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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 flag-o-matic cmake-multilib linux-info llvm.org llvm-utils
inherit python-single-r1 toolchain-funcs
DESCRIPTION="OpenMP runtime library for LLVM/clang compiler"
HOMEPAGE="https://openmp.llvm.org"
LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
SLOT="0/${LLVM_SOABI}"
IUSE="
+debug gdb-plugin hwloc offload ompt test
llvm_targets_AMDGPU llvm_targets_NVPTX
"
REQUIRED_USE="
gdb-plugin? ( ${PYTHON_REQUIRED_USE} )
"
RESTRICT="!test? ( test )"
RDEPEND="
gdb-plugin? ( ${PYTHON_DEPS} )
hwloc? ( >=sys-apps/hwloc-2.5:0=[${MULTILIB_USEDEP}] )
offload? (
dev-libs/libffi:=[${MULTILIB_USEDEP}]
~sys-devel/llvm-${PV}[${MULTILIB_USEDEP}]
llvm_targets_AMDGPU? ( dev-libs/rocr-runtime:= )
)
"
# tests:
# - dev-python/lit provides the test runner
# - sys-devel/llvm provide test utils (e.g. FileCheck)
# - sys-devel/clang provides the compiler to run tests
DEPEND="
${RDEPEND}
"
BDEPEND="
dev-lang/perl
offload? (
llvm_targets_AMDGPU? ( sys-devel/clang )
llvm_targets_NVPTX? ( sys-devel/clang )
virtual/pkgconfig
)
test? (
${PYTHON_DEPS}
$(python_gen_cond_dep '
dev-python/lit[${PYTHON_USEDEP}]
')
sys-devel/clang
)
"
LLVM_COMPONENTS=( openmp cmake llvm/include )
llvm.org_set_globals
kernel_pds_check() {
if use kernel_linux && kernel_is -lt 4 15 && kernel_is -ge 4 13; then
local CONFIG_CHECK="~!SCHED_PDS"
local ERROR_SCHED_PDS="\
PDS scheduler versions >= 0.98c < 0.98i (e.g. used in kernels >= 4.13-pf11
< 4.14-pf9) do not implement sched_yield() call which may result in horrible
performance problems with libomp. If you are using one of the specified
kernel versions, you may want to disable the PDS scheduler."
check_extra_config
fi
}
pkg_pretend() {
kernel_pds_check
}
pkg_setup() {
if use gdb-plugin || use test; then
python-single-r1_pkg_setup
fi
}
multilib_src_configure() {
use offload && llvm_prepend_path "${LLVM_MAJOR}"
# LTO causes issues in other packages building, #870127
filter-lto
# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
local build_omptarget=OFF
# upstream disallows building libomptarget when sizeof(void*) != 8
if use offload &&
"$(tc-getCC)" ${CFLAGS} ${CPPFLAGS} -c -x c - -o /dev/null \
<<-EOF &>/dev/null
int test[sizeof(void *) == 8 ? 1 : -1];
EOF
then
build_omptarget=ON
fi
local libdir="$(get_libdir)"
local mycmakeargs=(
-DOPENMP_LIBDIR_SUFFIX="${libdir#lib}"
-DLIBOMP_USE_HWLOC=$(usex hwloc)
-DLIBOMP_OMPD_GDB_SUPPORT=$(multilib_native_usex gdb-plugin)
-DLIBOMP_OMPT_SUPPORT=$(usex ompt)
-DOPENMP_ENABLE_LIBOMPTARGET=${build_omptarget}
# do not install libgomp.so & libiomp5.so aliases
-DLIBOMP_INSTALL_ALIASES=OFF
# disable unnecessary hack copying stuff back to srcdir
-DLIBOMP_COPY_EXPORTS=OFF
# prevent trying to access the GPU
-DLIBOMPTARGET_AMDGPU_ARCH=LIBOMPTARGET_AMDGPU_ARCH-NOTFOUND
)
if [[ ${build_omptarget} == ON ]]; then
local ffi_cflags=$($(tc-getPKG_CONFIG) --cflags-only-I libffi)
local ffi_ldflags=$($(tc-getPKG_CONFIG) --libs-only-L libffi)
mycmakeargs+=(
-DFFI_INCLUDE_DIR="${ffi_cflags#-I}"
-DFFI_LIBRARY_DIR="${ffi_ldflags#-L}"
)
if has "${CHOST%%-*}" aarch64 powerpc64le x86_64; then
mycmakeargs+=(
-DLIBOMPTARGET_BUILD_AMDGPU_PLUGIN=$(usex llvm_targets_AMDGPU)
-DLIBOMPTARGET_BUILD_CUDA_PLUGIN=$(usex llvm_targets_NVPTX)
)
else
mycmakeargs+=(
-DLIBOMPTARGET_BUILD_AMDGPU_PLUGIN=OFF
-DLIBOMPTARGET_BUILD_CUDA_PLUGIN=OFF
)
fi
fi
use test && mycmakeargs+=(
# this project does not use standard LLVM cmake macros
-DOPENMP_LLVM_LIT_EXECUTABLE="${EPREFIX}/usr/bin/lit"
-DOPENMP_LIT_ARGS="$(get_lit_flags)"
-DOPENMP_TEST_C_COMPILER="$(type -P "${CHOST}-clang")"
-DOPENMP_TEST_CXX_COMPILER="$(type -P "${CHOST}-clang++")"
)
addpredict /dev/nvidiactl
cmake_src_configure
}
multilib_src_test() {
# respect TMPDIR!
local -x LIT_PRESERVES_TMP=1
cmake_build check-libomp
}
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