[gentoo-commits] repo/gentoo:master commit in: media-libs/opencv/

["Andrew Ammerlaan" <andrewammerlaan@gentoo.org>]

commit:     fff547871e9a63f12b3e82b284029b7991fe0de3
Author:     Andrew Ammerlaan <andrewammerlaan <AT> gentoo <DOT> org>
AuthorDate: Tue Aug 22 12:51:09 2023 +0000
Commit:     Andrew Ammerlaan <andrewammerlaan <AT> gentoo <DOT> org>
CommitDate: Tue Aug 22 13:11:52 2023 +0000
URL:        https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=fff54787

media-libs/opencv: add 4.8.0

This unfortunatly does not fix the incompatibility
with protobuf-23.

Bug: https://bugs.gentoo.org/912788
Signed-off-by: Andrew Ammerlaan <andrewammerlaan <AT> gentoo.org>

 media-libs/opencv/Manifest            |   2 +
 media-libs/opencv/opencv-4.8.0.ebuild | 584 ++++++++++++++++++++++++++++++++++
 2 files changed, 586 insertions(+)

diff --git a/media-libs/opencv/Manifest b/media-libs/opencv/Manifest
index afd4918173cb..101f4de3c816 100644
--- a/media-libs/opencv/Manifest
+++ b/media-libs/opencv/Manifest
@@ -5,4 +5,6 @@ DIST opencv-4.6.0.tar.gz 90208971 BLAKE2B f01a907eb4a54fc0795293f1a28bbf3af5a3d2
 DIST opencv-4.6.0_contrib.tar.gz 59667769 BLAKE2B 26b454436d943d7955194fd21ad29efc417d5c873fa19a6a200beb319cd75c6ec5766734c478fcd55745a7c200ffdaa92e7b1821f13810bb9d181d263f8fc6da SHA512 2e9cc9632774babf59cd186cd7b7edbd35a816bdda2acb51339c514a33fc6d8c3f1687eb3b0f6827304e3fcb0f9f3e81d47e8ab08239175750ac1240cc99dc5d
 DIST opencv-4.7.0.tar.gz 91027497 BLAKE2B c76ae37a79e48f818b83383f35b4fe518d959e4e34651dc16346438eeba31cbfd5c970c27e30cad359c8ad91435e9bdb61cad147f08e671d4c844cb8c5b525f9 SHA512 f799e1eb4ef1eb81212319cf908d0a64d2d5179c8da86b919b06e96a6870a9f3ed33251223a841b71711349018ea6782c174179fa59958a1573e22d11cc9347d
 DIST opencv-4.7.0_contrib.tar.gz 59421940 BLAKE2B d427743c45d7430f3a6dd5712ad46bb7c2b9e88a48a3e924fb32c6a10cdb1f4205941453cc3e1340f02cd53ba5a13061f0da9a7e413072a6bd4a6529507b0939 SHA512 f0d878180655de4255cb72cf358a5949dfcf53a386e74f9a743902ac1bae12b2e812a1fc4ecc56a6afdc6adbffec867883a3245ce0b527614cc76e3710e23230
+DIST opencv-4.8.0.tar.gz 91992565 BLAKE2B eede5479acdcef7dfb49d260b696ed14e85a27b8cd7211934d3fa9df9a46072daca9e1b7c50d1d56633d5e7bdf96e4a5731c8ea0e04886dc381e7864357ed8de SHA512 48738c3e7460a361274357aef1dd427082ccd59f749d6317d92a414b3741ce6116ea15ed4fedd2d47a25e456c705f3ba114357558646097bfc0e6dba9b3b865c
+DIST opencv-4.8.0_contrib.tar.gz 59201076 BLAKE2B e30c4f17e1e89c8b0821bbf8ea44b6b4ce505ad2761222a8b119c5aee5ae4ef50e06a73f41fee3b2fa60b71c736989904f6d1fb31a16abfe39e605e2d32d851b SHA512 81cc41cfe1ea03e60b0657edeaa76a90926e5e79a9f93a482e17bc9edbf1b5ce36b13d108fd8fb097f2fb3d6381fbeb102811f44bfc761c2de7f69bf3c5298a1
 DIST vgg_boostdesc-3.2.0.tar.gz 1867770 BLAKE2B 1fa5b58e73b6fa56ecf8d19af22298f729942ee1369082e173445d09d3de767bf844bad3d2b462efc1199c392f37c88ba49a9996ba8bfd84b4abeba7de94db63 SHA512 4a046aedd639c8eb4b295b0f499e756deb66210ca083f0124c75531e540663367cb58f6d175f66c4713324177036cd89a8869bdab2de8d1736dafc7f00ef9f44

diff --git a/media-libs/opencv/opencv-4.8.0.ebuild b/media-libs/opencv/opencv-4.8.0.ebuild
new file mode 100644
index 000000000000..772cd8408d98
--- /dev/null
+++ b/media-libs/opencv/opencv-4.8.0.ebuild
@@ -0,0 +1,584 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{9..11} )
+inherit flag-o-matic java-pkg-opt-2 java-ant-2 cmake-multilib python-r1 toolchain-funcs
+
+DESCRIPTION="A collection of algorithms and sample code for various computer vision problems"
+HOMEPAGE="https://opencv.org"
+TINY_DNN_PV="1.0.0a3"
+SRC_URI="https://github.com/${PN}/${PN}/archive/${PV}.tar.gz -> ${P}.tar.gz
+	dnnsamples? ( https://dev.gentoo.org/~amynka/snap/${PN}-3.4.0-res10_300x300-caffeemodel.tar.gz )
+	download? ( https://github.com/rossbridger/opencv-extdep/archive/4.4.0.tar.gz -> ${PN}-4.4.0_extdep.tar.gz )
+	contrib? (
+		https://github.com/${PN}/${PN}_contrib/archive/${PV}.tar.gz -> ${P}_contrib.tar.gz
+		contribdnn? ( https://dev.gentoo.org/~amynka/snap/${PN}-3.4.0-face_landmark_model.tar.gz )
+		contribxfeatures2d? ( https://dev.gentoo.org/~amynka/snap/vgg_boostdesc-3.2.0.tar.gz )
+	)"
+
+LICENSE="Apache-2.0"
+SLOT="0/${PV}" # subslot = libopencv* soname version
+KEYWORDS="~amd64 ~arm ~arm64 ~loong ~ppc ~ppc64 ~riscv ~x86"
+IUSE="contrib contribcvv contribdnn contribfreetype contribhdf contribovis contribsfm contribxfeatures2d cuda debug dnnsamples download +eigen examples +features2d ffmpeg gdal gflags glog gphoto2 gstreamer gtk3 ieee1394 jpeg jpeg2k lapack lto opencl openexr opengl openmp opencvapps png +python qt5 tesseract testprograms threads tiff vaapi v4l vtk webp xine"
+
+# The following lines are shamelessly stolen from ffmpeg-9999.ebuild with modifications
+ARM_CPU_FEATURES=(
+	cpu_flags_arm_neon:NEON
+	cpu_flags_arm_vfpv3:VFPV3
+)
+PPC_CPU_FEATURES=(
+	cpu_flags_ppc_vsx:VSX
+	cpu_flags_ppc_vsx3:VSX3
+)
+X86_CPU_FEATURES_RAW=(
+	avx:AVX
+	avx2:AVX2
+	avx512f:AVX_512F
+	f16c:FP16
+	fma3:FMA3
+	popcnt:POPCNT
+	sse:SSE
+	sse2:SSE2
+	sse3:SSE3
+	ssse3:SSSE3
+	sse4_1:SSE4_1
+	sse4_2:SSE4_2
+)
+X86_CPU_FEATURES=( ${X86_CPU_FEATURES_RAW[@]/#/cpu_flags_x86_} )
+CPU_FEATURES_MAP=(
+	${ARM_CPU_FEATURES[@]}
+	${PPC_CPU_FEATURES[@]}
+	${X86_CPU_FEATURES[@]}
+)
+IUSE="${IUSE} ${CPU_FEATURES_MAP[@]%:*}"
+
+# OpenGL needs gtk or Qt installed to activate, otherwise build system
+# will silently disable it Wwithout the user knowing, which defeats the
+# purpose of the opengl use flag.
+# cuda needs contrib, bug #701712
+REQUIRED_USE="
+	cpu_flags_x86_avx2? ( cpu_flags_x86_f16c )
+	cpu_flags_x86_f16c? ( cpu_flags_x86_avx )
+	cuda? ( contrib
+		tesseract? ( opencl ) )
+	dnnsamples? ( examples )
+	gflags? ( contrib )
+	glog? ( contrib )
+	contribcvv? ( contrib qt5 )
+	contribdnn? ( contrib )
+	contribfreetype? ( contrib )
+	contribhdf? ( contrib )
+	contribovis? ( contrib )
+	contribsfm? ( contrib eigen gflags glog )
+	contribxfeatures2d? ( contrib download )
+	examples? ( contribdnn )
+	java? ( python )
+	opengl? ( qt5 )
+	python? ( ${PYTHON_REQUIRED_USE} )
+	tesseract? ( contrib )
+	?? ( gtk3 qt5 )"
+
+# The following logic is intrinsic in the build system, but we do not enforce
+# it on the useflags since this just blocks emerging pointlessly:
+#	openmp? ( !threads )
+
+RDEPEND="
+	app-arch/bzip2[${MULTILIB_USEDEP}]
+	<dev-libs/protobuf-23:=[${MULTILIB_USEDEP}]
+	sys-libs/zlib[${MULTILIB_USEDEP}]
+	cuda? ( dev-util/nvidia-cuda-toolkit:0= )
+	contribhdf? ( sci-libs/hdf5:= )
+	contribfreetype? (
+		media-libs/freetype:2[${MULTILIB_USEDEP}]
+		media-libs/harfbuzz:=[${MULTILIB_USEDEP}]
+	)
+	contribovis? ( dev-games/ogre:0/1.12 )
+	ffmpeg? ( media-video/ffmpeg:0=[${MULTILIB_USEDEP}] )
+	gdal? ( sci-libs/gdal:= )
+	gflags? ( dev-cpp/gflags:=[${MULTILIB_USEDEP}] )
+	glog? ( dev-cpp/glog:=[${MULTILIB_USEDEP}] )
+	gphoto2? ( media-libs/libgphoto2:=[${MULTILIB_USEDEP}] )
+	gstreamer? (
+		media-libs/gstreamer:1.0[${MULTILIB_USEDEP}]
+		media-libs/gst-plugins-base:1.0[${MULTILIB_USEDEP}]
+	)
+	gtk3? (
+		dev-libs/glib:2[${MULTILIB_USEDEP}]
+		x11-libs/gtk+:3[${MULTILIB_USEDEP}]
+	)
+	ieee1394? (
+		media-libs/libdc1394:=[${MULTILIB_USEDEP}]
+		sys-libs/libraw1394[${MULTILIB_USEDEP}]
+	)
+	java? ( >=virtual/jre-1.8:* )
+	jpeg? ( media-libs/libjpeg-turbo:=[${MULTILIB_USEDEP}] )
+	jpeg2k? ( media-libs/openjpeg:2=[${MULTILIB_USEDEP}] )
+	lapack? (
+		virtual/cblas
+		>=virtual/lapack-3.10
+	)
+	opencl? ( virtual/opencl[${MULTILIB_USEDEP}] )
+	openexr? (
+		dev-libs/imath:=
+		media-libs/openexr:=
+	)
+	opengl? (
+		virtual/opengl[${MULTILIB_USEDEP}]
+		virtual/glu[${MULTILIB_USEDEP}]
+	)
+	png? ( media-libs/libpng:0=[${MULTILIB_USEDEP}] )
+	python? (
+		${PYTHON_DEPS}
+		dev-python/numpy[${PYTHON_USEDEP}]
+	)
+	qt5? (
+		dev-qt/qtgui:5=
+		dev-qt/qtwidgets:5=
+		dev-qt/qttest:5=
+		dev-qt/qtconcurrent:5=
+		opengl? ( dev-qt/qtopengl:5= )
+	)
+	tesseract? ( app-text/tesseract[opencl=,${MULTILIB_USEDEP}] )
+	threads? ( dev-cpp/tbb:=[${MULTILIB_USEDEP}] )
+	tiff? ( media-libs/tiff:=[${MULTILIB_USEDEP}] )
+	v4l? ( >=media-libs/libv4l-0.8.3[${MULTILIB_USEDEP}] )
+	vaapi? ( media-libs/libva[${MULTILIB_USEDEP}] )
+	vtk? ( sci-libs/vtk[rendering] )
+	webp? ( media-libs/libwebp:=[${MULTILIB_USEDEP}] )
+	xine? ( media-libs/xine-lib )"
+DEPEND="${RDEPEND}
+	eigen? ( >=dev-cpp/eigen-3.3.8-r1:3 )
+	java? ( >=virtual/jdk-1.8:* )"
+BDEPEND="virtual/pkgconfig"
+
+MULTILIB_WRAPPED_HEADERS=(
+	# [opencv4]
+	/usr/include/opencv4/opencv2/cvconfig.h
+	/usr/include/opencv4/opencv2/opencv_modules.hpp
+	# [cudev]
+	/usr/include/opencv4/opencv2/cudaarithm.hpp
+	/usr/include/opencv4/opencv2/cudabgsegm.hpp
+	/usr/include/opencv4/opencv2/cudacodec.hpp
+	/usr/include/opencv4/opencv2/cudafeatures2d.hpp
+	/usr/include/opencv4/opencv2/cudafilters.hpp
+	/usr/include/opencv4/opencv2/cudaimgproc.hpp
+	/usr/include/opencv4/opencv2/cudalegacy.hpp
+	/usr/include/opencv4/opencv2/cudalegacy/NCVBroxOpticalFlow.hpp
+	/usr/include/opencv4/opencv2/cudalegacy/NCVHaarObjectDetection.hpp
+	/usr/include/opencv4/opencv2/cudalegacy/NCV.hpp
+	/usr/include/opencv4/opencv2/cudalegacy/NCVPyramid.hpp
+	/usr/include/opencv4/opencv2/cudalegacy/NPP_staging.hpp
+	/usr/include/opencv4/opencv2/cudaobjdetect.hpp
+	/usr/include/opencv4/opencv2/cudaoptflow.hpp
+	/usr/include/opencv4/opencv2/cudastereo.hpp
+	/usr/include/opencv4/opencv2/cudawarping.hpp
+	/usr/include/opencv4/opencv2/cudev/block/block.hpp
+	/usr/include/opencv4/opencv2/cudev/block/detail/reduce.hpp
+	/usr/include/opencv4/opencv2/cudev/block/detail/reduce_key_val.hpp
+	/usr/include/opencv4/opencv2/cudev/block/dynamic_smem.hpp
+	/usr/include/opencv4/opencv2/cudev/block/reduce.hpp
+	/usr/include/opencv4/opencv2/cudev/block/scan.hpp
+	/usr/include/opencv4/opencv2/cudev/block/vec_distance.hpp
+	/usr/include/opencv4/opencv2/cudev/common.hpp
+	/usr/include/opencv4/opencv2/cudev/expr/binary_func.hpp
+	/usr/include/opencv4/opencv2/cudev/expr/binary_op.hpp
+	/usr/include/opencv4/opencv2/cudev/expr/color.hpp
+	/usr/include/opencv4/opencv2/cudev/expr/deriv.hpp
+	/usr/include/opencv4/opencv2/cudev/expr/expr.hpp
+	/usr/include/opencv4/opencv2/cudev/expr/per_element_func.hpp
+	/usr/include/opencv4/opencv2/cudev/expr/reduction.hpp
+	/usr/include/opencv4/opencv2/cudev/expr/unary_func.hpp
+	/usr/include/opencv4/opencv2/cudev/expr/unary_op.hpp
+	/usr/include/opencv4/opencv2/cudev/expr/warping.hpp
+	/usr/include/opencv4/opencv2/cudev/functional/color_cvt.hpp
+	/usr/include/opencv4/opencv2/cudev/functional/detail/color_cvt.hpp
+	/usr/include/opencv4/opencv2/cudev/functional/functional.hpp
+	/usr/include/opencv4/opencv2/cudev/functional/tuple_adapter.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/copy.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/detail/copy.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/detail/histogram.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/detail/integral.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/detail/minmaxloc.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/detail/pyr_down.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/detail/pyr_up.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/detail/reduce.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/detail/reduce_to_column.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/detail/reduce_to_row.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/detail/split_merge.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/detail/transform.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/detail/transpose.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/histogram.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/integral.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/pyramids.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/reduce.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/reduce_to_vec.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/split_merge.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/transform.hpp
+	/usr/include/opencv4/opencv2/cudev/grid/transpose.hpp
+	/usr/include/opencv4/opencv2/cudev.hpp
+	/usr/include/opencv4/opencv2/cudev/ptr2d/constant.hpp
+	/usr/include/opencv4/opencv2/cudev/ptr2d/deriv.hpp
+	/usr/include/opencv4/opencv2/cudev/ptr2d/detail/gpumat.hpp
+	/usr/include/opencv4/opencv2/cudev/ptr2d/extrapolation.hpp
+	/usr/include/opencv4/opencv2/cudev/ptr2d/glob.hpp
+	/usr/include/opencv4/opencv2/cudev/ptr2d/gpumat.hpp
+	/usr/include/opencv4/opencv2/cudev/ptr2d/interpolation.hpp
+	/usr/include/opencv4/opencv2/cudev/ptr2d/lut.hpp
+	/usr/include/opencv4/opencv2/cudev/ptr2d/mask.hpp
+	/usr/include/opencv4/opencv2/cudev/ptr2d/remap.hpp
+	/usr/include/opencv4/opencv2/cudev/ptr2d/resize.hpp
+	/usr/include/opencv4/opencv2/cudev/ptr2d/texture.hpp
+	/usr/include/opencv4/opencv2/cudev/ptr2d/traits.hpp
+	/usr/include/opencv4/opencv2/cudev/ptr2d/transform.hpp
+	/usr/include/opencv4/opencv2/cudev/ptr2d/warping.hpp
+	/usr/include/opencv4/opencv2/cudev/ptr2d/zip.hpp
+	/usr/include/opencv4/opencv2/cudev/util/atomic.hpp
+	/usr/include/opencv4/opencv2/cudev/util/detail/tuple.hpp
+	/usr/include/opencv4/opencv2/cudev/util/detail/type_traits.hpp
+	/usr/include/opencv4/opencv2/cudev/util/limits.hpp
+	/usr/include/opencv4/opencv2/cudev/util/saturate_cast.hpp
+	/usr/include/opencv4/opencv2/cudev/util/simd_functions.hpp
+	/usr/include/opencv4/opencv2/cudev/util/tuple.hpp
+	/usr/include/opencv4/opencv2/cudev/util/type_traits.hpp
+	/usr/include/opencv4/opencv2/cudev/util/vec_math.hpp
+	/usr/include/opencv4/opencv2/cudev/util/vec_traits.hpp
+	/usr/include/opencv4/opencv2/cudev/warp/detail/reduce.hpp
+	/usr/include/opencv4/opencv2/cudev/warp/detail/reduce_key_val.hpp
+	/usr/include/opencv4/opencv2/cudev/warp/reduce.hpp
+	/usr/include/opencv4/opencv2/cudev/warp/scan.hpp
+	/usr/include/opencv4/opencv2/cudev/warp/shuffle.hpp
+	/usr/include/opencv4/opencv2/cudev/warp/warp.hpp
+	# [contrib_cvv]
+	/usr/include/opencv4/opencv2/cvv/call_meta_data.hpp
+	/usr/include/opencv4/opencv2/cvv/cvv.hpp
+	/usr/include/opencv4/opencv2/cvv/debug_mode.hpp
+	/usr/include/opencv4/opencv2/cvv/dmatch.hpp
+	/usr/include/opencv4/opencv2/cvv/filter.hpp
+	/usr/include/opencv4/opencv2/cvv/final_show.hpp
+	/usr/include/opencv4/opencv2/cvv.hpp
+	/usr/include/opencv4/opencv2/cvv/show_image.hpp
+	# [contrib_hdf]
+	/usr/include/opencv4/opencv2/hdf/hdf5.hpp
+	/usr/include/opencv4/opencv2/hdf.hpp
+	# [contrib_ovis]
+	/usr/include/opencv4/opencv2/ovis.hpp
+	# [contrib_sfm]
+	/usr/include/opencv4/opencv2/sfm.hpp
+	/usr/include/opencv4/opencv2/sfm/conditioning.hpp
+	/usr/include/opencv4/opencv2/sfm/fundamental.hpp
+	/usr/include/opencv4/opencv2/sfm/io.hpp
+	/usr/include/opencv4/opencv2/sfm/numeric.hpp
+	/usr/include/opencv4/opencv2/sfm/projection.hpp
+	/usr/include/opencv4/opencv2/sfm/reconstruct.hpp
+	/usr/include/opencv4/opencv2/sfm/robust.hpp
+	/usr/include/opencv4/opencv2/sfm/simple_pipeline.hpp
+	/usr/include/opencv4/opencv2/sfm/triangulation.hpp
+	# [vtk]
+	/usr/include/opencv4/opencv2/viz.hpp
+	/usr/include/opencv4/opencv2/viz/types.hpp
+	/usr/include/opencv4/opencv2/viz/viz3d.hpp
+	/usr/include/opencv4/opencv2/viz/vizcore.hpp
+	/usr/include/opencv4/opencv2/viz/widget_accessor.hpp
+	/usr/include/opencv4/opencv2/viz/widgets.hpp
+)
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-3.4.0-disable-download.patch
+	"${FILESDIR}"/${PN}-3.4.1-cuda-add-relaxed-constexpr.patch
+	"${FILESDIR}"/${PN}-4.1.2-opencl-license.patch
+	"${FILESDIR}"/${PN}-4.4.0-disable-native-cpuflag-detect.patch
+	"${FILESDIR}"/${PN}-4.5.0-link-with-cblas-for-lapack.patch
+)
+
+pkg_pretend() {
+	[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
+}
+
+pkg_setup() {
+	[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
+	java-pkg-opt-2_pkg_setup
+}
+
+src_prepare() {
+	# https://bugs.gentoo.org/838274
+	replace-flags -O3 -O2
+
+	cmake_src_prepare
+
+	# remove bundled stuff
+	rm -r 3rdparty || die "Removing 3rd party components failed"
+	sed -e '/add_subdirectory(.*3rdparty.*)/ d' \
+		-i CMakeLists.txt cmake/*cmake || die
+
+	if use dnnsamples; then
+		mv  "${WORKDIR}/res10_300x300_ssd_iter_140000.caffemodel" "${WORKDIR}/${P}/samples/dnn/" || die
+	fi
+
+	if use contrib; then
+		cd  "${WORKDIR}/${PN}_contrib-${PV}" || die
+		if use contribxfeatures2d; then
+			mv "${WORKDIR}"/*.i "${WORKDIR}/${PN}_contrib-${PV}"/modules/xfeatures2d/src/ || die
+		fi
+	fi
+
+	if use download; then
+		mv "${WORKDIR}/${PN}-extdep-4.4.0" "${WORKDIR}/${P}/.cache/" || die
+	fi
+
+	java-pkg-opt-2_src_prepare
+
+	# this really belongs in src_prepare() too
+	JAVA_ANT_ENCODING="iso-8859-1"
+	# set encoding so even this cmake build will pick it up.
+	export ANT_OPTS+=" -Dfile.encoding=iso-8859-1"
+	java-ant-2_src_configure
+}
+
+multilib_src_configure() {
+	# please dont sort here, order is the same as in CMakeLists.txt
+	GLOBALCMAKEARGS=(
+		# for protobuf
+		-DCMAKE_CXX_STANDARD=14
+
+	# Optional 3rd party components
+	# ===================================================
+		-DENABLE_DOWNLOAD=$(usex download)
+		-DWITH_QUIRC=OFF # Do not have dependencies
+		-DWITH_FLATBUFFERS=OFF # Requires removed third party component
+		-DWITH_1394=$(usex ieee1394)
+	#	-DWITH_AVFOUNDATION=OFF # IOS
+		-DWITH_VTK=$(multilib_native_usex vtk)
+		-DWITH_EIGEN=$(usex eigen)
+		-DWITH_VFW=OFF # Video windows support
+		-DWITH_FFMPEG=$(usex ffmpeg)
+		-DWITH_GSTREAMER=$(usex gstreamer)
+		-DWITH_GSTREAMER_0_10=OFF	# Don't want this
+		-DWITH_GTK=$(usex gtk3)
+		-DWITH_GTK_2_X=OFF # only want gtk3 nowadays
+		-DWITH_IPP=OFF
+		# Jasper was removed from tree because of security problems.
+		# Upstream were/are making progress. We use openjpeg instead.
+		# bug 734284
+		-DWITH_JASPER=OFF
+		-DWITH_JPEG=$(usex jpeg)
+		-DWITH_OPENJPEG=$(usex jpeg2k)
+		-DWITH_WEBP=$(usex webp)
+		-DWITH_OPENEXR=$(multilib_native_usex openexr)
+		-DWITH_OPENGL=$(usex opengl)
+		-DWITH_OPENVX=OFF
+		-DWITH_OPENNI=OFF	# Not packaged
+		-DWITH_OPENNI2=OFF	# Not packaged
+		-DWITH_PNG=$(usex png)
+		-DWITH_GDCM=OFF
+		-DWITH_PVAPI=OFF
+		-DWITH_GIGEAPI=OFF
+		-DWITH_ARAVIS=OFF
+		-DWITH_QT=$(multilib_native_usex qt5 5 OFF)
+		-DWITH_WIN32UI=OFF		# Windows only
+	#	-DWITH_QUICKTIME=OFF
+	#	-DWITH_QTKIT=OFF
+		-DWITH_TBB=$(usex threads)
+		-DWITH_OPENMP=$(usex openmp)
+		-DWITH_CSTRIPES=OFF
+		-DWITH_PTHREADS_PF=ON
+		-DWITH_TIFF=$(usex tiff)
+		-DWITH_UNICAP=OFF		# Not packaged
+		-DWITH_V4L=$(usex v4l)
+		-DWITH_LIBV4L=$(usex v4l)
+	#	-DWITH_DSHOW=ON			# direct show supp
+		-DWITH_MSMF=OFF
+		-DWITH_XIMEA=OFF	# Windows only
+		-DWITH_XINE=$(multilib_native_usex xine)
+		-DWITH_CLP=OFF
+		-DWITH_OPENCL=$(usex opencl)
+		-DWITH_OPENCL_SVM=OFF
+		-DWITH_OPENCLAMDFFT=$(usex opencl)
+		-DWITH_OPENCLAMDBLAS=$(usex opencl)
+		-DWITH_DIRECTX=OFF
+		-DWITH_INTELPERC=OFF
+		-DWITH_IPP_A=OFF
+		-DWITH_MATLAB=OFF
+		-DWITH_VA=$(usex vaapi)
+		-DWITH_VA_INTEL=$(usex vaapi)
+		-DWITH_GDAL=$(multilib_native_usex gdal)
+		-DWITH_GPHOTO2=$(usex gphoto2)
+		-DWITH_LAPACK=$(multilib_native_usex lapack)
+		-DWITH_ITT=OFF # 3dparty libs itt_notify
+	# ===================================================
+	# CUDA build components: nvidia-cuda-toolkit takes care of GCC version
+	# ===================================================
+		-DWITH_CUDA=$(multilib_native_usex cuda)
+		-DWITH_CUBLAS=$(multilib_native_usex cuda)
+		-DWITH_CUFFT=$(multilib_native_usex cuda)
+		-DWITH_NVCUVID=OFF
+	#	-DWITH_NVCUVID=$(usex cuda)
+		-DCUDA_NPP_LIBRARY_ROOT_DIR=$(usex cuda "${EPREFIX}/opt/cuda" "")
+	# ===================================================
+	# OpenCV build components
+	# ===================================================
+		-DBUILD_SHARED_LIBS=ON
+		-DBUILD_JAVA=$(multilib_native_usex java) # Ant needed, no compile flag
+		-DBUILD_ANDROID_EXAMPLES=OFF
+		-DBUILD_opencv_apps=$(usex opencvapps ON OFF)
+		-DBUILD_DOCS=OFF # Doesn't install anyways.
+		-DBUILD_EXAMPLES=$(multilib_native_usex examples)
+		-DBUILD_PERF_TESTS=OFF
+		-DBUILD_TESTS=$(multilib_native_usex testprograms)
+		-DBUILD_WITH_DEBUG_INFO=$(usex debug)
+	#	-DBUILD_WITH_STATIC_CRT=OFF
+		-DBUILD_WITH_DYNAMIC_IPP=OFF
+		-DBUILD_FAT_JAVA_LIB=OFF
+	#	-DBUILD_ANDROID_SERVICE=OFF
+		-DBUILD_CUDA_STUBS=$(multilib_native_usex cuda)
+		-DOPENCV_EXTRA_MODULES_PATH=$(usex contrib "${WORKDIR}/opencv_contrib-${PV}/modules" "")
+	# ===================================================
+	# OpenCV installation options
+	# ===================================================
+		-DINSTALL_CREATE_DISTRIB=OFF
+		-DINSTALL_C_EXAMPLES=$(multilib_native_usex examples)
+		-DINSTALL_TESTS=$(multilib_native_usex testprograms)
+		-DINSTALL_PYTHON_EXAMPLES=$(multilib_native_usex examples)
+	#	-DINSTALL_ANDROID_EXAMPLES=OFF
+		-DINSTALL_TO_MANGLED_PATHS=OFF
+		-DOPENCV_GENERATE_PKGCONFIG=ON
+		# opencv uses both ${CMAKE_INSTALL_LIBDIR} and ${LIB_SUFFIX}
+		# to set its destination libdir
+		-DLIB_SUFFIX=
+	# ===================================================
+	# OpenCV build options
+	# ===================================================
+		-DENABLE_CCACHE=OFF
+		# bug 733796, but PCH is a risky game in CMake anyway
+		-DENABLE_PRECOMPILED_HEADERS=OFF
+		-DENABLE_SOLUTION_FOLDERS=OFF
+		-DENABLE_PROFILING=OFF
+		-DENABLE_COVERAGE=OFF
+
+		-DHAVE_opencv_java=$(multilib_native_usex java YES NO)
+		-DENABLE_NOISY_WARNINGS=OFF
+		-DOPENCV_WARNINGS_ARE_ERRORS=OFF
+		-DENABLE_IMPL_COLLECTION=OFF
+		-DENABLE_INSTRUMENTATION=OFF
+		-DGENERATE_ABI_DESCRIPTOR=OFF
+		-DDOWNLOAD_EXTERNAL_TEST_DATA=OFF
+		-DENABLE_LTO=$(usex lto)
+	# ===================================================
+	# things we want to be hard off or not yet figured out
+	# ===================================================
+		-DBUILD_PACKAGE=OFF
+	# ===================================================
+	# Not building protobuf but update files bug #631418
+	# ===================================================
+		-DBUILD_PROTOBUF=OFF
+		-DPROTOBUF_UPDATE_FILES=ON
+	# ===================================================
+	# things we want to be hard enabled not worth useflag
+	# ===================================================
+		-DCMAKE_SKIP_RPATH=ON
+		-DOPENCV_DOC_INSTALL_PATH=
+		-DBUILD_opencv_features2d=$(usex features2d ON OFF)
+	)
+
+	# ==================================================
+	# cpu flags, should solve 633900
+	#===================================================
+	local CPU_BASELINE=""
+	for i in "${CPU_FEATURES_MAP[@]}" ; do
+		if [[ ${ABI} != x86 || ${i%:*} != "cpu_flags_x86_avx2" ]]; then # workaround for Bug 747163
+			use ${i%:*} && CPU_BASELINE="${CPU_BASELINE}${i#*:};"
+		fi
+	done
+
+	GLOBALCMAKEARGS+=(
+		-DOPENCV_CPU_OPT_IMPLIES_IGNORE=ON
+		-DCPU_BASELINE=${CPU_BASELINE}
+		-DCPU_DISPATCH=
+	)
+
+	# ===================================================
+	# OpenCV Contrib Modules
+	# ===================================================
+	if use contrib; then
+		GLOBALCMAKEARGS+=(
+			-DBUILD_opencv_dnn=$(usex contribdnn ON OFF)
+			-DTINYDNN_ROOT="${WORKDIR}/tiny-dnn-${TINY_DNN_PV}"
+			-DBUILD_opencv_dnns_easily_fooled=OFF
+			-DBUILD_opencv_xfeatures2d=$(usex contribxfeatures2d ON OFF)
+			-DBUILD_opencv_cvv=$(usex contribcvv ON OFF)
+			-DBUILD_opencv_hdf=$(multilib_native_usex contribhdf ON OFF)
+			-DBUILD_opencv_sfm=$(usex contribsfm ON OFF)
+			-DBUILD_opencv_freetype=$(usex contribfreetype ON OFF)
+			-DBUILD_opencv_ovis=$(usex contribovis ON OFF)
+		)
+
+		if multilib_is_native_abi; then
+			GLOBALCMAKEARGS+=(
+				-DCMAKE_DISABLE_FIND_PACKAGE_Tesseract=$(usex !tesseract)
+			)
+		else
+			GLOBALCMAKEARGS+=(
+				-DCMAKE_DISABLE_FIND_PACKAGE_Tesseract=ON
+			)
+		fi
+	fi
+
+	# workaround for bug 413429
+	tc-export CC CXX
+
+	local mycmakeargs=(
+		${GLOBALCMAKEARGS[@]}
+		-DPYTHON_EXECUTABLE=OFF
+		-DINSTALL_PYTHON_EXAMPLES=OFF
+		-DBUILD_opencv_python2=OFF
+		-DBUILD_opencv_python3=OFF
+	)
+
+	cmake_src_configure
+
+	# Copy face_land_model to ${CMAKE_BINARY_DIR}/${OPENCV_TEST_DATA_INSTALL_PATH}
+	# TODO patch ocv_download to copy files into destination dirs
+	if use contribdnn; then
+		mkdir -p "${BUILD_DIR}"/share/OpenCV/testdata/cv/face/ || die
+		cp "${WORKDIR}"/face_landmark_model.dat "${BUILD_DIR}"/share/OpenCV/testdata/cv/face/ || die
+	fi
+
+}
+
+python_module_compile() {
+	local BUILD_DIR="${orig_BUILD_DIR}"
+	local mycmakeargs=( ${GLOBALCMAKEARGS[@]} )
+
+	# Set all python variables to load the correct Gentoo paths
+	mycmakeargs+=(
+		# python_setup alters PATH and sets this as wrapper
+		# to the correct interpreter we are building for
+		-DPYTHON_DEFAULT_EXECUTABLE=${EPYTHON}
+		-DINSTALL_PYTHON_EXAMPLES=$(usex examples)
+	)
+
+	# Regenerate cache file. Can't use rebuild_cache as it won't
+	# have the Gentoo specific options.
+	rm CMakeCache.txt || die "rm failed"
+	cmake_src_configure
+	cmake_src_compile
+	cmake_src_install
+
+	# Remove compiled binary so new version compiles
+	# Avoid conflicts with new module builds as build system doesn't
+	# really support it.
+	rm -r modules/python3 || die "rm failed"
+
+	python_optimize "${ED}"/$(python_get_sitedir)
+}
+
+multilib_src_install() {
+	cmake_src_install
+
+	# Build and install the python modules for all targets
+	if multilib_is_native_abi && use python; then
+		local orig_BUILD_DIR="${BUILD_DIR}"
+		python_foreach_impl python_module_compile
+	fi
+}