -x CXX=${CTARGET}-clang++

+ strip-unsupported-flags

+ fi

+

+ # link to compiler-rt

+ local use_compiler_rt=OFF

+ [[ $(tc-get-c-rtlib) == compiler-rt ]] && use_compiler_rt=ON

+

+ # Scenarios to consider:

+ #

+ # 1. Compiler test works with the default flags.

+ # 2. There is a runtime library, but no stdlib. In that case, leave the

+ # LDFLAGS untouched, since there is no self-dependency in libc++.

+ # 3. There is no runtime library nor stdlib. In that case, overwrite the

+ # LDFLAGS.

+ local nostdlib_flags=( -nostdlib --rtlib=compiler-rt -lc )

+ local nort_flags=( -nodefaultlibs -lc )

+ if ! test_compiler && ! test_compiler "${nostdlib_flags[@]}"; then

+ if test_compiler "${nort_flags[@]}"; then

+ local -x LDFLAGS="${LDFLAGS} ${nort_flags[*]}"

+ ewarn "${CXX} seems to lack runtime, trying with ${nort_flags[*]}"

+ fi

+ fi

+

+ local libdir=$(get_libdir)

+ local mycmakeargs=(

+ -DLLVM_ROOT="${ESYSROOT}/usr/lib/llvm/${LLVM_MAJOR}"

+

+ -DCMAKE_CXX_COMPILER_TARGET="${CTARGET}"

+ -DPython3_EXECUTABLE="${PYTHON}"

+ -DLLVM_ENABLE_RUNTIMES=libcxx

+ -DLLVM_INCLUDE_TESTS=OFF

+ -DLLVM_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=$(llvm_cmake_use_musl)

+ -DLIBCXX_INCLUDE_BENCHMARKS=OFF

+ -DLIBCXX_INCLUDE_TESTS=$(usex test)

+ -DLIBCXX_INSTALL_MODULES=ON

+ -DLIBCXX_USE_COMPILER_RT=${use_compiler_rt}

+ # this is broken with standalone builds, and also meaningless

+ -DLIBCXXABI_USE_LLVM_UNWINDER=OFF

+ )

+ if is_crosspkg; then

+ # Needed to target built libc headers

+ local -x CFLAGS="${CFLAGS} -isystem ${ESYSROOT}/usr/${CTARGET}/usr/include"

+ mycmakeargs+=(

+ # Without this, the compiler will compile a test program

+ # and fail due to no builtins.

+ -DCMAKE_C_COMPILER_WORKS=1

+ -DCMAKE_CXX_COMPILER_WORKS=1

+ # Install inside the cross sysroot.

+ -DCMAKE_INSTALL_PREFIX="${EPREFIX}/usr/${CTARGET}/usr"

+ )

+ fi

+ if use test; then

+ mycmakeargs+=(

+ -DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"

+ -DLLVM_LIT_ARGS="$(get_lit_flags)"

+ -DPython3_EXECUTABLE="${PYTHON}"

+ )

+ fi

+ cmake_src_configure

+}

+

+multilib_src_compile() {

+ cmake_src_compile

+ if [[ ${CHOST} != *-darwin* ]] ; then

+ gen_shared_ldscript

+ use static-libs && gen_static_ldscript

+ fi

+}

+

+multilib_src_test() {

+ local -x LIT_PRESERVES_TMP=1

+ cmake_build install-cxx-test-suite-prefix

+ cp "${BUILD_DIR}"/{lib,libcxx/test-suite-install/$(get_libdir)}/libc++_shared.so || die

+ if use static-libs; then

+ cp "${BUILD_DIR}"/{lib,libcxx/test-suite-install/$(get_libdir)}/libc++_static.a || die

+ fi

+ cmake_build check-cxx

+}

+

+multilib_src_install() {

+ cmake_src_install

+ # since we've replaced libc++.{a,so} with ldscripts, now we have to

+ # install the extra symlinks

+ if [[ ${CHOST} != *-darwin* ]] ; then

+ is_crosspkg && into /usr/${CTARGET}

+ dolib.so lib/libc++_shared.so

+ use static-libs && dolib.a lib/libc++_static.a

+ fi

+}

+

+# 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() {

+ # Move it first.

+ mv lib/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

+ $(usex libcxxabi libc++abi.a libsupc++.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[*]}" > lib/libc++.a || die

+}

+

+gen_shared_ldscript() {

+ # Move it first.

+ mv lib/libc++{,_shared}.so || die

+ local deps=(

+ libc++_shared.so

+ # libsupc++ doesn't have a shared version

+ $(usex libcxxabi libc++abi.so libsupc++.a)

+ )

+

+ gen_ldscript "${deps[*]}" > lib/libc++.so || die

+}