emerge -pqv =media-libs/opencv-4.1.1::media-kit
[ebuild  N    ] media-libs/opencv-4.1.1  USE="eigen gstreamer gtk ieee1394 jpeg jpeg2k opengl openmp png python tiff v4l webp -abi_riscv_lp64 -abi_riscv_lp64d -contrib -contrib_cvv -contrib_dnn -contrib_hdf -contrib_sfm -contrib_xfeatures2d -cuda -debug -dnn_samples -examples -ffmpeg -gdal -gflags -glog -gphoto2 -java -lapack (-libav) -opencl -openexr -pch -qt5 -tesseract -testprograms -threads -vaapi -vtk -xine" CPU_FLAGS_X86="avx avx2 sse sse2 sse3 sse4_1 sse4_2 ssse3 -fma3 -popcnt" PYTHON_TARGETS="python2_7 python3_7 -python3_5 -python3_6"