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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..13} )
inherit cmake flag-o-matic llvm.org python-any-r1 toolchain-funcs
DESCRIPTION="OpenMP offloading support"
HOMEPAGE="https://openmp.llvm.org"
LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
SLOT="0/${LLVM_SOABI}"
IUSE="+debug ompt test llvm_targets_AMDGPU llvm_targets_NVPTX"
RESTRICT="!test? ( test )"
RDEPEND="
dev-libs/libffi:=
~llvm-core/llvm-${PV}
~llvm-runtimes/openmp-${PV}[ompt?]
llvm_targets_AMDGPU? ( dev-libs/rocr-runtime:= )
"
DEPEND="
${RDEPEND}
"
# tests:
# - dev-python/lit provides the test runner
# - llvm-core/llvm provide test utils (e.g. FileCheck)
# - llvm-core/clang provides the compiler to run tests
BDEPEND="
dev-lang/perl
virtual/pkgconfig
llvm_targets_AMDGPU? ( llvm-core/clang )
llvm_targets_NVPTX? ( llvm-core/clang )
test? (
$(python_gen_any_dep '
dev-python/lit[${PYTHON_USEDEP}]
')
llvm-core/clang
)
"
# TODO: can it be fixed to compile with gcc?
BDEPEND+="
llvm-core/clang
"
LLVM_COMPONENTS=( offload cmake runtimes/cmake libc/shared )
LLVM_TEST_COMPONENTS=( openmp/cmake )
llvm.org_set_globals
pkg_pretend() {
if [[ ${LLVM_ALLOW_GPU_TESTING} ]]; then
ewarn "LLVM_ALLOW_GPU_TESTING set. This package will run tests against your"
ewarn "GPU if it is supported. Note that these tests may be flaky, fail or"
ewarn "hang, or even cause your GPU to crash (requiring a reboot)."
fi
}
python_check_deps() {
python_has_version "dev-python/lit[${PYTHON_USEDEP}]"
}
pkg_setup() {
if use test; then
python-any-r1_pkg_setup
fi
}
src_configure() {
# TODO
local -x CC=${CHOST}-clang
local -x CXX=${CHOST}-clang++
strip-unsupported-flags
# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
local libdir="$(get_libdir)"
local ffi_cflags=$($(tc-getPKG_CONFIG) --cflags-only-I libffi)
local ffi_ldflags=$($(tc-getPKG_CONFIG) --libs-only-L libffi)
local plugins="host"
local gpus=
local build_devicertl=FALSE
if has "${CHOST%%-*}" aarch64 powerpc64le x86_64; then
if use llvm_targets_AMDGPU; then
plugins+=";amdgpu"
build_devicertl=TRUE
gpus+="amdgpu"
fi
if use llvm_targets_NVPTX; then
plugins+=";cuda"
build_devicertl=TRUE
gpus+="nvptx"
fi
[[ ${gpus} == amdgpunvptx ]] && gpus=all
fi
local mycmakeargs=(
-DLLVM_ROOT="${ESYSROOT}/usr/lib/llvm/${LLVM_MAJOR}"
-DOFFLOAD_LIBDIR_SUFFIX="${libdir#lib}"
-DLIBOMPTARGET_PLUGINS_TO_BUILD="${plugins}"
-DLIBOMPTARGET_OMPT_SUPPORT="$(usex ompt)"
-DLIBOMPTARGET_BUILD_DEVICERTL_BCLIB="${build_devicertl}"
# this breaks building static target libs
-DBUILD_SHARED_LIBS=OFF
-DFFI_INCLUDE_DIR="${ffi_cflags#-I}"
-DFFI_LIBRARY_DIR="${ffi_ldflags#-L}"
)
[[ ! ${LLVM_ALLOW_GPU_TESTING} ]] && mycmakeargs+=(
# prevent trying to access the GPU
-DLIBOMPTARGET_AMDGPU_ARCH=LIBOMPTARGET_AMDGPU_ARCH-NOTFOUND
-DLIBOMPTARGET_NVPTX_ARCH=LIBOMPTARGET_NVPTX_ARCH-NOTFOUND
)
[[ -n ${gpus} ]] && mycmakeargs+=(
-DLIBOMPTARGET_DEVICE_ARCHITECTURES="${gpus}"
)
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++")"
)
cmake_src_configure
if [[ -z ${gpus} ]]; then
# clang requires libomptarget.devicertl.a, but it can be empty
> "${BUILD_DIR}"/libomptarget.devicertl.a || die
fi
}
src_test() {
# respect TMPDIR!
local -x LIT_PRESERVES_TMP=1
cmake_build check-offload
}
src_install() {
cmake_src_install
if [[ ! -f ${ED}/usr/$(get_libdir)/libomptarget.devicertl.a ]]
then
dolib.a "${BUILD_DIR}"/libomptarget.devicertl.a
fi
}
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