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Using OpenGL within QT, novice Linux user

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  • S Offline
    S Offline
    SGaist
    Lifetime Qt Champion
    wrote on 16 Nov 2018, 20:56 last edited by
    #2

    Hi,

    Do you really have to use Qt 3.3.8b ?

    Interested in AI ? www.idiap.ch
    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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    • B Offline
      B Offline
      BKBK
      wrote on 16 Nov 2018, 21:35 last edited by
      #3

      Unfortunately yes. I am on a government project and the project manager(s) take the position that since it works and does what is needed we are not going to spend money and time to upgrade.

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      • S Offline
        S Offline
        SGaist
        Lifetime Qt Champion
        wrote on 16 Nov 2018, 21:40 last edited by
        #4

        Ok...

        You need to install the libglu development package if not already on your system.

        Interested in AI ? www.idiap.ch
        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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        • B Offline
          B Offline
          BKBK
          wrote on 16 Nov 2018, 21:54 last edited by
          #5

          In my OP I noted that something like that was found. Here is the result of: ls al libGLU.so:
          lrwxrwxrwx 1 root root 15 Oct 25 10:23 libGLU.so -> libGLU.so.1.3.1

          Is there something else I should look for?

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          • S Offline
            S Offline
            SGaist
            Lifetime Qt Champion
            wrote on 16 Nov 2018, 21:58 last edited by
            #6

            My bad, I misread.

            Did you try with -lGLU ?

            Interested in AI ? www.idiap.ch
            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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            • B Offline
              B Offline
              BKBK
              wrote on 16 Nov 2018, 22:13 last edited by
              #7

              I have tried
              -lglu –lglut // returned cannot fine -lglu
              LGLU –LGLUT // returned undefined reference to 'glClear'
              -Lglu -lGLUT // returned cannot find lGLUT

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              • S Offline
                S Offline
                SGaist
                Lifetime Qt Champion
                wrote on 16 Nov 2018, 22:16 last edited by
                #8

                Keep l lowercase, it's not the same signification for the linker. -L adds a folder to the search path of the linker while -l is to add a library to link to.

                Interested in AI ? www.idiap.ch
                Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                • B Offline
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                  BKBK
                  wrote on 16 Nov 2018, 22:30 last edited by
                  #9

                  Did a few more, and maybe some duplicates from earlier.
                  -lglut undefined reference to glClear
                  -lglut -lglu cannot find -lglu
                  -lglut -lGLU undefined reference to glClear

                  the -lglu and -lGLU appear to provide nothing.

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                  • S Offline
                    S Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on 16 Nov 2018, 22:31 last edited by
                    #10

                    glClear is provided by the OpenGL library. You are missing -lGL.

                    Interested in AI ? www.idiap.ch
                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                    • B Offline
                      B Offline
                      BKBK
                      wrote on 16 Nov 2018, 22:45 last edited by
                      #11

                      Ok, that worked and I am on my way again.
                      Thank you for your time and patience.

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                      11/11

                      16 Nov 2018, 22:45

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