I have tried installing opencv on raspberry pi but i get this error on cmake
cmake -D CMAKE_BUILD_TYPE=RELEASE \
-D CMAKE_INSTALL_PREFIX=/usr/local \ -D INSTALL_PYTHON_EXAMPLES=ON \ -D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib-4.1.2/modules \ -D BUILD_EXAMPLES=ON .. -- The CXX compiler identification is GNU 6.3.0 -- The C compiler identification is GNU 6.3.0 -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- Check for working C compiler: /usr/bin/cc -- Check for working C compiler: /usr/bin/cc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Detected processor: armv7l -- sizeof(void) = 4 on 64 bit processor. Assume 32-bit compilation mode -- Performing Test HAVE_CXX_ATOMICS_WITHOUT_LIB (check file: cmake/checks/atomic_check.cpp) -- Performing Test HAVE_CXX_ATOMICS_WITHOUT_LIB - Success -- Found PythonInterp: /usr/bin/python2.7 (found suitable version "2.7.13", minimum required is "2.7") -- Found PythonLibs: /usr/lib/arm-linux-gnueabihf/libpython2.7.so (found suitable exact version "2.7.13") -- Found PythonInterp: /usr/bin/python3 (found suitable version "3.5.3", minimum required is "3.2") -- Found PythonLibs: /usr/lib/arm-linux-gnueabihf/libpython3.5m.so (found suitable exact version "3.5.3") -- Looking for ccache - not found -- Performing Test HAVE_CXX_FSIGNED_CHAR -- Performing Test HAVE_CXX_FSIGNED_CHAR - Success -- Performing Test HAVE_C_FSIGNED_CHAR -- Performing Test HAVE_C_FSIGNED_CHAR - Success -- Performing Test HAVE_CXX_W -- Performing Test HAVE_CXX_W - Success -- Performing Test HAVE_C_W -- Performing Test HAVE_C_W - Success -- Performing Test HAVE_CXX_WALL -- Performing Test HAVE_CXX_WALL - Success -- Performing Test HAVE_C_WALL -- Performing Test HAVE_C_WALL - Success -- Performing Test HAVE_CXX_WERROR_RETURN_TYPE -- Performing Test HAVE_CXX_WERROR_RETURN_TYPE - Success -- Performing Test HAVE_C_WERROR_RETURN_TYPE -- Performing Test HAVE_C_WERROR_RETURN_TYPE - Success -- Performing Test HAVE_CXX_WERROR_NON_VIRTUAL_DTOR -- Performing Test HAVE_CXX_WERROR_NON_VIRTUAL_DTOR - Success -- Performing Test HAVE_C_WERROR_NON_VIRTUAL_DTOR -- Performing Test HAVE_C_WERROR_NON_VIRTUAL_DTOR - Success -- Performing Test HAVE_CXX_WERROR_ADDRESS -- Performing Test HAVE_CXX_WERROR_ADDRESS - Success -- Performing Test HAVE_C_WERROR_ADDRESS -- Performing Test HAVE_C_WERROR_ADDRESS - Success -- Performing Test HAVE_CXX_WERROR_SEQUENCE_POINT -- Performing Test HAVE_CXX_WERROR_SEQUENCE_POINT - Success -- Performing Test HAVE_C_WERROR_SEQUENCE_POINT -- Performing Test HAVE_C_WERROR_SEQUENCE_POINT - Success -- Performing Test HAVE_CXX_WFORMAT -- Performing Test HAVE_CXX_WFORMAT - Success -- Performing Test HAVE_C_WFORMAT -- Performing Test HAVE_C_WFORMAT - Success -- Performing Test HAVE_CXX_WERROR_FORMAT_SECURITY -- Performing Test HAVE_CXX_WERROR_FORMAT_SECURITY - Success -- Performing Test HAVE_C_WERROR_FORMAT_SECURITY -- Performing Test HAVE_C_WERROR_FORMAT_SECURITY - Success -- Performing Test HAVE_CXX_WMISSING_DECLARATIONS -- Performing Test HAVE_CXX_WMISSING_DECLARATIONS - Success -- Performing Test HAVE_C_WMISSING_DECLARATIONS -- Performing Test HAVE_C_WMISSING_DECLARATIONS - Success -- Performing Test HAVE_CXX_WMISSING_PROTOTYPES -- Performing Test HAVE_CXX_WMISSING_PROTOTYPES - Failed -- Performing Test HAVE_C_WMISSING_PROTOTYPES -- Performing Test HAVE_C_WMISSING_PROTOTYPES - Success -- Performing Test HAVE_CXX_WSTRICT_PROTOTYPES -- Performing Test HAVE_CXX_WSTRICT_PROTOTYPES - Failed -- Performing Test HAVE_C_WSTRICT_PROTOTYPES -- Performing Test HAVE_C_WSTRICT_PROTOTYPES - Success -- Performing Test HAVE_CXX_WUNDEF -- Performing Test HAVE_CXX_WUNDEF - Success -- Performing Test HAVE_C_WUNDEF -- Performing Test HAVE_C_WUNDEF - Success -- Performing Test HAVE_CXX_WINIT_SELF -- Performing Test HAVE_CXX_WINIT_SELF - Success -- Performing Test HAVE_C_WINIT_SELF -- Performing Test HAVE_C_WINIT_SELF - Success -- Performing Test HAVE_CXX_WPOINTER_ARITH -- Performing Test HAVE_CXX_WPOINTER_ARITH - Success -- Performing Test HAVE_C_WPOINTER_ARITH -- Performing Test HAVE_C_WPOINTER_ARITH - Success -- Performing Test HAVE_CXX_WSHADOW -- Performing Test HAVE_CXX_WSHADOW - Success -- Performing Test HAVE_C_WSHADOW -- Performing Test HAVE_C_WSHADOW - Success -- Performing Test HAVE_CXX_WSIGN_PROMO -- Performing Test HAVE_CXX_WSIGN_PROMO - Success -- Performing Test HAVE_C_WSIGN_PROMO -- Performing Test HAVE_C_WSIGN_PROMO - Failed -- Performing Test HAVE_CXX_WUNINITIALIZED -- Performing Test HAVE_CXX_WUNINITIALIZED - Success -- Performing Test HAVE_C_WUNINITIALIZED -- Performing Test HAVE_C_WUNINITIALIZED - Success -- Performing Test HAVE_CXX_WNO_PSABI -- Performing Test HAVE_CXX_WNO_PSABI - Success -- Performing Test HAVE_C_WNO_PSABI -- Performing Test HAVE_C_WNO_PSABI - Success -- Performing Test HAVE_CXX_WSUGGEST_OVERRIDE -- Performing Test HAVE_CXX_WSUGGEST_OVERRIDE - Success -- Performing Test HAVE_C_WSUGGEST_OVERRIDE -- Performing Test HAVE_C_WSUGGEST_OVERRIDE - Failed -- Performing Test HAVE_CXX_WNO_DELETE_NON_VIRTUAL_DTOR -- Performing Test HAVE_CXX_WNO_DELETE_NON_VIRTUAL_DTOR - Success -- Performing Test HAVE_C_WNO_DELETE_NON_VIRTUAL_DTOR -- Performing Test HAVE_C_WNO_DELETE_NON_VIRTUAL_DTOR ...
problem is here:
can you check, if the path is correct ?