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    CMake errors on open example

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    • S
      shlee853
      last edited by

      I'm trying to build april-tag-detect examples for opencv on VOXL.

      Actually this examples is based on opencv 3.4, but, I updated version to 4.2.

      https://gitlab.com/voxl-public/core-libs/voxl-opencv

      It fails on build because of missing f package.

      yocto:~/opencv/examples/april-tag-detect$ cmake CMakeLists.txt 
      -- The C compiler identification is GNU 4.9.3
      -- The CXX compiler identification is GNU 4.9.3
      -- 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
      -- 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
      CMake Error at CMakeLists.txt:4 (find_package):
        By not providing "FindOpenCV.cmake" in CMAKE_MODULE_PATH this project has
        asked CMake to find a package configuration file provided by "OpenCV", but
        CMake did not find one.
      
        Could not find a package configuration file provided by "OpenCV" with any
        of the following names:
      
          OpenCVConfig.cmake
          opencv-config.cmake
      
        Add the installation prefix of "OpenCV" to CMAKE_PREFIX_PATH or set
        "OpenCV_DIR" to a directory containing one of the above files.  If "OpenCV"
        provides a separate development package or SDK, be sure it has been
        installed.
      
      
      -- Configuring incomplete, errors occurred!
      See also "/home/root/opencv/examples/april-tag-detect/CMakeFiles/CMakeOutput.log".
      yocto:~/opencv/examples/april-tag-detect$ 
      

      Could you please let me know advice to find opencv package on VOXL?

      thanks,

      1 Reply Last reply Reply Quote 0
      • Chad SweetC
        Chad Sweet ModalAI Team
        last edited by

        4.5 is hosted here
        http://voxl-packages.modalai.com/stable/

        S 1 Reply Last reply Reply Quote 0
        • S
          shlee853 @Chad Sweet
          last edited by shlee853

          @Chad-Sweet I'm not compiling opencv libraries.

          as you know above scripts, I has some errors on building examples for opencv.

          I think it can't find FindOpenCV.cmake file during compiling.

          Thanks,

          1 Reply Last reply Reply Quote 0
          • Chad SweetC
            Chad Sweet ModalAI Team
            last edited by

            This cmake file has a good example of finding OpenCV libs using cmake

            https://gitlab.com/voxl-public/core-libs/libmodal_exposure/-/blob/master/library/CMakeLists.txt

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