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# Copyright 1999-2024 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
PYTHON_COMPAT=( python3_{10..12} )
inherit cmake crossdev flag-o-matic llvm llvm.org python-any-r1 toolchain-funcs
DESCRIPTION="Compiler runtime library for clang (built-in part)"
HOMEPAGE="https://llvm.org/"
LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
SLOT="${LLVM_MAJOR}"
KEYWORDS="amd64 arm arm64 ~loong ppc64 ~riscv x86 ~amd64-linux ~arm64-macos ~ppc-macos ~x64-macos"
IUSE="+abi_x86_32 abi_x86_64 +clang debug test"
RESTRICT="!test? ( test ) !clang? ( test )"
DEPEND="
sys-devel/llvm:${LLVM_MAJOR}
"
BDEPEND="
clang? ( sys-devel/clang:${LLVM_MAJOR} )
test? (
$(python_gen_any_dep ">=dev-python/lit-15[\${PYTHON_USEDEP}]")
=sys-devel/clang-${LLVM_VERSION}*:${LLVM_MAJOR}
)
!test? (
${PYTHON_DEPS}
)
"
LLVM_COMPONENTS=( compiler-rt cmake llvm/cmake )
LLVM_PATCHSET=${PV}-r4
llvm.org_set_globals
python_check_deps() {
use test || return 0
python_has_version ">=dev-python/lit-15[${PYTHON_USEDEP}]"
}
pkg_pretend() {
if ! use clang && ! tc-is-clang; then
ewarn "Building using a compiler other than clang may result in broken atomics"
ewarn "library. Enable USE=clang unless you have a very good reason not to."
fi
}
pkg_setup() {
# Darwin Prefix builds do not have llvm installed yet, so rely on
# bootstrap-prefix to set the appropriate path vars to LLVM instead
# of using llvm_pkg_setup.
if [[ ${CHOST} != *-darwin* ]] || has_version sys-devel/llvm; then
LLVM_MAX_SLOT=${LLVM_MAJOR} llvm_pkg_setup
fi
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
}
test_compiler() {
target_is_not_host && return
$(tc-getCC) ${CFLAGS} ${LDFLAGS} "${@}" -o /dev/null -x c - \
<<<'int main() { return 0; }' &>/dev/null
}
src_configure() {
# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
# pre-set since we need to pass it to cmake
BUILD_DIR=${WORKDIR}/${P}_build
if use clang && ! is_crosspkg; then
# Only do this conditionally to allow overriding with
# e.g. CC=clang-13 in case of breakage
if ! tc-is-clang ; then
local -x CC=${CHOST}-clang
local -x CXX=${CHOST}-clang++
fi
strip-unsupported-flags
fi
if ! is_crosspkg && ! test_compiler ; then
local nolib_flags=( -nodefaultlibs -lc )
if test_compiler "${nolib_flags[@]}"; then
local -x LDFLAGS="${LDFLAGS} ${nolib_flags[*]}"
ewarn "${CC} seems to lack runtime, trying with ${nolib_flags[*]}"
elif test_compiler "${nolib_flags[@]}" -nostartfiles; then
# Avoiding -nostartfiles earlier on for bug #862540,
# and set available entry symbol for bug #862798.
nolib_flags+=( -nostartfiles -emain )
local -x LDFLAGS="${LDFLAGS} ${nolib_flags[*]}"
ewarn "${CC} seems to lack runtime, trying with ${nolib_flags[*]}"
fi
fi
local mycmakeargs=(
-DCOMPILER_RT_INSTALL_PATH="${EPREFIX}/usr/lib/clang/${LLVM_MAJOR}"
-DCOMPILER_RT_INCLUDE_TESTS=$(usex test)
-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
-DPython3_EXECUTABLE="${PYTHON}"
)
if use amd64 && ! target_is_not_host; then
mycmakeargs+=(
-DCAN_TARGET_i386=$(usex abi_x86_32)
-DCAN_TARGET_x86_64=$(usex abi_x86_64)
)
fi
if is_crosspkg; then
# Needed to target built libc headers
export CFLAGS="${CFLAGS} -isystem /usr/${CTARGET}/usr/include"
mycmakeargs+=(
# Without this, the compiler will compile a test program
# and fail due to no builtins.
-DCMAKE_C_COMPILER_WORKS=1
-DCMAKE_CXX_COMPILER_WORKS=1
# Without this, compiler-rt install location is not unique
# to target triples, only to architecture.
# Needed if you want to target multiple libcs for one arch.
-DLLVM_ENABLE_PER_TARGET_RUNTIME_DIR=ON
-DCMAKE_ASM_COMPILER_TARGET="${CTARGET}"
-DCMAKE_C_COMPILER_TARGET="${CTARGET}"
-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON
)
fi
if use prefix && [[ "${CHOST}" == *-darwin* ]] ; then
mycmakeargs+=(
# setting -isysroot is disabled with compiler-rt-prefix-paths.patch
# this allows adding arm64 support using SDK in EPREFIX
-DDARWIN_macosx_CACHED_SYSROOT="${EPREFIX}/MacOSX.sdk"
# Set version based on the SDK in EPREFIX.
# This disables i386 for SDK >= 10.15
-DDARWIN_macosx_OVERRIDE_SDK_VERSION="$(realpath ${EPREFIX}/MacOSX.sdk | sed -e 's/.*MacOSX\(.*\)\.sdk/\1/')"
# Use our libtool instead of looking it up with xcrun
-DCMAKE_LIBTOOL="${EPREFIX}/usr/bin/${CHOST}-libtool"
)
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
}
src_test() {
# respect TMPDIR!
local -x LIT_PRESERVES_TMP=1
cmake_build check-builtins
}
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