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# Copyright 1999-2019 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

PYTHON_COMPAT=( python{2_7,3_5,3_6} )
CMAKE_BUILD_TYPE="Release"

inherit python-any-r1 cmake-multilib flag-o-matic llvm

DESCRIPTION="OpenCL implementation for Intel Sandy Bridge, Ivy Bridge and Haswell GPUs"
HOMEPAGE="https://01.org/beignet https://gitlab.freedesktop.org/beignet/beignet"
SRC_URI="https://01.org/sites/default/files/${P}-source.tar.gz"

LICENSE="LGPL-2.1+"
SLOT="0"
KEYWORDS="amd64"
IUSE="ocl-icd ocl20"

BDEPEND="${PYTHON_DEPS}
	virtual/pkgconfig"
COMMON="app-eselect/eselect-opencl
	media-libs/mesa[X(+),${MULTILIB_USEDEP}]
	<sys-devel/clang-8.0.0:=[static-analyzer,${MULTILIB_USEDEP}]
	>=x11-libs/libdrm-2.4.70[video_cards_intel,${MULTILIB_USEDEP}]
	x11-libs/libXext[${MULTILIB_USEDEP}]
	x11-libs/libXfixes[${MULTILIB_USEDEP}]
	ocl-icd? ( dev-libs/ocl-icd )"
RDEPEND="${COMMON}"
DEPEND="${COMMON}"

LLVM_MAX_SLOT=7

PATCHES=(
	"${FILESDIR}"/no-debian-multiarch.patch
	"${FILESDIR}"/${PN}-1.3.2_disable-doNegAddOptimization.patch
	"${FILESDIR}"/${PN}-1.3.2_cmake-llvm-config-multilib.patch
	"${FILESDIR}"/${PN}-1.3.2_llvm6.patch
	"${FILESDIR}"/${PN}-1.3.2_llvm7.patch
	"${FILESDIR}"/${PN}-1.3.1-oclicd_no_upstream_icdfile.patch
	"${FILESDIR}"/${PN}-1.2.0_no-hardcoded-cflags.patch
	"${FILESDIR}"/llvm-terminfo.patch
)

DOCS=(
	docs/.
)

S="${WORKDIR}"/Beignet-${PV}-Source

pkg_setup() {
	llvm_pkg_setup
	python_setup
}

src_prepare() {
	# See Bug #593968
	append-flags -fPIC

	cmake-utils_src_prepare
	# We cannot run tests because they require permissions to access
	# the hardware, and building them is very time-consuming.
	cmake_comment_add_subdirectory utests
}

multilib_src_configure() {
	VENDOR_DIR="/usr/$(get_libdir)/OpenCL/vendors/${PN}"

	local mycmakeargs=(
		-DCMAKE_INSTALL_PREFIX="${EPREFIX}${VENDOR_DIR}"
		-DOCLICD_COMPAT=$(usex ocl-icd)
		$(usex ocl20 "" "-DENABLE_OPENCL_20=OFF")
	)

	cmake-utils_src_configure
}

multilib_src_install() {
	VENDOR_DIR="/usr/$(get_libdir)/OpenCL/vendors/${PN}"

	cmake-utils_src_install

	insinto /etc/OpenCL/vendors/
	echo "${EPREFIX}${VENDOR_DIR}/lib/${PN}/libcl.so" > "${PN}-${ABI}.icd" || die "Failed to generate ICD file"
	doins "${PN}-${ABI}.icd"

	dosym "lib/${PN}/libcl.so" "${VENDOR_DIR}"/libOpenCL.so.1
	dosym "lib/${PN}/libcl.so" "${VENDOR_DIR}"/libOpenCL.so
	dosym "lib/${PN}/libcl.so" "${VENDOR_DIR}"/libcl.so.1
	dosym "lib/${PN}/libcl.so" "${VENDOR_DIR}"/libcl.so
}

pkg_postinst() {
	elog ""
	elog "Please note that for Broadwell and newer architectures, Beignet has been deprecated upstream in favour of dev-libs/intel-neo."
	elog "It remains the recommended solution for Sandy Bridge, Ivy Bridge and Haswell."
	elog ""

	if use ocl-icd; then
		"${ROOT}"/usr/bin/eselect opencl set --use-old ocl-icd
	else
		"${ROOT}"/usr/bin/eselect opencl set --use-old beignet
	fi
}