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# Copyright 1999-2023 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
PYTHON_COMPAT=( python3_{10..12} )
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"
IUSE="+clang +debug static-libs test"
REQUIRED_USE="test? ( clang )"
RESTRICT="!test? ( test )"
RDEPEND="
!sys-libs/libunwind
"
DEPEND="
sys-devel/llvm:${LLVM_MAJOR}
"
BDEPEND="
clang? (
sys-devel/clang:${LLVM_MAJOR}
)
!test? (
${PYTHON_DEPS}
)
test? (
$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
)
"
LLVM_COMPONENTS=( runtimes libunwind libcxx llvm/cmake cmake )
LLVM_TEST_COMPONENTS=( libcxxabi llvm/utils/llvm-lit )
llvm.org_set_globals
python_check_deps() {
use test || return 0
python_has_version "dev-python/lit[${PYTHON_USEDEP}]"
}
pkg_setup() {
LLVM_MAX_SLOT=${LLVM_MAJOR} llvm_pkg_setup
python-any-r1_pkg_setup
}
multilib_src_configure() {
local libdir=$(get_libdir)
# https://github.com/llvm/llvm-project/issues/56825
# also separately bug #863917
filter-lto
if use clang; then
local -x CC=${CHOST}-clang
local -x CXX=${CHOST}-clang++
strip-unsupported-flags
fi
# link to compiler-rt
# https://github.com/gentoo/gentoo/pull/21516
local use_compiler_rt=OFF
[[ $(tc-get-c-rtlib) == compiler-rt ]] && use_compiler_rt=ON
# Respect upstream build type assumptions (bug #910436) where they do:
# -DLIBUNWIND_ENABLE_ASSERTIONS=ON =>
# -DCMAKE_BUILD_TYPE=DEBUG => -UNDEBUG
# -DCMAKE_BUILD_TYPE!=debug => -DNDEBUG
# -DLIBUNWIND_ENABLE_ASSERTIONS=OFF =>
# -UNDEBUG
# See also https://github.com/llvm/llvm-project/issues/86#issuecomment-1649668826.
use debug || append-cppflags -DNDEBUG
local mycmakeargs=(
-DCMAKE_CXX_COMPILER_TARGET="${CHOST}"
-DPython3_EXECUTABLE="${PYTHON}"
-DLLVM_ENABLE_RUNTIMES="libunwind"
-DLLVM_LIBDIR_SUFFIX=${libdir#lib}
-DLLVM_INCLUDE_TESTS=OFF
-DLIBUNWIND_ENABLE_ASSERTIONS=$(usex debug)
-DLIBUNWIND_ENABLE_STATIC=$(usex static-libs)
-DLIBUNWIND_INCLUDE_TESTS=$(usex test)
-DLIBUNWIND_INSTALL_HEADERS=ON
# support non-native unwinding; given it's small enough,
# enable it unconditionally
-DLIBUNWIND_ENABLE_CROSS_UNWINDING=ON
# avoid dependency on libgcc_s if compiler-rt is used
-DLIBUNWIND_USE_COMPILER_RT=${use_compiler_rt}
)
if use test; then
mycmakeargs+=(
-DLLVM_ENABLE_RUNTIMES="libunwind;libcxxabi;libcxx"
-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
-DLLVM_LIT_ARGS="$(get_lit_flags)"
-DLIBUNWIND_LIBCXX_PATH="${WORKDIR}/libcxx"
-DLIBCXXABI_LIBDIR_SUFFIX=
-DLIBCXXABI_ENABLE_SHARED=OFF
-DLIBCXXABI_ENABLE_STATIC=ON
-DLIBCXXABI_USE_LLVM_UNWINDER=ON
-DLIBCXXABI_INCLUDE_TESTS=OFF
-DLIBCXX_LIBDIR_SUFFIX=
-DLIBCXX_ENABLE_SHARED=OFF
-DLIBCXX_ENABLE_STATIC=ON
-DLIBCXX_CXX_ABI=libcxxabi
-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
-DLIBCXX_HAS_GCC_S_LIB=OFF
-DLIBCXX_INCLUDE_TESTS=OFF
-DLIBCXX_INCLUDE_BENCHMARKS=OFF
)
fi
cmake_src_configure
}
multilib_src_test() {
local -x LIT_PRESERVES_TMP=1
cmake_build check-unwind
}
multilib_src_install() {
DESTDIR=${D} cmake_build install-unwind
}
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