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How to build Qt on system without a GUI?

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #29

    Since you are cross-compiling, you need all dependencies for your target. This is usually done installing the libraries on said target and then sync the content of the file system of the target back to the host so the cross-compiler can use them to do its work.

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

    1 Reply Last reply
    3
    • Pavel_47P Offline
      Pavel_47P Offline
      Pavel_47
      wrote on last edited by
      #30

      I've just checked libxkbcommon-dev and libxkbcommon-x11-dev on RPi. As on Ubuntu they are installed and are newest versions.

      Pablo J. RoginaP 1 Reply Last reply
      0
      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #31

        Did you sync your RPi filesystem back to your host before trying to build Qt ?

        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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        • Pavel_47P Offline
          Pavel_47P Offline
          Pavel_47
          wrote on last edited by
          #32

          Yes, at very first time I executed these commands (as it's suggested here https://wiki.qt.io/RaspberryPi2EGLFS):
          rsync -avz pi@raspberrypi.local:/lib sysroot
          rsync -avz pi@raspberrypi.local:/usr/include sysroot/usr
          rsync -avz pi@raspberrypi.local:/usr/lib sysroot/usr
          rsync -avz pi@raspberrypi.local:/opt/vc sysroot/opt

          Then I did 3 or 4 other attempts to build, but at each of these attempts I didn't proceed with resync with RPi.
          Anyway one thing escapes me .... should I keep connection with RPi while running toolchain build on host ?

          jsulmJ 1 Reply Last reply
          0
          • Pavel_47P Pavel_47

            Yes, at very first time I executed these commands (as it's suggested here https://wiki.qt.io/RaspberryPi2EGLFS):
            rsync -avz pi@raspberrypi.local:/lib sysroot
            rsync -avz pi@raspberrypi.local:/usr/include sysroot/usr
            rsync -avz pi@raspberrypi.local:/usr/lib sysroot/usr
            rsync -avz pi@raspberrypi.local:/opt/vc sysroot/opt

            Then I did 3 or 4 other attempts to build, but at each of these attempts I didn't proceed with resync with RPi.
            Anyway one thing escapes me .... should I keep connection with RPi while running toolchain build on host ?

            jsulmJ Offline
            jsulmJ Offline
            jsulm
            Lifetime Qt Champion
            wrote on last edited by
            #33

            @Pavel_47 said in How to build Qt on system without a GUI?:

            should I keep connection with RPi while running toolchain build on host ?

            No, you just need to sync your sysroot.

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

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            0
            • Pavel_47P Offline
              Pavel_47P Offline
              Pavel_47
              wrote on last edited by
              #34

              I've checked the location of xkbcommon-compose.h. It's Ok:
              alt text
              Then I've tried to compile this:

              #include <xkbcommon/xkbcommon-compose.h>
              int main() {}
              

              It was also Ok

              jsulmJ 1 Reply Last reply
              0
              • Pavel_47P Pavel_47

                I've checked the location of xkbcommon-compose.h. It's Ok:
                alt text
                Then I've tried to compile this:

                #include <xkbcommon/xkbcommon-compose.h>
                int main() {}
                

                It was also Ok

                jsulmJ Offline
                jsulmJ Offline
                jsulm
                Lifetime Qt Champion
                wrote on last edited by
                #35

                @Pavel_47 Is it in your host system or sysroot?

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

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                0
                • Pavel_47P Offline
                  Pavel_47P Offline
                  Pavel_47
                  wrote on last edited by
                  #36

                  @jsulm said in How to build Qt on system without a GUI?:

                  @Pavel_47 Is it in your host system or sysroot?

                  Sorry, I didn't understand what you mean ...
                  The location of the screenshot: /usr/include/xkbcommon on my host
                  The location of .c snippet (where I compiled it): ~/raspi/ on my host

                  jsulmJ 1 Reply Last reply
                  0
                  • Pavel_47P Pavel_47

                    @jsulm said in How to build Qt on system without a GUI?:

                    @Pavel_47 Is it in your host system or sysroot?

                    Sorry, I didn't understand what you mean ...
                    The location of the screenshot: /usr/include/xkbcommon on my host
                    The location of .c snippet (where I compiled it): ~/raspi/ on my host

                    jsulmJ Offline
                    jsulmJ Offline
                    jsulm
                    Lifetime Qt Champion
                    wrote on last edited by
                    #37

                    @Pavel_47 said in How to build Qt on system without a GUI?:

                    /usr/include/xkbcommon on my host

                    That's the point: you need these headers in your sysroot!

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

                    1 Reply Last reply
                    2
                    • Pavel_47P Offline
                      Pavel_47P Offline
                      Pavel_47
                      wrote on last edited by
                      #38

                      Indeed !
                      In ~/raspi/sysroot/usr/include/xkbcommon there is one less file comparing to /usr/include/xkbcommon ... and this missed file is precisely xkbcommon-compose.h.

                      alt text

                      So, I copy xkbcommon-compose.h from /usr/include/xkbcommon to ~/raspi/sysroot/usr/include/xkbcommon and then build Qt toolchain once more ?

                      1 Reply Last reply
                      0
                      • Pavel_47P Offline
                        Pavel_47P Offline
                        Pavel_47
                        wrote on last edited by
                        #39

                        I copied xkbcommon-compose.h from /usr/include/xkbcommon to ~/raspi/sysroot/usr/include/xkbcommon and then run make once more.
                        And it failed one more time.
                        Here is how it finished:
                        alt text

                        Any other suggestions ?

                        Thanks.

                        1 Reply Last reply
                        0
                        • SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #40

                          As we already wrote: you need the library too. And built for your target.

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

                          1 Reply Last reply
                          1
                          • Pavel_47P Offline
                            Pavel_47P Offline
                            Pavel_47
                            wrote on last edited by
                            #41

                            You mean that the errors announce in the screenshot from previous message are still related to the xkbcommon issue ?
                            So I should ask xkbcommon developpers for makefile dedicated for RPi3. Correct ?
                            Let's say I got it, what next ? Where should I put xkbcommon built directory ... i.e. which location in ~/raspi/sysroot.
                            After all ... I wonder if someone already faced this issue ? Or this probles rose for the 1st time ? What about previous Qt releases ? There were no similar issues ?

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                            0
                            • SGaistS Offline
                              SGaistS Offline
                              SGaist
                              Lifetime Qt Champion
                              wrote on last edited by
                              #42

                              It's a library that is now provided on all Linux flavours supported by the Qt project. Prior to that, it was bundled with Qt.

                              So what distribution are you running on your 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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                              0
                              • Pavel_47P Offline
                                Pavel_47P Offline
                                Pavel_47
                                wrote on last edited by
                                #43

                                Linux raspberrypi 4.9.77-v7+

                                1 Reply Last reply
                                0
                                • SGaistS Offline
                                  SGaistS Offline
                                  SGaist
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #44

                                  That's the kernel running on your target.

                                  Are you using Raspbian ? Another distribution ?

                                  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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                                  0
                                  • Pavel_47P Offline
                                    Pavel_47P Offline
                                    Pavel_47
                                    wrote on last edited by
                                    #45

                                    Yes, I use raspbian "Jessie"

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                                    0
                                    • SGaistS Offline
                                      SGaistS Offline
                                      SGaist
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #46

                                      Then, AFAIR, you should have the library. So if it can't be found either:

                                      • it wasn't synchronized properly back to your host machine
                                      • the configure call has not been done from a clean state
                                      • it's not the correct library that was found

                                      For the first point you have to sync the library as well as the symbolic links pointing to it or re-create them in your host copy of the sysroot.

                                      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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                                      0
                                      • Pavel_47P Offline
                                        Pavel_47P Offline
                                        Pavel_47
                                        wrote on last edited by
                                        #47

                                        I did as you suggested:
                                        (1) resync host wit RPi:
                                        rsync -avz pi@raspberrypi.local:/lib sysroot
                                        rsync -avz pi@raspberrypi.local:/usr/include sysroot/usr
                                        rsync -avz pi@raspberrypi.local:/usr/lib sysroot/usr
                                        rsync -avz pi@raspberrypi.local:/opt/vc sysroot/opt

                                        (2) update symbolic names:
                                        ./sysroot-relativelinks.py sysroot
                                        Then rebuild Qt (rather tried to rebuild).
                                        Here is what I got:
                                        alt text

                                        This time it's different ... but still fails

                                        Pablo J. RoginaP 1 Reply Last reply
                                        0
                                        • Pavel_47P Pavel_47

                                          I did as you suggested:
                                          (1) resync host wit RPi:
                                          rsync -avz pi@raspberrypi.local:/lib sysroot
                                          rsync -avz pi@raspberrypi.local:/usr/include sysroot/usr
                                          rsync -avz pi@raspberrypi.local:/usr/lib sysroot/usr
                                          rsync -avz pi@raspberrypi.local:/opt/vc sysroot/opt

                                          (2) update symbolic names:
                                          ./sysroot-relativelinks.py sysroot
                                          Then rebuild Qt (rather tried to rebuild).
                                          Here is what I got:
                                          alt text

                                          This time it's different ... but still fails

                                          Pablo J. RoginaP Offline
                                          Pablo J. RoginaP Offline
                                          Pablo J. Rogina
                                          wrote on last edited by
                                          #48

                                          @Pavel_47 two things please:

                                          1. Your last screenshot doesn't seem to show exact error, I guess you should scroll up
                                          2. stop posting screenshots, paste text instead (it's easier for others to comment back on any line of output for instance...)

                                          Upvote the answer(s) that helped you solve the issue
                                          Use "Topic Tools" button to mark your post as Solved
                                          Add screenshots via postimage.org
                                          Don't ask support requests via chat/PM. Please use the forum so others can benefit from the solution in the future

                                          1 Reply Last reply
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