orangepi orangepipc2:~$ sudo apt-get install cmake git
Reading packageorangepi orangepipc2:~/opencv-4.5.4/build$ cmake -D CMAKE_BUILD_TYPE=RELEASE \
> -D CMAKE_INSTALL_PREFIX=/usr/local \
> -D INSTALL_C_EXAMPLES=ON \
> -D INSTALL_PYTHON_EXAMPLES=ON \
> -D OPENCV_EXTRA_MODULES_PATH=/home/pi/Opencv/opencv_contrib-4.x/modules \
> -D BUILD_EXAMPLES=ON \
> -D WITH_LIBV4L=ON \
> -D PYTHON3_EXECUTABLE=/usr/bin/python3.7 \
> -D PYTHON_INCLUDE_DIR=/usr/include/python3.7 \
> -D PYTHON_LIBRARY=/usr/lib/arm-linux-gnueabihf/libpython3.7m.so \
> -D PYTHON3_NUMPY_INCLUDE_DIRS=/usr/lib/python3/dist-packages/numpy/core/include \
> ..
-- Hook CMAKE_INIT
-- Hook PRE_CMAKE_BOOTSTRAP
CMake Error: No GHS toolsets found in GHS_TOOLSET_ROOT "/usr/ghs/"
-- Configuring incomplete, errors occurred!
See also "/home/orangepi/opencv-4.5.4/build/CMakeFiles/CMakeOutput.log"
