Compile OpenCV 4.8 with OpenGL+OpenCL support

compile_cv.sh

git clone https://github.com/opencv/opencv
cd opencv
git checkout 4.8.0
git clone https://github.com/opencv/opencv_contrib
cd opencv_contrib
git checkout 4.8.0
cd ..
mkdir build
cd build

cmake .. -D CMAKE_BUILD_TYPE=DEBUG \
 -D WITH_LIBV4L=ON \
 -D WITH_OPENCL=ON \
 -D BUILD_opencv_python3=ON \
 -D BUILD_opencv_python2=OFF \
 -D BUILD_opencv_java=OFF \
 -D BUILD_opencv_stitching=OFF \
 -D WITH_GSTREAMER=OFF \
 -D OpenGL_GL_PREFERENCE=LEGACY \
 -D WITH_GTK=ON \
 -D WITH_GTK_2_X=ON \
 -D WITH_OPENGL=ON \
 -D BUILD_TESTS=OFF \
 -D BUILD_PERF_TESTS=OFF \
 -D BUILD_EXAMPLES=OFF \
 -D OPENCV_EXTRA_MODULES_PATH=../opencv_contrib/modules

 make