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Problems when adding serialport module in Qt project

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  • 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
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            • 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
                0
                • douglasD douglas

                  @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 Offline
                  aha_1980A Offline
                  aha_1980
                  Lifetime Qt Champion
                  wrote on last edited by
                  #53

                  @douglas In the most easy and hacky way, just copy the needed *.so files to the other Qt *.so files on your device.

                  Depending on your cross toolchain, there may be a more clean way (like building a new image), but that - as said - depends on you toolchain.

                  Qt has to stay free or it will die.

                  1 Reply Last reply
                  1
                  • douglasD douglas

                    @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?

                    Pablo J. RoginaP Offline
                    Pablo J. RoginaP Offline
                    Pablo J. Rogina
                    wrote on last edited by
                    #54

                    @douglas as @aha_1980 said, maybe easiest way is to copy the serialport module *.so the same way you're deploying the file(s) for your application. Perhaps at the beginning it's easy to copy the shared library into same folder as application's executable

                    Upvote the answer(s) that helped you solve the issue
                    Use "Topic Tools" button to mark your post as Solved
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                    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
                    0
                    • Pablo J. RoginaP Pablo J. Rogina

                      @douglas as @aha_1980 said, maybe easiest way is to copy the serialport module *.so the same way you're deploying the file(s) for your application. Perhaps at the beginning it's easy to copy the shared library into same folder as application's executable

                      douglasD Offline
                      douglasD Offline
                      douglas
                      wrote on last edited by
                      #55

                      @Pablo-J.-Rogina , @aha_1980 thank you. I expected to find the libQt5SerialPort.so.5 (the missing library) inside the qtserialport folder generated after the steps:

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

                      but I couldn't find it. I searched into my host PC for that file, I found few results, but they are located into the Qt installation folder, they are not cross-compiled for my needs, I think.
                      When exactly that library should be created, or where it should be located?
                      Thanks!

                      jsulmJ 1 Reply Last reply
                      0
                      • douglasD douglas

                        @Pablo-J.-Rogina , @aha_1980 thank you. I expected to find the libQt5SerialPort.so.5 (the missing library) inside the qtserialport folder generated after the steps:

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

                        but I couldn't find it. I searched into my host PC for that file, I found few results, but they are located into the Qt installation folder, they are not cross-compiled for my needs, I think.
                        When exactly that library should be created, or where it should be located?
                        Thanks!

                        jsulmJ Offline
                        jsulmJ Offline
                        jsulm
                        Lifetime Qt Champion
                        wrote on last edited by
                        #56

                        @douglas Are you sure you're cross compiling your app?
                        If so just do

                        ldd YOUR_APP_EXE
                        

                        it will show you which libs it is linked against, you then will know where the serial port lib is.

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

                        douglasD 1 Reply Last reply
                        1
                        • jsulmJ jsulm

                          @douglas Are you sure you're cross compiling your app?
                          If so just do

                          ldd YOUR_APP_EXE
                          

                          it will show you which libs it is linked against, you then will know where the serial port lib is.

                          douglasD Offline
                          douglasD Offline
                          douglas
                          wrote on last edited by
                          #57

                          @jsulm the ldd command does not give any result; it gives a message saying it is "not a dynamic exacutable"..

                          1 Reply Last reply
                          0
                          • douglasD Offline
                            douglasD Offline
                            douglas
                            wrote on last edited by
                            #58

                            Solved. The missing libQt5SerialPort.so.5 error on the target device was because that library effectively was not present. On the host side I added that library in the package list of the image and rebuild the image itself.

                            1 Reply Last reply
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