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Unable to cross-compile using CLion - GL/gl.h missing - Yes the packages are installed

  • First off, I do have all the OpenGL dev packages installed and the headers are located at /usr/include. I am trying to cross compile for an iMX8 development board. The board is running Boot2QT fine. I can successfully compile my sample project and install the application using QT Creator. I don't like QT Creator very much, and I am very used to IntelliJ IDEs, so I am attempting to use CLion. I converted the .pro to a CMakeLists.txt, and everything seems ok. My environment is also setup in CLion. The compilation goes along well until it fails to find GL/gl.h. Any suggestions are welcome.


    project( weatherinfo)
    cmake_minimum_required( VERSION 3.1 )
    set( CMAKE_CXX_STANDARD 17 )
    set( CMAKE_BUILD_TYPE Release )
    set( CMAKE_PREFIX_PATH "/home/strongadmin/Qt/5.12.10/gcc_64/")
    add_definitions ( -Wall )
    find_package ( Qt5Core REQUIRED )
    find_package ( Qt5Network REQUIRED )
    find_package ( Qt5Positioning REQUIRED )
    find_package ( Qt5Qml REQUIRED )
    find_package ( Qt5Quick REQUIRED )
    find_package ( Qt5SerialPort REQUIRED )
    set ( weatherinfo_SRCS
    add_executable ( weatherinfo ${weatherinfo_SRCS} )
    target_link_libraries ( weatherinfo Qt5::Core Qt5::Network Qt5::Positioning Qt5::Qml Qt5::Quick Qt5::SerialPort)

    I have tried changing the above CMAKE_PREFIX_PATH to the sysroot for the yocto project but I get various errors. Also I cannot find any GL/gl.h in the yocto SDK sysroot. I assume that is fine since i can successfully compile in QT Creator and install without any problems.

    Here is the error:

    ====================[ Build | weatherinfo | Debug ]=============================
    /opt/b2qt/2.5.3/sysroots/x86_64-pokysdk-linux/usr/bin/cmake --build /home/strongadmin/yocto/qt-projects/weatherinfo/cmake-build-debug --target weatherinfo -- -j 12
    [ 11%] Automatic MOC for target weatherinfo
    [ 11%] Built target weatherinfo_autogen
    [ 22%] Generating qrc_weatherinfo.cpp
    [ 33%] Generating moc_appmodel.cpp
    Scanning dependencies of target weatherinfo
    [ 44%] Building CXX object CMakeFiles/weatherinfo.dir/qrc_weatherinfo.cpp.o
    [ 55%] Building CXX object CMakeFiles/weatherinfo.dir/main.cpp.o
    [ 66%] Building CXX object CMakeFiles/weatherinfo.dir/appmodel.cpp.o
    [ 88%] Building CXX object CMakeFiles/weatherinfo.dir/moc_appmodel.cpp.o
    [ 88%] Building CXX object CMakeFiles/weatherinfo.dir/weatherinfo_autogen/mocs_compilation.cpp.o
    In file included from /home/strongadmin/Qt/5.12.10/gcc_64/include/QtQuick/qsggeometry.h:44:0,
                     from /home/strongadmin/Qt/5.12.10/gcc_64/include/QtQuick/qsgnode.h:43,
                     from /home/strongadmin/Qt/5.12.10/gcc_64/include/QtQuick/qsgrendererinterface.h:43,
                     from /home/strongadmin/Qt/5.12.10/gcc_64/include/QtQuick/qquickwindow.h:44,
                     from /home/strongadmin/Qt/5.12.10/gcc_64/include/QtQuick/qquickview.h:43,
                     from /home/strongadmin/Qt/5.12.10/gcc_64/include/QtQuick/QQuickView:1,
                     from /home/strongadmin/yocto/qt-projects/weatherinfo/main.cpp:52:
    /home/strongadmin/Qt/5.12.10/gcc_64/include/QtGui/qopengl.h:141:13: fatal error: GL/gl.h: No such file or directory
     #   include <GL/gl.h>
    compilation terminated.
    make[3]: *** [CMakeFiles/weatherinfo.dir/build.make:88: CMakeFiles/weatherinfo.dir/main.cpp.o] Error 1
    make[3]: *** Waiting for unfinished jobs....
    make[2]: *** [CMakeFiles/Makefile2:68: CMakeFiles/weatherinfo.dir/all] Error 2
    make[1]: *** [CMakeFiles/Makefile2:80: CMakeFiles/weatherinfo.dir/rule] Error 2
    make: *** [Makefile:118: weatherinfo] Error 2

    Also adding find_package (OpenGL REQUIRED) fails:

    CMake Error at /opt/b2qt/2.5.3/sysroots/x86_64-pokysdk-linux/usr/share/cmake-3.10/Modules/FindPackageHandleStandardArgs.cmake:137 (message):
      Could NOT find OpenGL (missing: OPENGL_opengl_LIBRARY OPENGL_glx_LIBRARY)
    Call Stack (most recent call first):
      /opt/b2qt/2.5.3/sysroots/x86_64-pokysdk-linux/usr/share/cmake-3.10/Modules/FindPackageHandleStandardArgs.cmake:378 (_FPHSA_FAILURE_MESSAGE)
      /opt/b2qt/2.5.3/sysroots/x86_64-pokysdk-linux/usr/share/cmake-3.10/Modules/FindOpenGL.cmake:369 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
      CMakeLists.txt:16 (find_package)

    I also fails the same way when I use the embedded CLion CMake.

  • I have narrowed it down to some environment setup issues, as I can compile fine via command line. I will post once I have it figured out.

  • Ok I have solved the problem. I was already using:

    source /opt/b2qt/2.5.3/environment-setup-aarch64-poky-linux

    to setup the environment before I launched Clion, but apparently there were some sub scripts that run making an alias of cmake with:

    alias cmake="cmake -DCMAKE_TOOLCHAIN_FILE=$OECORE_NATIVE_SYSROOT/usr/share/cmake/OEToolchainConfig.cmake"

    Clion ignores this alias, so I had to add those flags to the cmake options area in Clion under Build, Execution, Deployment -> Cmake -> Cmake options, I also had to fill in the variable $OECORE_NATIVE_SYSROOT, as clion could not resolve that. Here is what I added:


    After that everything was compiling perfectly fine.

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