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# Copyright 1999-2022 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
PYTHON_COMPAT=( python3_{8..11} )
inherit check-reqs cmake flag-o-matic llvm llvm.org python-any-r1
DESCRIPTION="Compiler runtime libraries for clang (sanitizers & xray)"
HOMEPAGE="https://llvm.org/"
LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
SLOT="${LLVM_VERSION}"
KEYWORDS="~amd64 arm arm64 ppc64 ~riscv x86 ~amd64-linux ~ppc-macos ~x64-macos"
IUSE="+abi_x86_32 abi_x86_64 +clang debug test"
# base targets
IUSE+=" +libfuzzer +memprof +orc +profile +xray"
# sanitizer targets, keep in sync with config-ix.cmake
# NB: ubsan, scudo deliberately match two entries
SANITIZER_FLAGS=(
asan dfsan lsan msan hwasan tsan ubsan safestack cfi scudo
shadowcallstack gwp-asan
)
IUSE+=" ${SANITIZER_FLAGS[@]/#/+}"
REQUIRED_USE="
|| ( ${SANITIZER_FLAGS[*]} libfuzzer orc profile xray )
test? (
cfi? ( ubsan )
gwp-asan? ( scudo )
)
"
RESTRICT="
!clang? ( test )
!test? ( test )
"
DEPEND="
sys-devel/llvm:${LLVM_MAJOR}
virtual/libcrypt[abi_x86_32(-)?,abi_x86_64(-)?]
"
BDEPEND="
>=dev-util/cmake-3.16
clang? ( sys-devel/clang )
elibc_glibc? ( net-libs/libtirpc )
test? (
!!<sys-apps/sandbox-2.13
$(python_gen_any_dep ">=dev-python/lit-15[\${PYTHON_USEDEP}]")
=sys-devel/clang-${LLVM_VERSION}*:${LLVM_MAJOR}
sys-libs/compiler-rt:${LLVM_VERSION}
)
!test? (
${PYTHON_DEPS}
)
"
LLVM_COMPONENTS=( compiler-rt cmake llvm/cmake )
LLVM_TEST_COMPONENTS=( llvm/lib/Testing/Support llvm/utils/unittest )
LLVM_PATCHSET=${PV/_/-}
llvm.org_set_globals
python_check_deps() {
use test || return 0
python_has_version ">=dev-python/lit-15[${PYTHON_USEDEP}]"
}
check_space() {
if use test; then
local CHECKREQS_DISK_BUILD=11G
check-reqs_pkg_pretend
fi
}
pkg_pretend() {
check_space
}
pkg_setup() {
check_space
LLVM_MAX_SLOT=${LLVM_MAJOR} llvm_pkg_setup
python-any-r1_pkg_setup
}
src_prepare() {
sed -i -e 's:-Werror::' lib/tsan/go/buildgo.sh || die
local flag
for flag in "${SANITIZER_FLAGS[@]}"; do
if ! use "${flag}"; then
local cmake_flag=${flag/-/_}
sed -i -e "/COMPILER_RT_HAS_${cmake_flag^^}/s:TRUE:FALSE:" \
cmake/config-ix.cmake || die
fi
done
# TODO: fix these tests to be skipped upstream
if use asan && ! use profile; then
rm test/asan/TestCases/asan_and_llvm_coverage_test.cpp || die
fi
if use ubsan && ! use cfi; then
> test/cfi/CMakeLists.txt || die
fi
llvm.org_src_prepare
}
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}/compiler-rt_build
if use clang; then
local -x CC=${CHOST}-clang
local -x CXX=${CHOST}-clang++
strip-unsupported-flags
fi
local flag want_sanitizer=OFF
for flag in "${SANITIZER_FLAGS[@]}"; do
if use "${flag}"; then
want_sanitizer=ON
break
fi
done
local mycmakeargs=(
-DCOMPILER_RT_INSTALL_PATH="${EPREFIX}/usr/lib/clang/${LLVM_VERSION}"
# use a build dir structure consistent with install
# this makes it possible to easily deploy test-friendly clang
-DCOMPILER_RT_OUTPUT_DIR="${BUILD_DIR}/lib/clang/${LLVM_VERSION}"
-DCOMPILER_RT_INCLUDE_TESTS=$(usex test)
# builtins & crt installed by sys-libs/compiler-rt
-DCOMPILER_RT_BUILD_BUILTINS=OFF
-DCOMPILER_RT_BUILD_CRT=OFF
-DCOMPILER_RT_BUILD_LIBFUZZER=$(usex libfuzzer)
-DCOMPILER_RT_BUILD_MEMPROF=$(usex memprof)
-DCOMPILER_RT_BUILD_ORC=$(usex orc)
-DCOMPILER_RT_BUILD_PROFILE=$(usex profile)
-DCOMPILER_RT_BUILD_SANITIZERS="${want_sanitizer}"
-DCOMPILER_RT_BUILD_XRAY=$(usex xray)
-DPython3_EXECUTABLE="${PYTHON}"
)
if use amd64; then
mycmakeargs+=(
-DCAN_TARGET_i386=$(usex abi_x86_32)
-DCAN_TARGET_x86_64=$(usex abi_x86_64)
)
fi
if use test; then
mycmakeargs+=(
-DLLVM_MAIN_SRC_DIR="${WORKDIR}/llvm"
-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
-DLLVM_LIT_ARGS="$(get_lit_flags)"
# they are created during src_test()
-DCOMPILER_RT_TEST_COMPILER="${BUILD_DIR}/lib/llvm/${LLVM_MAJOR}/bin/clang"
-DCOMPILER_RT_TEST_CXX_COMPILER="${BUILD_DIR}/lib/llvm/${LLVM_MAJOR}/bin/clang++"
)
# same flags are passed for build & tests, so we need to strip
# them down to a subset supported by clang
CC=${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/bin/clang \
CXX=${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/bin/clang++ \
strip-unsupported-flags
fi
if use prefix && [[ "${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="${EPREFIX}/MacOSX.sdk"
# Set version based on the SDK in EPREFIX
# This disables i386 for SDK >= 10.15
# Will error if has_use tsan and SDK < 10.12
-DDARWIN_macosx_OVERRIDE_SDK_VERSION="$(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
cmake_src_configure
if use test; then
local sys_dir=( "${EPREFIX}"/usr/lib/clang/${LLVM_VERSION}/lib/* )
[[ -e ${sys_dir} ]] || die "Unable to find ${sys_dir}"
[[ ${#sys_dir[@]} -eq 1 ]] || die "Non-deterministic compiler-rt install: ${sys_dir[*]}"
# copy clang over since resource_dir is located relatively to binary
# therefore, we can put our new libraries in it
mkdir -p "${BUILD_DIR}"/lib/{llvm/${LLVM_MAJOR}/{bin,$(get_libdir)},clang/${LLVM_VERSION}/include} || die
cp "${EPREFIX}"/usr/lib/llvm/${LLVM_MAJOR}/bin/clang{,++} \
"${BUILD_DIR}"/lib/llvm/${LLVM_MAJOR}/bin/ || die
cp "${EPREFIX}"/usr/lib/clang/${LLVM_VERSION}/include/*.h \
"${BUILD_DIR}"/lib/clang/${LLVM_VERSION}/include/ || die
cp "${sys_dir}"/*builtins*.a \
"${BUILD_DIR}/lib/clang/${LLVM_VERSION}/lib/${sys_dir##*/}/" || die
# we also need LLVMgold.so for gold-based tests
if [[ -f ${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/$(get_libdir)/LLVMgold.so ]]; then
ln -s "${EPREFIX}"/usr/lib/llvm/${LLVM_MAJOR}/$(get_libdir)/LLVMgold.so \
"${BUILD_DIR}"/lib/llvm/${LLVM_MAJOR}/$(get_libdir)/ || die
fi
fi
}
src_test() {
# respect TMPDIR!
local -x LIT_PRESERVES_TMP=1
# disable sandbox to have it stop clobbering LD_PRELOAD
local -x SANDBOX_ON=0
# wipe LD_PRELOAD to make ASAN happy
local -x LD_PRELOAD=
cmake_build check-all
}
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