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# Copyright 1999-2024 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
inherit cmake toolchain-funcs
DESCRIPTION="High-performance neural network inference framework"
HOMEPAGE="https://github.com/Tencent/ncnn/"
SRC_URI="
https://github.com/Tencent/ncnn/archive/refs/tags/${PV}.tar.gz
-> ${P}.tar.gz
"
LICENSE="BSD ZLIB"
SLOT="0/${PV}" # currently has unstable ABI that often requires rebuilds
KEYWORDS="amd64 ~x86"
IUSE="openmp tools +vulkan"
# Need the static library to run tests + skip vulkan / GPU:
# -DNCNN_BUILD_TESTS=ON -DNCNN_SHARED_LIB=OFF -DNCNN_VULKAN=OFF
RESTRICT="test"
RDEPEND="
tools? (
dev-cpp/abseil-cpp:=
dev-libs/protobuf:=
)
vulkan? (
dev-util/glslang:=
media-libs/vulkan-loader
)
"
DEPEND="
${RDEPEND}
vulkan? ( dev-util/vulkan-headers )
"
DOCS=( README.md docs/. )
pkg_pretend() {
[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
}
pkg_setup() {
[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
}
src_configure() {
local mycmakeargs=(
-DGLSLANG_TARGET_DIR="${ESYSROOT}"/usr/$(get_libdir)/cmake
-DNCNN_BUILD_EXAMPLES=no
-DNCNN_BUILD_TOOLS=$(usex tools)
-DNCNN_OPENMP=$(usex openmp)
-DNCNN_PYTHON=no # todo if something needs it
-DNCNN_SHARED_LIB=yes
-DNCNN_SIMPLEVK=no
-DNCNN_SYSTEM_GLSLANG=yes
-DNCNN_VERSION=${PV} # avoids libncnn.so.*.%Y%m%d using build date
-DNCNN_VULKAN=$(usex vulkan)
)
# temporary workaround due to a >=clang-18 regression (bug #929228)
tc-is-clang && [[ $(clang-major-version) -ge 18 ]] &&
mycmakeargs+=( -DNCNN_AVX512BF16=no )
cmake_src_configure
}
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