1 files changed, 115 insertions, 0 deletions
diff --git a/sys-libs/libomp/libomp-6.0.0_rc2.ebuild b/sys-libs/libomp/libomp-6.0.0_rc2.ebuild
new file mode 100644
index 000000000000..98935fa8fbc4
--- /dev/null
+++ b/sys-libs/libomp/libomp-6.0.0_rc2.ebuild
@@ -0,0 +1,115 @@
+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+: ${CMAKE_MAKEFILE_GENERATOR:=ninja}
+# (needed due to CMAKE_BUILD_TYPE != Gentoo)
+CMAKE_MIN_VERSION=3.7.0-r1
+PYTHON_COMPAT=( python2_7 )
+
+inherit cmake-multilib linux-info python-any-r1
+
+DESCRIPTION="OpenMP runtime library for LLVM/clang compiler"
+HOMEPAGE="https://openmp.llvm.org"
+SRC_URI="http://prereleases.llvm.org/${PV/_//}/openmp-${PV/_/}.src.tar.xz"
+
+# Additional licenses:
+# - MIT-licensed Intel code,
+# - LLVM Software Grant from Intel.
+
+LICENSE="|| ( UoI-NCSA MIT ) MIT LLVM-Grant"
+SLOT="0"
+KEYWORDS=""
+IUSE="cuda hwloc kernel_linux offload ompt test"
+# CUDA works only with the x86_64 ABI
+REQUIRED_USE="offload? ( cuda? ( abi_x86_64 ) )"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	hwloc? ( sys-apps/hwloc:0=[${MULTILIB_USEDEP}] )
+	offload? (
+		virtual/libelf:=[${MULTILIB_USEDEP}]
+		virtual/libffi:=[${MULTILIB_USEDEP}]
+		cuda? ( dev-util/nvidia-cuda-sdk:= )
+	)"
+# 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="${RDEPEND}
+	dev-lang/perl
+	offload? ( virtual/pkgconfig[${MULTILIB_USEDEP}] )
+	test? (
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
+		>=sys-devel/clang-6
+	)"
+
+S=${WORKDIR}/openmp-${PV/_/}.src
+
+# least intrusive of all
+CMAKE_BUILD_TYPE=RelWithDebInfo
+
+python_check_deps() {
+	has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+kernel_pds_check() {
+	if use kernel_linux && kernel_is -lt 4 15 && kernel_is -ge 4 13; then
+		local CONFIG_CHECK="~!SCHED_PDS"
+		local ERROR_SCHED_PDS="\
+PDS scheduler versions >= 0.98c < 0.98i (e.g. used in kernels >= 4.13-pf11
+< 4.14-pf9) do not implement sched_yield() call which may result in horrible
+performance problems with libomp. If you are using one of the specified
+kernel versions, you may want to disable the PDS scheduler."
+
+		check_extra_config
+	fi
+}
+
+pkg_pretend() {
+	kernel_pds_check
+}
+
+pkg_setup() {
+	use test && python-any-r1_pkg_setup
+}
+
+multilib_src_configure() {
+	local libdir="$(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
+	)
+	use offload && mycmakeargs+=(
+		# this is non-fatal and libomp checks for CUDA conditionally
+		# to ABI, so we can just ignore passing the wrong value
+		# on non-amd64 ABIs
+		-DCMAKE_DISABLE_FIND_PACKAGE_CUDA=$(usex !cuda)
+	)
+	use test && mycmakeargs+=(
+		# this project does not use standard LLVM cmake macros
+		-DOPENMP_LLVM_LIT_EXECUTABLE="${EPREFIX}/usr/bin/lit"
+		-DOPENMP_LIT_ARGS="-vv"
+
+		-DOPENMP_TEST_C_COMPILER="$(type -P "${CHOST}-clang")"
+		-DOPENMP_TEST_CXX_COMPILER="$(type -P "${CHOST}-clang++")"
+	)
+	cmake-utils_src_configure
+}
+
+multilib_src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+
+	cmake-utils_src_make check-libomp
+}