# Copyright 1999-2024 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

ROCM_VERSION=${PV}

inherit cmake rocm

DESCRIPTION="HIP back-end for the parallel algorithm library Thrust"
HOMEPAGE="https://github.com/ROCm/rocThrust"
SRC_URI="https://github.com/ROCm/rocThrust/archive/rocm-${PV}.tar.gz -> rocThrust-${PV}.tar.gz"
S="${WORKDIR}/rocThrust-rocm-${PV}"

LICENSE="Apache-2.0"
SLOT="0/$(ver_cut 1-2)"
KEYWORDS="~amd64"
IUSE="benchmark test"
REQUIRED_USE="
	benchmark? ( ${ROCM_REQUIRED_USE} )
	test? ( ${ROCM_REQUIRED_USE} )
"

RESTRICT="!test? ( test )"

RDEPEND="dev-util/hip
	sci-libs/rocPRIM:${SLOT}[${ROCM_USEDEP}]
	test? ( dev-cpp/gtest )"
DEPEND="${RDEPEND}"
BDEPEND=">=dev-build/cmake-3.22"

PATCHES=( "${FILESDIR}/${PN}-4.0-operator_new.patch" )

src_configure() {
	local mycmakeargs=(
		-DCMAKE_SKIP_RPATH=ON
		-DAMDGPU_TARGETS="$(get_amdgpu_flags)"
		-DBUILD_TEST=$(usex test ON OFF)
		-DBUILD_BENCHMARKS=$(usex benchmark ON OFF)
		-DBUILD_FILE_REORG_BACKWARD_COMPATIBILITY=OFF
	)

	CXX=hipcc cmake_src_configure
}

src_test() {
	check_amdgpu
	# uses HMM to fit tests to default <512M iGPU VRAM
	ROCTHRUST_USE_HMM="1" cmake_src_test -j1
}

src_install() {
	cmake_src_install

	use benchmark && dobin "${BUILD_DIR}"/benchmarks/benchmark_thrust_bench
}