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# Copyright 1999-2018 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=6
PYTHON_COMPAT=( python2_7 python3_5 python3_6 )

EGIT_REPO_URI="https://llvm.org/git/${PN}.git
	https://github.com/llvm-mirror/${PN}.git"
EGIT_COMMIT="dabae5a2afb78cba0320a86e3f5f0b5dc83e077c"

if [[ ${PV} = 9999* ]]; then
	GIT_ECLASS="git-r3"
	EXPERIMENTAL="true"
else
	GIT_ECLASS=""
	S="${WORKDIR}/libclc-${EGIT_COMMIT}"
fi

inherit llvm prefix python-any-r1 toolchain-funcs ${GIT_ECLASS}

DESCRIPTION="OpenCL C library"
HOMEPAGE="http://libclc.llvm.org/"

if [[ ${PV} = 9999* ]]; then
	SRC_URI="${SRC_PATCHES}"
else
	SRC_URI="https://github.com/llvm-mirror/libclc/archive/${EGIT_COMMIT}.tar.gz -> ${P}.tar.gz
		${SRC_PATCHES}"
fi

LICENSE="|| ( MIT BSD )"
SLOT="0"
KEYWORDS="amd64 x86"
IUSE_VIDEO_CARDS="video_cards_nvidia video_cards_r600 video_cards_radeonsi"
IUSE="${IUSE_VIDEO_CARDS}"
REQUIRED_USE="|| ( ${IUSE_VIDEO_CARDS} )"

DEPEND="
	|| (
		sys-devel/clang:7
		sys-devel/clang:6
		sys-devel/clang:5
		sys-devel/clang:4
		>=sys-devel/clang-3.9:0
	)
	${PYTHON_DEPS}"

LLVM_MAX_SLOT=7

llvm_check_deps() {
	has_version "sys-devel/clang:${LLVM_SLOT}"
}

src_prepare() {
	default
	if use prefix; then
		hprefixify configure.py
	fi
}

pkg_setup() {
	# we do not need llvm_pkg_setup
	python-any-r1_pkg_setup
}

src_configure() {
	local libclc_targets=()

	use video_cards_nvidia && libclc_targets+=("nvptx--" "nvptx64--" "nvptx--nvidiacl" "nvptx64--nvidiacl")
	use video_cards_r600 && libclc_targets+=("r600--")
	use video_cards_radeonsi && libclc_targets+=("amdgcn--" "amdgcn-mesa-mesa3d" "amdgcn--amdhsa")

	[[ ${#libclc_targets[@]} ]] || die "libclc target missing!"

	./configure.py \
		--with-cxx-compiler="$(tc-getCXX)" \
		--with-llvm-config="$(get_llvm_prefix "${LLVM_MAX_SLOT}")/bin/llvm-config" \
		--prefix="${EPREFIX}/usr" "${libclc_targets[@]}" || die
}

src_compile() {
	emake VERBOSE=1
}