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|
# Copyright 1999-2025 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
PYTHON_COMPAT=( python3_{10..13} )
inherit cmake crossdev flag-o-matic llvm.org llvm-utils python-any-r1
inherit toolchain-funcs
DESCRIPTION="Compiler runtime library for clang, compatible with libgcc_s"
HOMEPAGE="https://llvm.org/"
LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
SLOT="0"
IUSE="debug test"
DEPEND="
~llvm-runtimes/libunwind-${PV}[static-libs]
"
RDEPEND="
${DEPEND}
!sys-devel/gcc
"
BDEPEND="
llvm-core/clang:${LLVM_MAJOR}
test? (
$(python_gen_any_dep ">=dev-python/lit-15[\${PYTHON_USEDEP}]")
=llvm-core/clang-${LLVM_VERSION}*:${LLVM_MAJOR}
)
!test? (
${PYTHON_DEPS}
)
"
LLVM_COMPONENTS=( compiler-rt cmake llvm/cmake llvm-libgcc )
LLVM_TEST_COMPONENTS=( llvm/include/llvm/TargetParser )
llvm.org_set_globals
python_check_deps() {
use test || return 0
python_has_version ">=dev-python/lit-15[${PYTHON_USEDEP}]"
}
pkg_setup() {
if target_is_not_host || tc-is-cross-compiler ; then
# strips vars like CFLAGS="-march=x86_64-v3" for non-x86 architectures
CHOST=${CTARGET} strip-unsupported-flags
# overrides host docs otherwise
DOCS=()
fi
python-any-r1_pkg_setup
}
src_configure() {
# We need to build a separate copy of compiler-rt, because we need to disable the
# COMPILER_RT_BUILTINS_HIDE_SYMBOLS option - compatibility with libgcc requires
# visibility of all symbols.
llvm_prepend_path "${LLVM_MAJOR}"
# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
export CC=${CTARGET}-clang CXX=${CTARGET}-clang++
strip-unsupported-flags
local mycmakeargs=(
-DCOMPILER_RT_INSTALL_PATH="${EPREFIX}/usr/lib/clang/${LLVM_MAJOR}"
-DCOMPILER_RT_INCLUDE_TESTS=$(usex test)
-DCOMPILER_RT_BUILD_CRT=OFF
-DCOMPILER_RT_BUILD_CTX_PROFILE=OFF
-DCOMPILER_RT_BUILD_LIBFUZZER=OFF
-DCOMPILER_RT_BUILD_MEMPROF=OFF
-DCOMPILER_RT_BUILD_ORC=OFF
-DCOMPILER_RT_BUILD_PROFILE=OFF
-DCOMPILER_RT_BUILD_SANITIZERS=OFF
-DCOMPILER_RT_BUILD_XRAY=OFF
-DCOMPILER_RT_BUILTINS_HIDE_SYMBOLS=OFF
-DPython3_EXECUTABLE="${PYTHON}"
)
# disable building non-native runtimes since we don't do multilib
if use amd64; then
mycmakeargs+=(
-DCAN_TARGET_i386=OFF
)
fi
if use test; then
mycmakeargs+=(
-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
-DLLVM_LIT_ARGS="$(get_lit_flags)"
-DCOMPILER_RT_TEST_COMPILER="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/bin/clang"
-DCOMPILER_RT_TEST_CXX_COMPILER="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/bin/clang++"
)
fi
cmake_src_configure
}
# Usage: deps
gen_ldscript() {
local output_format
output_format=$($(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 ( $@ )
END_LDSCRIPT
}
src_compile() {
cmake_src_compile
local rtlib=$(
"${CC}" -rtlib=compiler-rt -resource-dir="${BUILD_DIR}" \
-print-libgcc-file-name || die
)
# Use the llvm-libgcc's version script to produce libgcc.{a,so}, which
# combines compiler-rt and libunwind into a libgcc replacement.
#
# What we do here is similar to what upstream does[0], with the following
# differences:
#
# * We build the local copy of compiler-rt manually, to have a full control
# over CMake options.
# * Upstream links the locally built copy of libunwind statically. We link the
# system-wide libunwind dynamically.
#
# [0] https://github.com/llvm/llvm-project/blob/llvmorg-19.1.7/llvm-libgcc/CMakeLists.txt#L102-L120
"${CC}" -E -xc \
"${WORKDIR}/llvm-libgcc/gcc_s.ver.in" \
-o gcc_s.ver || die
"${CC}" -nostdlib \
${LDFLAGS} \
-Wl,--version-script,gcc_s.ver \
-Wl,--undefined-version \
-Wl,--whole-archive \
"${rtlib}" \
-Wl,-soname,libgcc_s.so.1.0 \
-lc -lunwind -shared \
-o libgcc_s.so.1.0 || die
# Generate libgcc_s.so ldscript for inclusion of libunwind as a
# dependency so that `clang -lgcc_s` works out of the box.
gen_ldscript libgcc_s.so.1.0 libunwind.so.1.0 > libgcc_s.so || die
cp "${rtlib}" libgcc.a || die
}
src_test() {
# respect TMPDIR!
local -x LIT_PRESERVES_TMP=1
cmake_build check-builtins
}
src_install() {
local libdir=$(get_libdir)
dolib.so libgcc_s.so.1.0 libgcc_s.so
dolib.a libgcc.a
dosym libgcc_s.so.1.0 "/usr/${libdir}/libgcc_s.so.1"
dosym libunwind.a "/usr/${libdir}/libgcc_eh.a"
}
|
