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# Copyright 1999-2021 Gentoo Authors
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# Distributed under the terms of the GNU General Public License v2
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EAPI=7
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CMAKE_ECLASS=cmake
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PYTHON_COMPAT=( python3_{8..10} )
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inherit cmake-multilib llvm llvm.org python-any-r1 toolchain-funcs
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DESCRIPTION="C++ runtime stack unwinder from LLVM"
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HOMEPAGE="https://github.com/llvm-mirror/libunwind"
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LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
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SLOT="0"
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KEYWORDS=""
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IUSE="debug static-libs test"
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RESTRICT="!test? ( test )"
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RDEPEND="!sys-libs/libunwind"
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# llvm-6 for new lit options
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DEPEND="
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>=sys-devel/llvm-6"
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BDEPEND="
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test? ( >=sys-devel/clang-3.9.0
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$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
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)"
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LLVM_COMPONENTS=( libunwind libcxx llvm/cmake )
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LLVM_TEST_COMPONENTS=( libcxxabi )
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llvm.org_set_globals
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python_check_deps() {
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has_version "dev-python/lit[${PYTHON_USEDEP}]"
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}
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pkg_setup() {
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use test && python-any-r1_pkg_setup
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}
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multilib_src_configure() {
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local use_compiler_rt=OFF
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local libdir=$(get_libdir)
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# link to compiler-rt
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# https://github.com/gentoo/gentoo/pull/21516
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if tc-is-clang; then
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local compiler_rt=$($(tc-getCC) ${CFLAGS} ${CPPFLAGS} \
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${LD_FLAGS} -print-libgcc-file-name)
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if [[ ${compiler_rt} == *libclang_rt* ]]; then
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use_compiler_rt=ON
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fi
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fi
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local mycmakeargs=(
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-DLLVM_LIBDIR_SUFFIX=${libdir#lib}
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-DLIBUNWIND_ENABLE_ASSERTIONS=$(usex debug)
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-DLIBUNWIND_ENABLE_STATIC=$(usex static-libs)
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-DLIBUNWIND_TARGET_TRIPLE="${CHOST}"
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-DLLVM_INCLUDE_TESTS=$(usex test)
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# support non-native unwinding; given it's small enough,
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# enable it unconditionally
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-DLIBUNWIND_ENABLE_CROSS_UNWINDING=ON
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# avoid dependency on libgcc_s if compiler-rt is used
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-DLIBUNWIND_USE_COMPILER_RT=${use_compiler_rt}
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)
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if use test; then
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local clang_path=$(type -P "${CHOST:+${CHOST}-}clang" 2>/dev/null)
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[[ -n ${clang_path} ]] || die "Unable to find ${CHOST}-clang for tests"
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mycmakeargs+=(
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-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
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-DLLVM_LIT_ARGS="$(get_lit_flags);--param=cxx_under_test=${clang_path}"
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-DLIBUNWIND_LIBCXX_PATH="${WORKDIR}/libcxx"
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)
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fi
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cmake_src_configure
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}
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wrap_libcxxabi() {
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local mycmakeargs=(
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-DLIBCXXABI_LIBDIR_SUFFIX=
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-DLIBCXXABI_ENABLE_SHARED=OFF
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-DLIBCXXABI_ENABLE_STATIC=ON
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-DLIBCXXABI_USE_LLVM_UNWINDER=ON
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-DLIBCXXABI_INCLUDE_TESTS=OFF
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-DLIBCXXABI_LIBCXX_INCLUDES="${BUILD_DIR}"/libcxx/include/c++/v1
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-DLIBCXXABI_LIBUNWIND_INCLUDES="${S}"/include
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)
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local -x LDFLAGS="${LDFLAGS} -L${BUILD_DIR}/$(get_libdir)"
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local CMAKE_USE_DIR=${WORKDIR}/libcxxabi
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local BUILD_DIR=${BUILD_DIR}/libcxxabi
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"${@}"
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}
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wrap_libcxx() {
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local mycmakeargs=(
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-DLIBCXX_LIBDIR_SUFFIX=
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-DLIBCXX_ENABLE_SHARED=OFF
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-DLIBCXX_ENABLE_STATIC=ON
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-DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF
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-DLIBCXXABI_USE_LLVM_UNWINDER=ON
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-DLIBCXX_CXX_ABI=libcxxabi
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-DLIBCXX_CXX_ABI_INCLUDE_PATHS="${WORKDIR}"/libcxxabi/include
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-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
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-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
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-DLIBCXX_HAS_GCC_S_LIB=OFF
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-DLIBCXX_INCLUDE_TESTS=OFF
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)
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local -x LDFLAGS="${LDFLAGS} -L${BUILD_DIR}/libcxxabi/lib -L${BUILD_DIR}/$(get_libdir)"
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local CMAKE_USE_DIR=${WORKDIR}/libcxx
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local BUILD_DIR=${BUILD_DIR}/libcxx
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"${@}"
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}
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multilib_src_test() {
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# build local copies of libc++ & libc++abi for testing to avoid
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# circular deps
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wrap_libcxx cmake_src_configure
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wrap_libcxx cmake_build generate-cxx-headers
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wrap_libcxxabi cmake_src_configure
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wrap_libcxxabi cmake_src_compile
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wrap_libcxx cmake_src_compile
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mv "${BUILD_DIR}"/libcxx*/lib/libc++* "${BUILD_DIR}/$(get_libdir)/" || die
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local -x LIT_PRESERVES_TMP=1
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cmake_build check-unwind
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}
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multilib_src_install() {
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cmake_src_install
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# install headers like sys-libs/libunwind
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doheader "${S}"/include/*.h
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}
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