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[TUTO] Build Qt to cross compile for arm

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  • samapolloS Offline
    samapolloS Offline
    samapollo
    wrote on last edited by samapollo
    #32

    But the Qt I have on my linux where I built the project is for ARM. Its the one for this project.
    So should I just use the build from this post on my pi?

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    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #33

      I didn't say the contrary: both builds are valid. The one you have on your desktop machine is a Qt For Embedded Linux build which uses QWS while on your Raspbian you have a standard as in "desktop standard" build of Qt 4.

      It depends on how you want to use your application on your Pi. If its the QWS functionality that you need then you have to install your self-built Qt 4 on the Pi.

      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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      • samapolloS Offline
        samapolloS Offline
        samapollo
        wrote on last edited by samapollo
        #34

        What if I just created a deb package on my Linux machine, and then used that on the Pi?
        Or is it better to just do the custom build? (really dont want to do that painful process)
        Is this a guide I can use as a base for this build?:
        http://processors.wiki.ti.com/index.php/Building_Qt_with_OpenGL_ES_accelerated_by_SGX

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        • samapolloS Offline
          samapolloS Offline
          samapollo
          wrote on last edited by
          #35

          So I managed to compile and run a Hello World project. Creating the make and executable on my Linux with this ARM build. Then moving it onto the Pi and running it. But when I try anything more complex I am getting the same error.

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          • SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #36

            Again: this is an Qt for Embedded Linux build see the -embedded arm configure option. Thus my question, are you going to use the X Server of your Pi ?

            If yes, you have to rebuild Qt without the embedded options but keep the ARM target.

            If no, then one basic option is to copy the content of the cross-compiled Qt installation folder over to your Pi at the same place and you should be good to go (you can later remove stuff like the host tools headers etc.)

            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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            • samapolloS Offline
              samapolloS Offline
              samapollo
              wrote on last edited by
              #37

              How can I do this compilation with opengl?

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              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #38

                Which version of Qt are you currently using ?

                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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                • H Offline
                  H Offline
                  HafsaElif
                  wrote on last edited by
                  #39

                  Execute this command to install Qt in the /usr/local/Qt-4.8.5-arm/ directory : ./configure -opensource -confirm-license -prefix /usr/local/Qt-4.8.5-arm -embedded arm -little-endian -no-pch -xplatform qws/linux-arm-gnueabi-g++

                  In this step Did you create /usr/local/Qt-4.8.5-arm/ directory ? or Did created by qt creator when installitaion?

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                  • A Offline
                    A Offline
                    Asha
                    wrote on last edited by
                    #40
                    This post is deleted!
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                    • A Offline
                      A Offline
                      Asha
                      wrote on last edited by
                      #41

                      Hi,

                      I am not understood that fourth step,

                      Go to /home/<yourUserName>/
                      Execute this command to install Qt in the /usr/local/Qt-4.8.5-arm/ directory : ./configure -opensource -confirm-license -prefix /usr/local/Qt-4.8.5-arm -embedded arm -little-endian -no-pch -xplatform qws/linux-arm-gnueabi-g++
                      qt-everywhere-opensource-src-4.8.5/

                      why beacuse,when i go /home/<username> there is no such file called (this present in installQt directory) and in /usr/local also not present the Qt-4.8.5

                      anyone help how to processed next..
                      thankyou

                      jsulmJ 1 Reply Last reply
                      0
                      • A Asha

                        Hi,

                        I am not understood that fourth step,

                        Go to /home/<yourUserName>/
                        Execute this command to install Qt in the /usr/local/Qt-4.8.5-arm/ directory : ./configure -opensource -confirm-license -prefix /usr/local/Qt-4.8.5-arm -embedded arm -little-endian -no-pch -xplatform qws/linux-arm-gnueabi-g++
                        qt-everywhere-opensource-src-4.8.5/

                        why beacuse,when i go /home/<username> there is no such file called (this present in installQt directory) and in /usr/local also not present the Qt-4.8.5

                        anyone help how to processed next..
                        thankyou

                        jsulmJ Offline
                        jsulmJ Offline
                        jsulm
                        Lifetime Qt Champion
                        wrote on last edited by
                        #42

                        @asha You should not copy the steps exactly, you have to adapt them to your environment:
                        Go to /home/<yourUserName>/ - this means go to your home directory
                        Qt-4.8.5 - change that to the Qt version you want to compile.

                        https://forum.qt.io/topic/113070/qt-code-of-conduct

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                        0
                        • A Offline
                          A Offline
                          Asha
                          wrote on last edited by
                          #43

                          Sir,

                          I have uninstalled everything(which means cross compiler and my first qt version)

                          now i followed the steps,as said in above..

                          so now I am not getting where to execute.

                          can I execute where i am getting the configure file.

                          jsulmJ 1 Reply Last reply
                          0
                          • A Asha

                            Sir,

                            I have uninstalled everything(which means cross compiler and my first qt version)

                            now i followed the steps,as said in above..

                            so now I am not getting where to execute.

                            can I execute where i am getting the configure file.

                            jsulmJ Offline
                            jsulmJ Offline
                            jsulm
                            Lifetime Qt Champion
                            wrote on last edited by
                            #44

                            @asha said in [TUTO] Build Qt to cross compile for arm:

                            so now I am not getting where to execute

                            execute what? configure?
                            "can I execute where i am getting the configure file" - configure file is part of Qt source code. So, download Qt source code, extract it to a directory, go to that directory and execute configure there...

                            https://forum.qt.io/topic/113070/qt-code-of-conduct

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                            • A Offline
                              A Offline
                              Asha
                              wrote on last edited by
                              #45

                              Hi,
                              I execute the configure file,as you can see here

                              0_1568294113805_successbuild.png

                              After this Executed the make,the result is:

                              0_1568294186956_error2.png

                              so what that error says?how to solve this..

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                              0
                              • A Offline
                                A Offline
                                Asha
                                wrote on last edited by
                                #46

                                Hi,

                                Any suggestions,

                                jsulmJ 1 Reply Last reply
                                0
                                • A Asha

                                  Hi,

                                  Any suggestions,

                                  jsulmJ Offline
                                  jsulmJ Offline
                                  jsulm
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #47

                                  @asha Please show how you call configure.
                                  Also, it is better to post text instead of screen-shots...

                                  https://forum.qt.io/topic/113070/qt-code-of-conduct

                                  A 1 Reply Last reply
                                  0
                                  • A Offline
                                    A Offline
                                    Asha
                                    wrote on last edited by
                                    #48

                                    I called configure
                                    0_1568359047816_calling configure.png .

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                                    0
                                    • jsulmJ jsulm

                                      @asha Please show how you call configure.
                                      Also, it is better to post text instead of screen-shots...

                                      A Offline
                                      A Offline
                                      Asha
                                      wrote on last edited by
                                      #49

                                      @jsulm sorry,ffor some of the reason using screenshots.

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                                      0
                                      • A Offline
                                        A Offline
                                        Asha
                                        wrote on last edited by
                                        #50

                                        Hi,

                                        Can anyone say,

                                        what it does: fourth step

                                        ."/configure -opensource -confirm-license -prefix /usr/local/Qt-4.8.5-arm -embedded arm -little-endian -no-pch -xplatform qws/linux-arm-gnueabi-g++"

                                        specially this part "embedded arm -little-endian -no-pch -xplatform qws/linux-arm-gnueabi-g++"

                                        because,

                                        I downloaded qt src code 5.7.1 and arm-linux-gnueabihf-gcc 6.5.0, and I found my qmake.conf file in "/home/<username>/Downloads/qt-everywhere-opensource-src-5.7.1/qtbase/mkspecs/linux-arm-gnueabi-g++"

                                        So,now I need to configure,not getting the above path,I don't have qws directory,

                                        can I give just ./configure for configuration?

                                        MijazM 1 Reply Last reply
                                        0
                                        • A Asha

                                          Hi,

                                          Can anyone say,

                                          what it does: fourth step

                                          ."/configure -opensource -confirm-license -prefix /usr/local/Qt-4.8.5-arm -embedded arm -little-endian -no-pch -xplatform qws/linux-arm-gnueabi-g++"

                                          specially this part "embedded arm -little-endian -no-pch -xplatform qws/linux-arm-gnueabi-g++"

                                          because,

                                          I downloaded qt src code 5.7.1 and arm-linux-gnueabihf-gcc 6.5.0, and I found my qmake.conf file in "/home/<username>/Downloads/qt-everywhere-opensource-src-5.7.1/qtbase/mkspecs/linux-arm-gnueabi-g++"

                                          So,now I need to configure,not getting the above path,I don't have qws directory,

                                          can I give just ./configure for configuration?

                                          MijazM Offline
                                          MijazM Offline
                                          Mijaz
                                          wrote on last edited by
                                          #51

                                          @Asha
                                          Same problem.

                                          1 Reply Last reply
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