Revert "sys-libs/libomp: Remove LLVM 14"

This reverts commit 87b2f454cbb8d115d977280753f31a2f04c6c0a9.

Signed-off-by: Gerion Entrup <gerion.entrup@flump.de>

2 files changed, 146 insertions, 0 deletions

diff --git a/sys-libs/libomp/libomp-14.0.6-r1.ebuild b/sys-libs/libomp/libomp-14.0.6-r1.ebuild
new file mode 100644
index 0000000..9e03f27
--- /dev/null
+++ b/sys-libs/libomp/libomp-14.0.6-r1.ebuild
@@ -0,0 +1,145 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{9..10} )
+inherit flag-o-matic cmake-multilib linux-info llvm llvm.org python-any-r1
+
+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"
+KEYWORDS="amd64 arm arm64 ~ppc ppc64 ~riscv x86 ~amd64-linux ~x64-macos"
+IUSE="
+	cuda debug hwloc offload ompt test
+	llvm_targets_AMDGPU llvm_targets_NVPTX
+"
+RESTRICT="!test? ( test )"
+# CUDA works only with the x86_64 ABI
+REQUIRED_USE="
+	cuda? ( llvm_targets_NVPTX )
+	offload? ( cuda? ( abi_x86_64 ) )
+"
+
+RDEPEND="
+	hwloc? ( >=sys-apps/hwloc-2.5:0=[${MULTILIB_USEDEP}] )
+	offload? (
+		virtual/libelf:=[${MULTILIB_USEDEP}]
+		dev-libs/libffi:=[${MULTILIB_USEDEP}]
+		~sys-devel/llvm-${PV}[${MULTILIB_USEDEP}]
+		cuda? ( dev-util/nvidia-cuda-toolkit:= )
+	)
+"
+# 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? (
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
+		sys-devel/clang
+	)
+"
+
+LLVM_COMPONENTS=( openmp llvm/include )
+LLVM_PATCHSET=${PV}-r2
+llvm.org_set_globals
+
+python_check_deps() {
+	python_has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+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() {
+	use offload && LLVM_MAX_SLOT=${PV%%.*} llvm_pkg_setup
+	use test && python-any-r1_pkg_setup
+}
+
+multilib_src_configure() {
+	# LTO causes issues in other packages building, #870127
+	filter-lto
+
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+
+	local libdir="$(get_libdir)"
+	local mycmakeargs=(
+		-DOPENMP_LIBDIR_SUFFIX="${libdir#lib}"
+
+		-DLIBOMP_USE_HWLOC=$(usex hwloc)
+		-DLIBOMP_OMPT_SUPPORT=$(usex ompt)
+
+		-DOPENMP_ENABLE_LIBOMPTARGET=$(usex offload)
+
+		# do not install libgomp.so & libiomp5.so aliases
+		-DLIBOMP_INSTALL_ALIASES=OFF
+		# disable unnecessary hack copying stuff back to srcdir
+		-DLIBOMP_COPY_EXPORTS=OFF
+	)
+
+	if use offload; then
+		if has "${CHOST%%-*}" aarch64 powerpc64le x86_64; then
+			mycmakeargs+=(
+				-DCMAKE_DISABLE_FIND_PACKAGE_CUDA=$(usex !cuda)
+				-DLIBOMPTARGET_BUILD_AMDGCN_BCLIB=$(usex llvm_targets_AMDGPU)
+				-DLIBOMPTARGET_BUILD_NVPTX_BCLIB=$(usex llvm_targets_NVPTX)
+				# a cheap hack to force clang
+				-DLIBOMPTARGET_NVPTX_CUDA_COMPILER="$(type -P "${CHOST}-clang")"
+				# upstream defaults to looking for it in clang dir
+				# this fails when ccache is being used
+				-DLIBOMPTARGET_NVPTX_BC_LINKER="$(type -P llvm-link)"
+			)
+		else
+			mycmakeargs+=(
+				-DCMAKE_DISABLE_FIND_PACKAGE_CUDA=ON
+				-DLIBOMPTARGET_BUILD_AMDGCN_BCLIB=OFF
+				-DLIBOMPTARGET_BUILD_NVPTX_BCLIB=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
+}
diff --git a/sys-libs/libomp/metadata.xml b/sys-libs/libomp/metadata.xml
index ba8a523..ec501a8 100644
--- a/sys-libs/libomp/metadata.xml
+++ b/sys-libs/libomp/metadata.xml
@@ -9,6 +9,7 @@
 		<email>llvm@gentoo.org</email>
 	</maintainer>
 	<use>
+		<flag name="cuda">Build CUDA offloading plugin (only with USE=offload)</flag>
 		<flag name="gdb-plugin">Build OMPD GDB plugin</flag>
 		<flag name="hwloc">Enable CPU affinity support via hwloc</flag>
 		<flag name="offload">Support offloading OpenMP using libomptarget</flag>