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Problems when adding serialport module in Qt project

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  • douglasD douglas

    @J.Hilk Where can I found the procedure to cross-compile the serial port module?
    Thank you.

    J.HilkJ Online
    J.HilkJ Online
    J.Hilk
    Moderators
    wrote on last edited by
    #33

    @douglas like you did the other modules

    git clone git://code.qt.io/qt/<qt-module>.git -b <qt-version>
    cd <qt-module>
    
    qmake
    make
    make install
    

    Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


    Q: What's that?
    A: It's blue light.
    Q: What does it do?
    A: It turns blue.

    Pablo J. RoginaP 1 Reply Last reply
    1
    • J.HilkJ J.Hilk

      @douglas like you did the other modules

      git clone git://code.qt.io/qt/<qt-module>.git -b <qt-version>
      cd <qt-module>
      
      qmake
      make
      make install
      
      Pablo J. RoginaP Offline
      Pablo J. RoginaP Offline
      Pablo J. Rogina
      wrote on last edited by
      #34

      @douglas if you could please show us

      How did you cross-compile for your target device?

      It may help understanding your issue

      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

      douglasD 1 Reply Last reply
      1
      • Pablo J. RoginaP Pablo J. Rogina

        @douglas if you could please show us

        How did you cross-compile for your target device?

        It may help understanding your issue

        douglasD Offline
        douglasD Offline
        douglas
        wrote on last edited by
        #35

        @Pablo-J.-Rogina , after the Qt Creator installation, I followed the indication from 2.1 to 2.7 chapter here:
        http://variwiki.com/index.php?title=Yocto_Qt_Creator&release=RELEASE_MORTY_V1.0_DART-6UL#QtCreator_configuration
        in which, as far as I see, the environment is configured to cross-compile for my target device.
        Now, I am able to create a simple GUI application and run it on my target device, but I can't add the serialport component (in order to manage a RS485 communication) in my project.
        Unfortunatelly, I'm a beginner in this matter!
        Thanks a lot!

        Pablo J. RoginaP 1 Reply Last reply
        0
        • douglasD douglas

          @Pablo-J.-Rogina , after the Qt Creator installation, I followed the indication from 2.1 to 2.7 chapter here:
          http://variwiki.com/index.php?title=Yocto_Qt_Creator&release=RELEASE_MORTY_V1.0_DART-6UL#QtCreator_configuration
          in which, as far as I see, the environment is configured to cross-compile for my target device.
          Now, I am able to create a simple GUI application and run it on my target device, but I can't add the serialport component (in order to manage a RS485 communication) in my project.
          Unfortunatelly, I'm a beginner in this matter!
          Thanks a lot!

          Pablo J. RoginaP Offline
          Pablo J. RoginaP Offline
          Pablo J. Rogina
          wrote on last edited by
          #36

          @douglas said in Problems when adding serialport module in Qt project:

          Now, I am able to create a simple GUI application and run it on my target device

          Ok, that's a great step. Reading briefly the link you posted to that wiki page, I assume you setup your environment in a Linux PC and using Qt Creator there, you built that simple GUI app that Qt Creator deployed and run in your device.

          If that's correct, I'd try the following:

          1. from command line in let's say /home/douglas/projects do
          cd /home/douglas/projects
          git clone git://code.qt.io/qt/qtserialport.git -b 5.9
          cd qtserialport
          

          so you should now have a folder /home/douglas/projects/qtserialport will sources for Qt serial port module release 5.9 (the Qt release should match what you have in your dev environment/device, you didn't stated it so far).
          2. run commands:

          /opt/fslc-x11/2.2.1/sysroot/x86_64-fslcsdk-linux/usr/bin/qt5/qmake
          make
          make install
          

          once build and install finishes, you should have the .so shared library and headers into the proper location under your host PC (I couldn't figure out the proper location from the wiki page). But look for something like this (version shuold be the one you cloned...):

          ./include/QtSerialPort/qtserialportversion.h
          ./include/QtSerialPort/qserialportinfo.h
          ./include/QtSerialPort/qserialportglobal.h
          ./include/QtSerialPort/5.9.0/QtSerialPort/private/qserialport_p.h
          ./include/QtSerialPort/5.9.0/QtSerialPort/private/qserialportinfo_p.h
          ./include/QtSerialPort/qserialport.h
          

          and

          ./lib/libQt5SerialPort.so
          

          if you succeed here, then you should be able to create a project file (.pro) for your application and add the serial port modulie like this:

          ...
          QT += serialport
          ...
          

          and the magic will flow.

          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

          douglasD 1 Reply Last reply
          2
          • Pablo J. RoginaP Pablo J. Rogina

            @douglas said in Problems when adding serialport module in Qt project:

            Now, I am able to create a simple GUI application and run it on my target device

            Ok, that's a great step. Reading briefly the link you posted to that wiki page, I assume you setup your environment in a Linux PC and using Qt Creator there, you built that simple GUI app that Qt Creator deployed and run in your device.

            If that's correct, I'd try the following:

            1. from command line in let's say /home/douglas/projects do
            cd /home/douglas/projects
            git clone git://code.qt.io/qt/qtserialport.git -b 5.9
            cd qtserialport
            

            so you should now have a folder /home/douglas/projects/qtserialport will sources for Qt serial port module release 5.9 (the Qt release should match what you have in your dev environment/device, you didn't stated it so far).
            2. run commands:

            /opt/fslc-x11/2.2.1/sysroot/x86_64-fslcsdk-linux/usr/bin/qt5/qmake
            make
            make install
            

            once build and install finishes, you should have the .so shared library and headers into the proper location under your host PC (I couldn't figure out the proper location from the wiki page). But look for something like this (version shuold be the one you cloned...):

            ./include/QtSerialPort/qtserialportversion.h
            ./include/QtSerialPort/qserialportinfo.h
            ./include/QtSerialPort/qserialportglobal.h
            ./include/QtSerialPort/5.9.0/QtSerialPort/private/qserialport_p.h
            ./include/QtSerialPort/5.9.0/QtSerialPort/private/qserialportinfo_p.h
            ./include/QtSerialPort/qserialport.h
            

            and

            ./lib/libQt5SerialPort.so
            

            if you succeed here, then you should be able to create a project file (.pro) for your application and add the serial port modulie like this:

            ...
            QT += serialport
            ...
            

            and the magic will flow.

            douglasD Offline
            douglasD Offline
            douglas
            wrote on last edited by
            #37

            @Pablo-J.-Rogina Thanks a lot for your post, I'll now begin to put it into practice. I have just one doubt: if I run:

            qmake --version
            

            I obtain:

            QMake version 2.01a
            Using Qt version 4.8.7 in /usr/lib/x86_64-linux-gnu
            

            So, if I'm not wrong, the installed version of Qt is the 4.8.7 (quite old). When you stated, in your #1 step, "git clone git://code.qt.io/qt/qtserialport.git -b 5.9" were you assuming my Qt version was 5.9? In other words, the serialport version and the installed qt version should be the same?
            If so, how can I upgrade from my actual Qt version to the latest one?
            Thanks a lot!

            aha_1980A 1 Reply Last reply
            0
            • douglasD douglas

              @Pablo-J.-Rogina Thanks a lot for your post, I'll now begin to put it into practice. I have just one doubt: if I run:

              qmake --version
              

              I obtain:

              QMake version 2.01a
              Using Qt version 4.8.7 in /usr/lib/x86_64-linux-gnu
              

              So, if I'm not wrong, the installed version of Qt is the 4.8.7 (quite old). When you stated, in your #1 step, "git clone git://code.qt.io/qt/qtserialport.git -b 5.9" were you assuming my Qt version was 5.9? In other words, the serialport version and the installed qt version should be the same?
              If so, how can I upgrade from my actual Qt version to the latest one?
              Thanks a lot!

              aha_1980A Offline
              aha_1980A Offline
              aha_1980
              Lifetime Qt Champion
              wrote on last edited by
              #38

              @douglas

              you can have multiple Qt versions installed, so please check carefully which one you use.

              For the qmakes that are not in PATH, you have to specify the full path, e.g. /opt/Qt/5.9.0/bin/qmake

              Regards

              Qt has to stay free or it will die.

              douglasD 1 Reply Last reply
              1
              • aha_1980A aha_1980

                @douglas

                you can have multiple Qt versions installed, so please check carefully which one you use.

                For the qmakes that are not in PATH, you have to specify the full path, e.g. /opt/Qt/5.9.0/bin/qmake

                Regards

                douglasD Offline
                douglasD Offline
                douglas
                wrote on last edited by
                #39

                @aha_1980 how I can upgrade to the latest Qt version and set it as default in my project? After this I will be sure to use the Qt version 5.9 and I will apply the steps suggested by @Pablo-J-Rogina
                Thank you!

                aha_1980A 1 Reply Last reply
                0
                • douglasD douglas

                  @aha_1980 how I can upgrade to the latest Qt version and set it as default in my project? After this I will be sure to use the Qt version 5.9 and I will apply the steps suggested by @Pablo-J-Rogina
                  Thank you!

                  aha_1980A Offline
                  aha_1980A Offline
                  aha_1980
                  Lifetime Qt Champion
                  wrote on last edited by
                  #40

                  @douglas

                  First you should find out which Qt versions you have on your computer. Qt 4.8.7 is surely from Ubuntu and is a native Qt - you build programs that run on your computer. What you want, is a cross Qt, to run programs on your embedded device.

                  As you said you have already done this, you surely have a second Qt version (I cannot tell you which one it is). And this Qt version has a qmake which you need to call to compile Qt programs against this Qt library.

                  Regards

                  Qt has to stay free or it will die.

                  douglasD 1 Reply Last reply
                  1
                  • aha_1980A aha_1980

                    @douglas

                    First you should find out which Qt versions you have on your computer. Qt 4.8.7 is surely from Ubuntu and is a native Qt - you build programs that run on your computer. What you want, is a cross Qt, to run programs on your embedded device.

                    As you said you have already done this, you surely have a second Qt version (I cannot tell you which one it is). And this Qt version has a qmake which you need to call to compile Qt programs against this Qt library.

                    Regards

                    douglasD Offline
                    douglasD Offline
                    douglas
                    wrote on last edited by
                    #41

                    @aha_1980 Thanks. In Qt Creator I set Qt 5.7.1 in the "Qt Version" for the selected kit for my project. Now I can add the serialport module in my .pro file and build the app, but when I try to run it on my target device, the application does not start and the following error appears:

                    error while loading shared libraries: libQt5SerialPort.so.5: cannot open shared object file: No such file or directory
                    

                    Is it related to the serialport module that is not cross compiled or have I to install some dependencies on the target device itself?
                    Thank you!

                    aha_1980A 1 Reply Last reply
                    0
                    • douglasD douglas

                      @aha_1980 Thanks. In Qt Creator I set Qt 5.7.1 in the "Qt Version" for the selected kit for my project. Now I can add the serialport module in my .pro file and build the app, but when I try to run it on my target device, the application does not start and the following error appears:

                      error while loading shared libraries: libQt5SerialPort.so.5: cannot open shared object file: No such file or directory
                      

                      Is it related to the serialport module that is not cross compiled or have I to install some dependencies on the target device itself?
                      Thank you!

                      aha_1980A Offline
                      aha_1980A Offline
                      aha_1980
                      Lifetime Qt Champion
                      wrote on last edited by
                      #42

                      @douglas said in Problems when adding serialport module in Qt project:

                      Is it related to the serialport module that is not cross compiled or have I to install some dependencies on the target device itself?

                      You're already on the right track. You need to cross-compile QtSerialPort for your embedded device, and then you need to deploy (copy over) these libraries to the device, because your final app is also running there.

                      Qt has to stay free or it will die.

                      douglasD 2 Replies Last reply
                      1
                      • aha_1980A aha_1980

                        @douglas said in Problems when adding serialport module in Qt project:

                        Is it related to the serialport module that is not cross compiled or have I to install some dependencies on the target device itself?

                        You're already on the right track. You need to cross-compile QtSerialPort for your embedded device, and then you need to deploy (copy over) these libraries to the device, because your final app is also running there.

                        douglasD Offline
                        douglasD Offline
                        douglas
                        wrote on last edited by
                        #43

                        @aha_1980 Ok,thanks! I just did the following on my host PC:

                        $ git clone git://code.qt.io/qt/qtserialport.git
                        $ mkdir qtserialport-build
                        $ cd qtserialport-build
                        $ qmake ../qtserialport/qtserialport.pro
                        

                        but the last command (qmake) gives the following:

                        Project MESSAGE: Cannot build current QtSerialPort sources with Qt version 4.8.7.
                        Project ERROR: Use at least Qt 5.0.0 or try to download QtSerialPort for Qt4.
                        

                        It is clear that I need to use a newer qmake, perhaps the default one is an older version. How can I run that command with a qmake version 5? Where should it be located? Or how can I "change the default one"?
                        Thanks for your patience.

                        1 Reply Last reply
                        0
                        • aha_1980A aha_1980

                          @douglas said in Problems when adding serialport module in Qt project:

                          Is it related to the serialport module that is not cross compiled or have I to install some dependencies on the target device itself?

                          You're already on the right track. You need to cross-compile QtSerialPort for your embedded device, and then you need to deploy (copy over) these libraries to the device, because your final app is also running there.

                          douglasD Offline
                          douglasD Offline
                          douglas
                          wrote on last edited by
                          #44

                          @aha_1980 Done, I found the qmake for version 5 and run the qmake command.
                          Now, when I run the

                          make
                          make install
                          

                          this error appears:

                          fatal error: qdeadlinetimer.h: File o directory non esistente
                          compilation terminated.
                          

                          Which can be the solution?

                          aha_1980A 1 Reply Last reply
                          0
                          • douglasD douglas

                            @aha_1980 Done, I found the qmake for version 5 and run the qmake command.
                            Now, when I run the

                            make
                            make install
                            

                            this error appears:

                            fatal error: qdeadlinetimer.h: File o directory non esistente
                            compilation terminated.
                            

                            Which can be the solution?

                            aha_1980A Offline
                            aha_1980A Offline
                            aha_1980
                            Lifetime Qt Champion
                            wrote on last edited by
                            #45

                            @douglas you are tryin to compile a new QSerialPort against an older Qt.

                            Add a git checkout -b v5.7.1 directly after the git clone command and rebuild.

                            Qt has to stay free or it will die.

                            douglasD 1 Reply Last reply
                            0
                            • aha_1980A aha_1980

                              @douglas you are tryin to compile a new QSerialPort against an older Qt.

                              Add a git checkout -b v5.7.1 directly after the git clone command and rebuild.

                              douglasD Offline
                              douglasD Offline
                              douglas
                              wrote on last edited by
                              #46

                              @aha_1980 I add "git checkout -b v5.7.1" , but the qdeadlinetimer.h error shown above still remains during the make procedure. Any hints?

                              jsulmJ 1 Reply Last reply
                              0
                              • douglasD douglas

                                @aha_1980 I add "git checkout -b v5.7.1" , but the qdeadlinetimer.h error shown above still remains during the make procedure. Any hints?

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

                                @douglas Did you try to delete the build folder, create new one and to start from there?

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

                                douglasD 1 Reply Last reply
                                1
                                • jsulmJ jsulm

                                  @douglas Did you try to delete the build folder, create new one and to start from there?

                                  douglasD Offline
                                  douglasD Offline
                                  douglas
                                  wrote on last edited by
                                  #48

                                  @jsulm Yes, I did. I always obtain the

                                  fatal error: qdeadlinetimer.h: File o directory non esistente
                                  compilation terminated.
                                  
                                  aha_1980A 1 Reply Last reply
                                  0
                                  • douglasD douglas

                                    @jsulm Yes, I did. I always obtain the

                                    fatal error: qdeadlinetimer.h: File o directory non esistente
                                    compilation terminated.
                                    
                                    aha_1980A Offline
                                    aha_1980A Offline
                                    aha_1980
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #49

                                    @douglas please send the output of git status

                                    Qt has to stay free or it will die.

                                    douglasD 1 Reply Last reply
                                    0
                                    • aha_1980A aha_1980

                                      @douglas please send the output of git status

                                      douglasD Offline
                                      douglasD Offline
                                      douglas
                                      wrote on last edited by
                                      #50

                                      @aha_1980

                                      Sul branch v5.7.1
                                      Untracked files:
                                        (use "git add <file>..." to include in what will be committed)
                                      
                                      	./
                                      
                                      nothing added to commit but untracked files present (use "git add" to track)
                                      

                                      Am I missing something?

                                      aha_1980A 1 Reply Last reply
                                      0
                                      • douglasD douglas

                                        @aha_1980

                                        Sul branch v5.7.1
                                        Untracked files:
                                          (use "git add <file>..." to include in what will be committed)
                                        
                                        	./
                                        
                                        nothing added to commit but untracked files present (use "git add" to track)
                                        

                                        Am I missing something?

                                        aha_1980A Offline
                                        aha_1980A Offline
                                        aha_1980
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #51

                                        @douglas Looks good so far.

                                        But let's move slowly. I re-read you post from 5 hours ago:

                                        @aha_1980 Thanks. In Qt Creator I set Qt 5.7.1 in the "Qt Version" for the selected kit for my project. Now I can add the serialport module in my .pro file and build the app

                                        If you can build the app, then you already have the serialport module!

                                        but when I try to run it on my target device, the application does not start and the following error appears:

                                        But you don't have the libraries on your target device.

                                        Qt has to stay free or it will die.

                                        douglasD 1 Reply Last reply
                                        0
                                        • aha_1980A aha_1980

                                          @douglas Looks good so far.

                                          But let's move slowly. I re-read you post from 5 hours ago:

                                          @aha_1980 Thanks. In Qt Creator I set Qt 5.7.1 in the "Qt Version" for the selected kit for my project. Now I can add the serialport module in my .pro file and build the app

                                          If you can build the app, then you already have the serialport module!

                                          but when I try to run it on my target device, the application does not start and the following error appears:

                                          But you don't have the libraries on your target device.

                                          douglasD Offline
                                          douglasD Offline
                                          douglas
                                          wrote on last edited by
                                          #52

                                          @aha_1980 Thanks, I understand. In order to obtain those libraries on my target device is something that I should copy from my host PC onto the device itself or I should install directly on the device side in any way?

                                          aha_1980A Pablo J. RoginaP 2 Replies Last reply
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