# Copyright 1999-2026 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

ROCM_VERSION=${PV}

inherit cmake rocm

DESCRIPTION="Generate pseudo-random and quasi-random numbers"
HOMEPAGE="https://github.com/ROCm/rocRAND"
# ROCm 10 ships rocRAND from rocm-libraries release assets, not standalone
# repository tags. verified 2026-08-29
SRC_URI="https://github.com/ROCm/rocm-libraries/releases/download/therock-$(ver_cut 1-2)/rocrand.tar.gz -> rocrand-${PV}.tar.gz"
S="${WORKDIR}/rocrand"

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

RESTRICT="!test? ( test )"

# Require benchmark 1.9.1; older installed versions trigger a sandboxed
# FetchContent fallback. verified 2026-07-27
RDEPEND="
	dev-util/hip:${SLOT}
	benchmark? ( >=dev-cpp/benchmark-1.9.1 )
"
DEPEND="${RDEPEND}
	dev-build/rocm-cmake:${SLOT}
	test? ( dev-cpp/gtest )"
BDEPEND="dev-build/rocm-cmake:${SLOT}"

PATCHES=(
	"${FILESDIR}/${PN}-10.0.0-no-tests-install.patch"
)

src_configure() {
	rocm_use_clang

	export ROCM_PATH="${EPREFIX}/usr"

	local mycmakeargs=(
		-DCMAKE_SKIP_RPATH=ON
		-DAMDGPU_TARGETS="$(get_amdgpu_flags)"
		-DROCM_SYMLINK_LIBS=OFF
		-DBUILD_TEST=$(usex test ON OFF)
		-DBUILD_BENCHMARK=$(usex benchmark ON OFF)
	)

	cmake_src_configure
}

src_test() {
	check_amdgpu
	export LD_LIBRARY_PATH="${BUILD_DIR}/library"
	# Use HMM to fit tests within default sub-512 MiB iGPU VRAM.
	ROCRAND_USE_HMM="1" cmake_src_test -j1
}

src_install() {
	cmake_src_install

	if use benchmark; then
		cd "${BUILD_DIR}"/benchmark || die
		dobin benchmark_rocrand_*
	fi
}