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# Copyright 1999-2023 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=7
PYTHON_COMPAT=( python3_{9..10} )
inherit cmake-multilib flag-o-matic llvm llvm.org python-any-r1 toolchain-funcs
DESCRIPTION="C++ runtime stack unwinder from LLVM"
HOMEPAGE="https://llvm.org/docs/ExceptionHandling.html"
LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
SLOT="0"
KEYWORDS="amd64 arm arm64 ~ppc ppc64 ~riscv x86 ~x64-macos"
IUSE="debug static-libs test"
RESTRICT="!test? ( test )"
RDEPEND="!sys-libs/libunwind"
# llvm-6 for new lit options
DEPEND="
>=sys-devel/llvm-6"
BDEPEND="
test? ( >=sys-devel/clang-3.9.0
$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
)"
LLVM_COMPONENTS=( libunwind libcxx llvm/cmake )
LLVM_TEST_COMPONENTS=( libcxxabi )
LLVM_PATCHSET=${PV/_/-}
llvm.org_set_globals
python_check_deps() {
python_has_version "dev-python/lit[${PYTHON_USEDEP}]"
}
pkg_setup() {
use test && python-any-r1_pkg_setup
}
multilib_src_configure() {
local libdir=$(get_libdir)
# https://github.com/llvm/llvm-project/issues/56825
# also separately bug #863917
filter-lto
# link to compiler-rt
# https://github.com/gentoo/gentoo/pull/21516
local use_compiler_rt=OFF
[[ $(tc-get-c-rtlib) == compiler-rt ]] && use_compiler_rt=ON
local mycmakeargs=(
-DLLVM_LIBDIR_SUFFIX=${libdir#lib}
-DLIBUNWIND_ENABLE_ASSERTIONS=$(usex debug)
-DLIBUNWIND_ENABLE_STATIC=$(usex static-libs)
-DLIBUNWIND_TARGET_TRIPLE="${CHOST}"
-DLLVM_INCLUDE_TESTS=$(usex test)
# support non-native unwinding; given it's small enough,
# enable it unconditionally
-DLIBUNWIND_ENABLE_CROSS_UNWINDING=ON
# avoid dependency on libgcc_s if compiler-rt is used
-DLIBUNWIND_USE_COMPILER_RT=${use_compiler_rt}
)
if use test; then
local clang_path=$(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}"
-DLIBUNWIND_LIBCXX_PATH="${WORKDIR}/libcxx"
)
fi
cmake_src_configure
}
wrap_libcxxabi() {
local mycmakeargs=(
-DLIBCXXABI_LIBDIR_SUFFIX=
-DLIBCXXABI_ENABLE_SHARED=OFF
-DLIBCXXABI_ENABLE_STATIC=ON
-DLIBCXXABI_USE_LLVM_UNWINDER=ON
-DLIBCXXABI_INCLUDE_TESTS=OFF
-DLIBCXXABI_LIBCXX_INCLUDES="${BUILD_DIR}"/libcxx/include/c++/v1
-DLIBCXXABI_LIBUNWIND_INCLUDES="${S}"/include
)
local -x LDFLAGS="${LDFLAGS} -L${BUILD_DIR}/$(get_libdir)"
local CMAKE_USE_DIR=${WORKDIR}/libcxxabi
local BUILD_DIR=${BUILD_DIR}/libcxxabi
"${@}"
}
wrap_libcxx() {
local mycmakeargs=(
-DLIBCXX_LIBDIR_SUFFIX=
-DLIBCXX_ENABLE_SHARED=OFF
-DLIBCXX_ENABLE_STATIC=ON
-DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF
-DLIBCXXABI_USE_LLVM_UNWINDER=ON
-DLIBCXX_CXX_ABI=libcxxabi
-DLIBCXX_CXX_ABI_INCLUDE_PATHS="${WORKDIR}"/libcxxabi/include
-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
-DLIBCXX_HAS_GCC_S_LIB=OFF
-DLIBCXX_INCLUDE_TESTS=OFF
)
local -x LDFLAGS="${LDFLAGS} -L${BUILD_DIR}/libcxxabi/lib -L${BUILD_DIR}/$(get_libdir)"
local CMAKE_USE_DIR=${WORKDIR}/libcxx
local BUILD_DIR=${BUILD_DIR}/libcxx
"${@}"
}
multilib_src_test() {
# build local copies of libc++ & libc++abi for testing to avoid
# circular deps
wrap_libcxx cmake_src_configure
wrap_libcxx cmake_build generate-cxx-headers
wrap_libcxxabi cmake_src_configure
wrap_libcxxabi cmake_src_compile
wrap_libcxx cmake_src_compile
mv "${BUILD_DIR}"/libcxx*/lib/libc++* "${BUILD_DIR}/$(get_libdir)/" || die
local -x LIT_PRESERVES_TMP=1
cmake_build check-unwind
}
multilib_src_install() {
cmake_src_install
# install headers like sys-libs/libunwind
doheader "${S}"/include/*.h
}
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