gentoo resync : 25.11.2020

6 files changed, 1183 insertions, 1 deletions

diff --git a/media-libs/opencv/Manifest b/media-libs/opencv/Manifest
index 37cb176cb012..4349225e55d2 100644
--- a/media-libs/opencv/Manifest
+++ b/media-libs/opencv/Manifest
@@ -3,10 +3,19 @@ AUX opencv-3.4.0-disable-download.patch 1050 BLAKE2B 6f39f61588d9231cc8d87762453
 AUX opencv-3.4.1-cuda-add-relaxed-constexpr.patch 707 BLAKE2B 743a9c259c59fc4e3017539faef0723e0a80fb9c4bbde94811f32b3e6ae271b3db39fd35487d75078cfbe9e596604c4e37fb5c6c18619ed524c52683219dd8af SHA512 b37ce78495a3bbc439f203d9db81d9bff3e7f980c01ef5187dee537dd9c1025c5163ec3760b48d91a099a2fafb60526c9fe83f7183fc605fb3cc0f5c7a65f6bf
 AUX opencv-4.1.2-opencl-license.patch 519 BLAKE2B 6dcdf809c3c75a39d0e44f02e157a0c0ee074fd15144565ed51ade7e7849cb313c084100f499cc1240424f4647a2ff73c8d5e61cbdf6d0499846db61b8a30729 SHA512 2874a5140ef5028eb6c64f36325904000edd722560cf876fc49d63b040633bcfea01cae27c156b18191564805cafd2986f26eea322b1376af4f2982d66ed7653
 AUX opencv-4.1.2-pkg-config-file.patch 345 BLAKE2B ba3968a5dbdcc981cc513055ca99b8726ba2fe993cb8c128d574688a748dbd6fc287089bc0c04af89f6b9b62b37cae9663a81c329b6a2dab4919470450b9f6c7 SHA512 0fa66ca24c0fa72dc9e13c0c40592cf5ca5aa5856d1747613f9c4528f0b00f05dd224662c022563db994f7e43879b97d1ba1f0afa2703c30e4a3efc520dc332d
+AUX opencv-4.4.0-disable-native-cpuflag-detect.patch 1218 BLAKE2B 06569f6b7d33eccb11cae74624a2cc7d7e1eb788145813509220dc8436d2380892392be8c4af03fec845f3eade74b6277985cf80e38785317b15f17890bcaa4c SHA512 3be60f7ee28e3b001ef0c791e3ce1c849ff6fa9fdb70731716668b2698eed9abb24ee3aead1dbc857ed68fc46a645c70a1e3831e8a3e5a5b1791aa06bd2f9ee1
+AUX opencv-4.5.0-link-with-cblas-for-lapack.patch 726 BLAKE2B adbffd961c88229bf810e13fe20705352ff506a653c1d55bb0687c03d8daf9e05aed0f2ba9cd6e306c625837d6ddf64eeb99dc6cbf2b15fae833f4a7eea6aad0 SHA512 4c3108e304721c2cd78eb82f5d7bccc18831db5f47bc628a98ae6a37da389deef30e7e9b6dc5644e3bc0e0fafdd907dc37822a58a25555999698527d2ac364b0
 DIST opencv-3.4.0-face_landmark_model.tar.gz 63299830 BLAKE2B 58f08cd8c030ee1c8b66e76a561fd625e112face427d001185f8d7c0eaace55adbd8474663021841a1382bfe393a210e64c51223441713cdb9156fac866a845c SHA512 2cd29ce42c08b2966db3ef4a2bc217ab3d07051819757ec6de8f3deea29e28f60abab39f101dba03f766f17018598e411bd687a7eaab0c681c113e10a2de2b23
 DIST opencv-3.4.0-res10_300x300-caffeemodel.tar.gz 10036604 BLAKE2B 2a2de48fc420f13e7be146ac88f311901c5b4e409c30e466152e33cae1f8afd87dcb6d758af447c268d90bd67989c8798cd80cab172b10499a6ad5224509dbdf SHA512 96fee9f447d5739bc01a5cab37c453cf7237457dfb5d2bf93ac37f8e5aa557ac222316f449cd58e37e856abe4d8e9d4a7820daaba32f0b22cbcde8e340287d4b
 DIST opencv-4.1.2.tar.gz 87468598 BLAKE2B 9e0fbd8499f783cd1a2b5ffddf557aef424b0a446f71f826522ffd4526d04742e0c408b99810fe6b39753d40c475922d2e273732fdc0a0b4ee0bc56052a7a26c SHA512 d18d2cc35dc1c95c8870d35feb14459db27ebf6d09ff89a185918b1faff1b36dedacc18f268a6483570c404aca19b83ba627ce7af2265af7195a029cb766c09f
 DIST opencv-4.1.2_contrib.tar.gz 60881937 BLAKE2B c461aaa62306b226bde9211e2d611dcf705510e32c8598458737eb09c510cfdb49c33e11f1a7c591090d8243590e915b779fdb55955550fe44dab7545e4cc308 SHA512 1e14f94f9228c5d6a598493eed265aab1d8a740d5bfa00639afb05287732220eb71f88bb374de47dcd440f4376486f9db0e8b338e90e5dc4f6af8d355340b622
+DIST opencv-4.4.0.tar.gz 88887103 BLAKE2B 87838e2c837074c445eeead11b76b0ab6f433873195169fe288dfb5e4844f27b13126ef9c0d973857693c77db82168826df698ee7f34bc10eec3bda869b30d32 SHA512 ce4bada7b57c1a00439eca02abcba262732d5eabfd26090f6f83642d747a9a1a7908230bcd01a2b999c509e0c43c8b0dcb2b93ac824518b79cffe533f22652bb
+DIST opencv-4.4.0_contrib.tar.gz 59968818 BLAKE2B 2e2c1bf776fef0b4d9f92406665adfbce96e6185a4b5fda82cfdd1e7899b3ca7e7615c4dce508082fcf94a10cfa160154ac0aa7a90ce2635f566a65176678dcd SHA512 d1a29a4a343f55fe2ae04966d2fc2d20765de719619bea68b84ee72f432777062727d8105b0aa168f359e468544b2ea930b1a4f8dc059e51de27d8af229c6b6b
+DIST opencv-4.4.0_extdep.tar.gz 65334871 BLAKE2B 89fa0083da428e986bb4287295bdbff626d0f84866377413649c1d7ca77338288141f22d2a3c0b64d6d0fc1db98f918c8b33a665274cee4c4aefb44359e4333d SHA512 7b758099ce4abef151051e3e9e1e45b73e4054669d3aa53051e4d4c5f43d9373c9bda5ecbce51f6b024562cb566bd1117505af29ab5f3c36a493f185111a3b4e
+DIST opencv-4.5.0.tar.gz 90116240 BLAKE2B bcd6ccc4ff0cb1b66923c17c9d9e4ced711527b5d92abd2a5330f791fb07ff93dafa7a3f3095e6d96cb6cea877ac170bb2533f563fa843f284501019263daff3 SHA512 c34100f3f3fe45f2115975350d23288a3badb32864ba0cbd32512387416d1cf10d16d3ef5f3d089d6a1c2be587d788d33997513fc015dbf7d774a622f2d3811f
+DIST opencv-4.5.0_contrib.tar.gz 60115063 BLAKE2B 4068905c9f5f308f30f15ad383ae459cbb421d1871344c3548a6c11647ac9da7af8c46798e860bdd1fcbacccda0fb03f6c1cf07b458ddfa5a0c311511627af52 SHA512 b2ae72e920c78472fd677281b8dd6f25872399d8ade97b0d3b0fc50bbabea8c00ea849d87bfb311ac148cef663481d0c89c0f6875578c052c1cc7ddcd70e6e17
 DIST vgg_boostdesc-3.2.0.tar.gz 1867770 BLAKE2B 1fa5b58e73b6fa56ecf8d19af22298f729942ee1369082e173445d09d3de767bf844bad3d2b462efc1199c392f37c88ba49a9996ba8bfd84b4abeba7de94db63 SHA512 4a046aedd639c8eb4b295b0f499e756deb66210ca083f0124c75531e540663367cb58f6d175f66c4713324177036cd89a8869bdab2de8d1736dafc7f00ef9f44
 EBUILD opencv-4.1.2-r3.ebuild 18316 BLAKE2B 8775108cacc4c8f89fec915f73a4ba2c3908cf69c3e9c6d59c14dde2239c597845c04b5875591bef753ef6076e0009eb0630b95b0024660ac8d5ea773749eef2 SHA512 ed1cc7ba12fff122c700c5d88a2055677db459d0547a1eb465313a0b1db4efa75663618607facc1d33c97c9dd02a517d09bd627140082374851c97a9bec1a38c
-MISC metadata.xml 2786 BLAKE2B 1a29ddd9b75277f52d0a66cfb60fe2ad240ffdbdbf58a74038c684658405e90e858470b84fc0ff0935c972020152cfe6b6570a53ac68b71c299036e06516f469 SHA512 aa72fe71384691be664703e35c2f1342f9c90881d761b04e16357869c515fba551940b5bb624f9a7085f1ffa2e26067ac28b42fd97375d8a81a1901158b86ffc
+EBUILD opencv-4.4.0-r1.ebuild 20301 BLAKE2B 822f7c3d46de91b998481fbf26731ea1ca5d134c73ff22dd0cf0f8a325a9e58208ad99ce545f56ab97de1e2c17fd15d61dffbe72093be93eb2150be6beaec161 SHA512 ed3ab5ad91c438a383b5037ec35c1713244dca7bd20fb0c770ca27d4cd8afe3516be6b76f5be3f383765a9064ef974b4a85dfe77538127375966ee873ab1536a
+EBUILD opencv-4.5.0.ebuild 20529 BLAKE2B 67363a3f10feeeacf0b24156257acb65004939c15b700381df5729f275450c3d440cda7779f9db1a5cab676308b2e26177391c08f74a71ef655fba5dbbf14cf0 SHA512 04cc308127b2c80996e651028ed8ddb015a44c3b05dfc3515b146292542e604e5267b2a6bb30e4a8f4d66ff59725baf80b9dde1142114d6a499a2937fea27c82
+MISC metadata.xml 3132 BLAKE2B 7a499ebf8678ccae68c4947075f925b439ecdcca8a56c77c8a57895d57ffda6ecaade65e1124d12a78bbdf15eef8f9c4524c921bc53009aeb7defd5c489396a6 SHA512 ff59cff9b8f41e69f421bee8d2680eb655c3336f2eafa8c3567ec0d0509707bf9cd0ba41190a8012564d43d87ac5b35e5dc2c827167ed6d315e422a53a13900a
diff --git a/media-libs/opencv/files/opencv-4.4.0-disable-native-cpuflag-detect.patch b/media-libs/opencv/files/opencv-4.4.0-disable-native-cpuflag-detect.patch
new file mode 100644
index 000000000000..89ac1ff47ca1
--- /dev/null
+++ b/media-libs/opencv/files/opencv-4.4.0-disable-native-cpuflag-detect.patch
@@ -0,0 +1,26 @@
+ cmake/OpenCVCompilerOptimizations.cmake | 12 ++++++------
+ 1 file changed, 6 insertions(+), 6 deletions(-)
+
+diff --git a/cmake/OpenCVCompilerOptimizations.cmake b/cmake/OpenCVCompilerOptimizations.cmake
+index 970dd28903..b56892bb12 100644
+--- a/cmake/OpenCVCompilerOptimizations.cmake
++++ b/cmake/OpenCVCompilerOptimizations.cmake
+@@ -156,12 +156,12 @@ if(";${CPU_BASELINE};" MATCHES ";NATIVE;" OR ";${CPU_BASELINE};" MATCHES ";HOST;
+   set(_add_native_flag ON)
+ elseif(";${CPU_BASELINE};" MATCHES ";DETECT;")
+   set(CPU_BASELINE_DETECT ON)
+-elseif(" ${CMAKE_CXX_FLAGS} " MATCHES " -march=native | -xHost | /QxHost ")
+-  if(DEFINED CPU_BASELINE)
+-    message(STATUS "CPU: Detected '-march=native' or '-xHost' compiler flag. Force CPU_BASELINE=DETECT.")
+-  endif()
+-  set(CPU_BASELINE "DETECT" CACHE STRING "${HELP_CPU_BASELINE}")
+-  set(CPU_BASELINE_DETECT ON)
++#elseif(" ${CMAKE_CXX_FLAGS} " MATCHES " -march=native | -xHost | /QxHost ")
++#  if(DEFINED CPU_BASELINE)
++#    message(STATUS "CPU: Detected '-march=native' or '-xHost' compiler flag. Force CPU_BASELINE=DETECT.")
++#  endif()
++#  set(CPU_BASELINE "DETECT" CACHE STRING "${HELP_CPU_BASELINE}")
++#  set(CPU_BASELINE_DETECT ON)
+ endif()
+ 
+ if(X86 OR X86_64)
diff --git a/media-libs/opencv/files/opencv-4.5.0-link-with-cblas-for-lapack.patch b/media-libs/opencv/files/opencv-4.5.0-link-with-cblas-for-lapack.patch
new file mode 100644
index 000000000000..acee677052d6
--- /dev/null
+++ b/media-libs/opencv/files/opencv-4.5.0-link-with-cblas-for-lapack.patch
@@ -0,0 +1,18 @@
+diff --git a/cmake/OpenCVFindLAPACK.cmake b/cmake/OpenCVFindLAPACK.cmake
+index 342bebc..9ebd206 100644
+--- a/cmake/OpenCVFindLAPACK.cmake
++++ b/cmake/OpenCVFindLAPACK.cmake
+@@ -136,10 +136,12 @@ if(WITH_LAPACK)
+         ocv_lapack_check()
+       endif()
+       if(NOT HAVE_LAPACK)
+-        if(LAPACKE_INCLUDE_DIR)
++        find_package(CBLAS)
++        if(LAPACKE_INCLUDE_DIR AND CBLAS_FOUND)
+           set(LAPACK_INCLUDE_DIR  ${LAPACKE_INCLUDE_DIR})
+           set(LAPACK_CBLAS_H      "cblas.h")
+           set(LAPACK_LAPACKE_H    "lapacke.h")
++          set(LAPACK_LIBRARIES    ${LAPACK_LIBRARIES} ${CBLAS_LIBRARIES})
+           set(LAPACK_IMPL         "LAPACK/Generic")
+           ocv_lapack_check()
+         elseif(APPLE)
diff --git a/media-libs/opencv/metadata.xml b/media-libs/opencv/metadata.xml
index 98984a7467b5..ad1fde1b865e 100644
--- a/media-libs/opencv/metadata.xml
+++ b/media-libs/opencv/metadata.xml
@@ -18,6 +18,7 @@ Face Recognition; Gesture Recognition; Motion Tracking, Ego Motion, Motion Under
 		<flag name="features2d">Enable features2d module</flag>
 		<flag name="gdal">Enable support for sci-libs/gdal library</flag>
 		<flag name="gtk3">Enable x11-libs/gtk+:3 support</flag>
+		<flag restrict="&gt;=media-libs/opencv-4.4.0" name="lto">Build using Link Time Optimizations (LTO)</flag>
 		<flag restrict="&gt;=media-libs/opencv-4.1.2" name="opencvapps">Enable compilation with opencvapps</flag>
 		<flag restrict="&gt;=media-libs/opencv-3.1.0" name="gflags">Use Google's C++ argument parsing library</flag>
 		<flag restrict="&gt;=media-libs/opencv-3.1.0" name="glog">Use Google's C++ loggin library</flag>
@@ -26,6 +27,8 @@ Face Recognition; Gesture Recognition; Motion Tracking, Ego Motion, Motion Under
 		<flag restrict="&gt;=media-libs/opencv-3.3.0" name="contribdnn">DNN module contrib requires tiny dnn</flag>
 		<flag restrict="&gt;=media-libs/opencv-3.1.0" name="contribhdf">HDF module requires <pkg>sci-libs/hdf5</pkg></flag>
 		<flag restrict="&gt;=media-libs/opencv-3.1.0" name="contribsfm">SFM module requires eigen, gflags, and glog</flag>
+		<flag restrict="&gt;=media-libs/opencv-4.4.0" name="contribfreetype">Enable Drawing UTF-8 strings with freetype/harfbuzz</flag>
+		<flag restrict="&gt;=media-libs/opencv-4.4.0" name="contribovis">Enable Ogre vision module support</flag>
 		<flag restrict="&gt;=media-libs/opencv-3.4.0" name="dnnsamples">Download dnn caffeemodel samples</flag>
 		<flag name="opencl">Add support for OpenCL</flag>
 		<flag restrict="&gt;=media-libs/opencv-3.1.0" name="tesseract">Use Google's OCR Engine</flag>
diff --git a/media-libs/opencv/opencv-4.4.0-r1.ebuild b/media-libs/opencv/opencv-4.4.0-r1.ebuild
new file mode 100644
index 000000000000..df2a210f927d
--- /dev/null
+++ b/media-libs/opencv/opencv-4.4.0-r1.ebuild
@@ -0,0 +1,559 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{6,7,8,9} )
+CMAKE_ECLASS=cmake
+inherit 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/${PV}.tar.gz -> ${P}_extdep.tar.gz )
+	contrib? (
+		https://github.com/${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="BSD"
+SLOT="0/${PV}" # subslot = libopencv* soname version
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc ~ppc64 ~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.
+REQUIRED_USE="
+	cuda? ( 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 )
+	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:=[${MULTILIB_USEDEP}]
+	sys-libs/zlib[${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-1.6:* )
+	jpeg? ( virtual/jpeg:0[${MULTILIB_USEDEP}] )
+	jpeg2k? ( media-libs/openjpeg:2=[${MULTILIB_USEDEP}] )
+	lapack? ( virtual/lapack )
+	opencl? ( virtual/opencl[${MULTILIB_USEDEP}] )
+	openexr? ( media-libs/openexr[${MULTILIB_USEDEP}] )
+	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:0[${MULTILIB_USEDEP}] )
+	v4l? ( >=media-libs/libv4l-0.8.3[${MULTILIB_USEDEP}] )
+	vaapi? ( x11-libs/libva[${MULTILIB_USEDEP}] )
+	vtk? ( sci-libs/vtk[rendering] )
+	webp? ( media-libs/libwebp:=[${MULTILIB_USEDEP}] )
+	xine? ( media-libs/xine-lib )"
+# bug #747949 for eigen (eigen-3.3.8 was broken upstream)
+DEPEND="${RDEPEND}
+	eigen? (
+		|| (
+			>=dev-cpp/eigen-3.3.8-r1:3
+			<dev-cpp/eigen-3.3.8:3
+		)
+	)
+	java? ( >=virtual/jdk-1.6 )"
+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
+	# [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
+)
+
+pkg_pretend() {
+	[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
+}
+
+pkg_setup() {
+	[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
+	java-pkg-opt-2_pkg_setup
+}
+
+src_prepare() {
+	cmake_src_prepare
+
+	# remove bundled stuff
+	rm -rf 3rdparty || die "Removing 3rd party components failed"
+	sed -e '/add_subdirectory(.*3rdparty.*)/ d' \
+		-i CMakeLists.txt cmake/*cmake || die
+
+	if use dnnsamples; then
+		mv  "${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}/${PN}-extdep-${PV}" "${WORKDIR}/${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=(
+	# Optional 3rd party components
+	# ===================================================
+		-DENABLE_DOWNLOAD=$(usex download)
+		-DWITH_QUIRC=OFF # Do not have dependencies
+		-DWITH_1394=$(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=$(usex openexr)
+		-DWITH_OPENGL=$(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
+		use ${i%:*} && CPU_BASELINE="${CPU_BASELINE}${i#*:};"
+	done
+
+	GLOBALCMAKEARGS+=(
+		-DOPENCV_CPU_OPT_IMPLIES_IGNORE=ON
+		-DCPU_BASELINE=${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=$(usex examples)
+	)
+
+	# Regenerate cache file. Can't use rebuild_cache as it won't
+	# have the Gentoo specific options.
+	rm -rf CMakeCache.txt || die "rm failed"
+	cmake_src_configure
+	cmake_src_compile
+	cmake_src_install
+
+	# Remove compiled binary so new version compiles
+	# Avoid conflicts with new module builds as build system doesn't
+	# really support it.
+	rm -rf modules/python2 || die "rm failed"
+
+	python_optimize "${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
+}
diff --git a/media-libs/opencv/opencv-4.5.0.ebuild b/media-libs/opencv/opencv-4.5.0.ebuild
new file mode 100644
index 000000000000..c9bf0e907840
--- /dev/null
+++ b/media-libs/opencv/opencv-4.5.0.ebuild
@@ -0,0 +1,567 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{6,7,8,9} )
+CMAKE_ECLASS=cmake
+inherit 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 ~ppc ~ppc64 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.
+REQUIRED_USE="
+	cuda? ( 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:=[${MULTILIB_USEDEP}]
+	sys-libs/zlib[${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-1.6:* )
+	jpeg? ( virtual/jpeg:0[${MULTILIB_USEDEP}] )
+	jpeg2k? ( media-libs/openjpeg:2=[${MULTILIB_USEDEP}] )
+	lapack? (
+		virtual/cblas
+		virtual/lapack
+		virtual/lapacke
+	)
+	opencl? ( virtual/opencl[${MULTILIB_USEDEP}] )
+	openexr? ( media-libs/openexr[${MULTILIB_USEDEP}] )
+	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:0[${MULTILIB_USEDEP}] )
+	v4l? ( >=media-libs/libv4l-0.8.3[${MULTILIB_USEDEP}] )
+	vaapi? ( x11-libs/libva[${MULTILIB_USEDEP}] )
+	vtk? ( sci-libs/vtk[rendering] )
+	webp? ( media-libs/libwebp:=[${MULTILIB_USEDEP}] )
+	xine? ( media-libs/xine-lib )"
+# bug #747949 for eigen (eigen-3.3.8 was broken upstream)
+DEPEND="${RDEPEND}
+	eigen? (
+		|| (
+			>=dev-cpp/eigen-3.3.8-r1:3
+			<dev-cpp/eigen-3.3.8:3
+		)
+	)
+	java? ( >=virtual/jdk-1.6 )"
+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
+	# [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() {
+	[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
+	java-pkg-opt-2_pkg_setup
+}
+
+src_prepare() {
+	cmake_src_prepare
+
+	# remove bundled stuff
+	rm -r 3rdparty || die "Removing 3rd party components failed"
+	sed -e '/add_subdirectory(.*3rdparty.*)/ d' \
+		-i CMakeLists.txt cmake/*cmake || die
+
+	if use dnnsamples; then
+		mv  "${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}/${P}/.cache/" || die
+	fi
+
+	java-pkg-opt-2_src_prepare
+
+	# this really belongs in src_prepare() too
+	JAVA_ANT_ENCODING="iso-8859-1"
+	# set encoding so even this cmake build will pick it up.
+	export ANT_OPTS+=" -Dfile.encoding=iso-8859-1"
+	java-ant-2_src_configure
+}
+
+multilib_src_configure() {
+	# please dont sort here, order is the same as in CMakeLists.txt
+	GLOBALCMAKEARGS=(
+	# Optional 3rd party components
+	# ===================================================
+		-DENABLE_DOWNLOAD=$(usex download)
+		-DWITH_QUIRC=OFF # Do not have dependencies
+		-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=$(usex webp)
+		-DWITH_OPENEXR=$(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
+}