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  4. [SOLVED] How to install QT under the Raspbian image?
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[SOLVED] How to install QT under the Raspbian image?

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    Pinkypanzer
    wrote on last edited by
    #8

    ldd says : not a dynamic executable

    the readelf commands seem to work even if the folder is /opt/qt50-snapshot/lib. does this matter?

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      Pinkypanzer
      wrote on last edited by
      #9

      do I have to use special settings in the pro file or otherwere in the project?

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        Pinkypanzer
        wrote on last edited by
        #10

        Is it possible that I have to use another qmake to cross-compile for the wheezy than for the original qtonpi image?

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          Pinkypanzer
          wrote on last edited by
          #11

          can be solved by

          export LD_LIBRARY_PATH=/opt/qt50-snaphot/lib

          before running the qt-program.

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            jcverdie
            wrote on last edited by
            #12

            I ran into the same problem, but in my case it comes from a custom QT5 build (not the snapshot).
            Anyway, if followed http://qt-project.org/wiki/RaspberryPi_Beginners_Guide
            and qt ended being installed not in opt but in /usr/local/qt5pi/
            libQtQuick.so.5.0.0 is in the lib subfolder but setting LD_LIBRARY_PATH does not change anything which is quite surprising, and as for Pinkypanzer the ldd tells me hello-qtonpi is not an executable :(

            Any other clue?

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              Pinkypanzer
              wrote on last edited by
              #13

              where did you execute it? via QtCreator or locally on the pi?
              do you have the rights to execute it?

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                jcverdie
                wrote on last edited by
                #14

                Both give the same result: running from QtCreator and running locally give the same error message

                Yes, my binaries are in 644 mode

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                  Pinkypanzer
                  wrote on last edited by
                  #15

                  now I see there's an error in my post. it has to be
                  export LD_LIBRARY_PATH=/opt/qt50-snapshot/lib
                  maybe this is your problem? you have to link the lib-folder

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                    jcverdie
                    wrote on last edited by
                    #16

                    Indeed I've done that, but qt is not installed in opt for me, it is in /usr/local/qt5pi/lib !
                    And obviously I did not picked up the path, it came out of the box from the guidelines :(

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                      Pinkypanzer
                      wrote on last edited by
                      #17

                      in QT CREATOR you have to set the the path in the system environment

                      cited from the beginners guide:
                      At last, add the LD_LIBRARY_PATH on the “System Environment” and set it to “/usr/local/qt5pi/lib”

                      In my case the path would be "/opt/qt50-snapshot/lib"

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                        Pinkypanzer
                        wrote on last edited by
                        #18

                        Then I'm sorry, I don't know what your problem is.
                        Did you check the path is available at you pi and you have the rights to read from it?

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                          pdsuk
                          wrote on last edited by
                          #19

                          @jcverdie

                          I followed the beginners guide like yourself also and ran into the same problem.

                          Apps deployed and executed from within QtCreator ran correctly on the device but if I went to the command line on the RPi itself, I couldn't execute them (libQtQuick.. not found)

                          Running: export LD_LIBRARY_PATH=/usr/local/qt5pi/lib/

                          Fixes this problem but only when logged in as root!

                          If I export LD_LIBRARY_PATH as user 'pi' I still cannot execute the binary (same error as before).

                          Stranger still, QtCreator which can deploy and run the binary correctly, is logging in via ssh with user 'pi' !

                          Any ideas why this is happening?

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