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undefined reference to `vtable for shutdown'

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  • SPlattenS SPlatten

    @JonB , done, many times:

    make clean
    cmake ${variable}
    make
    
    J.HilkJ Offline
    J.HilkJ Offline
    J.Hilk
    Moderators
    wrote on last edited by
    #4

    @SPlatten

    delete all the previously generated

    clean is not infallible, actually delete the shadow build folder.


    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.

    SPlattenS 1 Reply Last reply
    1
    • J.HilkJ J.Hilk

      @SPlatten

      delete all the previously generated

      clean is not infallible, actually delete the shadow build folder.

      SPlattenS Offline
      SPlattenS Offline
      SPlatten
      wrote on last edited by
      #5

      @J-Hilk , how do I do that?

      Kind Regards,
      Sy

      J.HilkJ 1 Reply Last reply
      0
      • SPlattenS SPlatten

        @J-Hilk , how do I do that?

        J.HilkJ Offline
        J.HilkJ Offline
        J.Hilk
        Moderators
        wrote on last edited by
        #6

        @SPlatten selected it in the file explorer of your choice, and press delete on your keyboard


        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.

        SPlattenS 1 Reply Last reply
        0
        • J.HilkJ J.Hilk

          @SPlatten selected it in the file explorer of your choice, and press delete on your keyboard

          SPlattenS Offline
          SPlattenS Offline
          SPlatten
          wrote on last edited by
          #7

          @J-Hilk , thank you, how do I identify its where abouts?

          Kind Regards,
          Sy

          J.HilkJ 1 Reply Last reply
          0
          • SPlattenS SPlatten

            @J-Hilk , thank you, how do I identify its where abouts?

            J.HilkJ Offline
            J.HilkJ Offline
            J.Hilk
            Moderators
            wrote on last edited by J.Hilk
            #8

            @SPlatten if you're using QtCreator, in the project settings tab, its usually parallel to your source folder


            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.

            SPlattenS 1 Reply Last reply
            0
            • J.HilkJ J.Hilk

              @SPlatten if you're using QtCreator, in the project settings tab, its usually parallel to your source folder

              SPlattenS Offline
              SPlattenS Offline
              SPlatten
              wrote on last edited by SPlatten
              #9

              @J-Hilk , unfortunately not, the build process is entirely using cmake. I've just renamed the build folder and then started off the build again with a new build folder, all the object files were in subfolders of the build folder.

              Kind Regards,
              Sy

              J.HilkJ 1 Reply Last reply
              0
              • SPlattenS SPlatten

                @J-Hilk , unfortunately not, the build process is entirely using cmake. I've just renamed the build folder and then started off the build again with a new build folder, all the object files were in subfolders of the build folder.

                J.HilkJ Offline
                J.HilkJ Offline
                J.Hilk
                Moderators
                wrote on last edited by
                #10

                @SPlatten said in undefined reference to `vtable for shutdown':

                @J-Hilk , unfortunately not, the build process is entirely using cmake.

                qmake or cmake make no difference here, build directory is what you're looking for

                e3a5ac17-1669-40a7-b35e-8aaafce58db4-image.png


                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.

                SPlattenS 1 Reply Last reply
                0
                • J.HilkJ J.Hilk

                  @SPlatten said in undefined reference to `vtable for shutdown':

                  @J-Hilk , unfortunately not, the build process is entirely using cmake.

                  qmake or cmake make no difference here, build directory is what you're looking for

                  e3a5ac17-1669-40a7-b35e-8aaafce58db4-image.png

                  SPlattenS Offline
                  SPlattenS Offline
                  SPlatten
                  wrote on last edited by
                  #11

                  @J-Hilk , build just completed in new folder with exactly the same results.

                  Kind Regards,
                  Sy

                  J.HilkJ 1 Reply Last reply
                  0
                  • SPlattenS SPlatten

                    @J-Hilk , build just completed in new folder with exactly the same results.

                    J.HilkJ Offline
                    J.HilkJ Offline
                    J.Hilk
                    Moderators
                    wrote on last edited by J.Hilk
                    #12

                    @SPlatten ok, one point less to check, very unusual

                    ok, try adding virtual to your destructor declaration.

                    did you post the whole class?
                    are there any other functions, virtual or not, in there?


                    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.

                    SPlattenS 2 Replies Last reply
                    0
                    • J.HilkJ J.Hilk

                      @SPlatten ok, one point less to check, very unusual

                      ok, try adding virtual to your destructor declaration.

                      did you post the whole class?
                      are there any other functions, virtual or not, in there?

                      SPlattenS Offline
                      SPlattenS Offline
                      SPlatten
                      wrote on last edited by
                      #13

                      @J-Hilk . that was the entire class, I've added virtual to the destructor prototype, rebuilding now.

                      Kind Regards,
                      Sy

                      J.HilkJ 1 Reply Last reply
                      0
                      • J.HilkJ J.Hilk

                        @SPlatten ok, one point less to check, very unusual

                        ok, try adding virtual to your destructor declaration.

                        did you post the whole class?
                        are there any other functions, virtual or not, in there?

                        SPlattenS Offline
                        SPlattenS Offline
                        SPlatten
                        wrote on last edited by
                        #14

                        @J-Hilk, Exactly the same results.

                        Kind Regards,
                        Sy

                        1 Reply Last reply
                        0
                        • SPlattenS SPlatten

                          @J-Hilk . that was the entire class, I've added virtual to the destructor prototype, rebuilding now.

                          J.HilkJ Offline
                          J.HilkJ Offline
                          J.Hilk
                          Moderators
                          wrote on last edited by J.Hilk
                          #15

                          @SPlatten did you make changes in your CMakeLists.txt ?

                          I assume you have
                          set(CMAKE_AUTOUIC ON)
                          set(CMAKE_AUTOMOC ON)
                          set(CMAKE_AUTORCC ON)
                          set (CMAKE_INCLUDE_CURRENT_DIR ON)

                          in it ?

                          and
                          set(PROJECT_SOURCES ....)contains your new class ?
                          as well as
                          qt5_wrap_cpp qt4_wrap_cpp() (I think that was needed for older version ?)


                          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.

                          SPlattenS 2 Replies Last reply
                          0
                          • J.HilkJ J.Hilk

                            @SPlatten did you make changes in your CMakeLists.txt ?

                            I assume you have
                            set(CMAKE_AUTOUIC ON)
                            set(CMAKE_AUTOMOC ON)
                            set(CMAKE_AUTORCC ON)
                            set (CMAKE_INCLUDE_CURRENT_DIR ON)

                            in it ?

                            and
                            set(PROJECT_SOURCES ....)contains your new class ?
                            as well as
                            qt5_wrap_cpp qt4_wrap_cpp() (I think that was needed for older version ?)

                            SPlattenS Offline
                            SPlattenS Offline
                            SPlatten
                            wrote on last edited by
                            #16

                            @J-Hilk , I've added the set calls from your post to the make file, the qt4 bits that I did have:

                            find_package(Qt4 REQUIRED)
                            include(${QT_USE_FILE})
                            foreach(loop_var ${QT_LIBRARIES})
                              string(REPLACE lib64 lib32 loop_var ${loop_var})
                              set(QT_LIBRARIES_32 ${QT_LIBRARIES_32} ${loop_var})
                            endforeach(loop_var)
                            qt4_wrap_ui(UI_HEADERS ${FORMS})
                            qt4_wrap_cpp(MOC_SRCS ${HEADERS})
                            

                            Kind Regards,
                            Sy

                            1 Reply Last reply
                            0
                            • J.HilkJ J.Hilk

                              @SPlatten did you make changes in your CMakeLists.txt ?

                              I assume you have
                              set(CMAKE_AUTOUIC ON)
                              set(CMAKE_AUTOMOC ON)
                              set(CMAKE_AUTORCC ON)
                              set (CMAKE_INCLUDE_CURRENT_DIR ON)

                              in it ?

                              and
                              set(PROJECT_SOURCES ....)contains your new class ?
                              as well as
                              qt5_wrap_cpp qt4_wrap_cpp() (I think that was needed for older version ?)

                              SPlattenS Offline
                              SPlattenS Offline
                              SPlatten
                              wrote on last edited by
                              #17

                              @J-Hilk , Unfortunately, still the same result.

                              Kind Regards,
                              Sy

                              J.HilkJ 1 Reply Last reply
                              0
                              • SPlattenS SPlatten

                                @J-Hilk , Unfortunately, still the same result.

                                J.HilkJ Offline
                                J.HilkJ Offline
                                J.Hilk
                                Moderators
                                wrote on last edited by
                                #18

                                @SPlatten Well,

                                I'm sorry to say it, but I'm out of ideas. My experience with cmake is very limited and does not reach further :(


                                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.

                                SPlattenS 1 Reply Last reply
                                0
                                • J.HilkJ J.Hilk

                                  @SPlatten Well,

                                  I'm sorry to say it, but I'm out of ideas. My experience with cmake is very limited and does not reach further :(

                                  SPlattenS Offline
                                  SPlattenS Offline
                                  SPlatten
                                  wrote on last edited by
                                  #19

                                  @J-Hilk , thanks for your time and efforts.

                                  Kind Regards,
                                  Sy

                                  JoeCFDJ 1 Reply Last reply
                                  0
                                  • SPlattenS SPlatten

                                    @J-Hilk , thanks for your time and efforts.

                                    JoeCFDJ Offline
                                    JoeCFDJ Offline
                                    JoeCFD
                                    wrote on last edited by JoeCFD
                                    #20

                                    @SPlatten in your source dir where cmake file is located do the following:
                                    mkdir build
                                    cd build
                                    cmake .. -Dyour settings
                                    make -j4

                                    Try to build your code in the build folder all the time. In case you have your vtable issues, simply rm -rf * to delete everything in build dir and redo cmake. Do this only in build dir. Be very careful with rm -rf *. You have to have svn or git for your sources.

                                    SPlattenS 2 Replies Last reply
                                    0
                                    • JoeCFDJ JoeCFD

                                      @SPlatten in your source dir where cmake file is located do the following:
                                      mkdir build
                                      cd build
                                      cmake .. -Dyour settings
                                      make -j4

                                      Try to build your code in the build folder all the time. In case you have your vtable issues, simply rm -rf * to delete everything in build dir and redo cmake. Do this only in build dir. Be very careful with rm -rf *. You have to have svn or git for your sources.

                                      SPlattenS Offline
                                      SPlattenS Offline
                                      SPlatten
                                      wrote on last edited by
                                      #21

                                      @JoeCFD , thank you, will give this a go now, I've been doing the following:

                                      Delete build folder
                                      Create build folder
                                      From build folder cmake ${myvariable}
                                      From build folder make

                                      I will try using -j4 on the make.

                                      Kind Regards,
                                      Sy

                                      JonBJ 1 Reply Last reply
                                      0
                                      • SPlattenS SPlatten

                                        @JoeCFD , thank you, will give this a go now, I've been doing the following:

                                        Delete build folder
                                        Create build folder
                                        From build folder cmake ${myvariable}
                                        From build folder make

                                        I will try using -j4 on the make.

                                        JonBJ Offline
                                        JonBJ Offline
                                        JonB
                                        wrote on last edited by
                                        #22

                                        @SPlatten
                                        Well make -j4 isn't going to fix anything :)

                                        Your code looks right to me (especially the Q_OBJECT, whose absence/change can often cause this). Given that you say you have cleaned everything out and rebuilt I am not sure what is wrong (unless there is some artefact left around somewhere it is still seeing).

                                        From the linker messages undefined reference to vtable for 'shutdown' I am unsure whether it is talking about your class shutdown : public QMainWindow { or the Qt-Designer-generated namespace Ui { class shutdown; } (Ui::shutdown). You might just check what is in the generated ui_shutdown.h file to see if it looks good.... (and if that has not been being regenerated, delete it or update the .ui file to make it regenerate, just in case).

                                        SPlattenS 1 Reply Last reply
                                        0
                                        • JoeCFDJ JoeCFD

                                          @SPlatten in your source dir where cmake file is located do the following:
                                          mkdir build
                                          cd build
                                          cmake .. -Dyour settings
                                          make -j4

                                          Try to build your code in the build folder all the time. In case you have your vtable issues, simply rm -rf * to delete everything in build dir and redo cmake. Do this only in build dir. Be very careful with rm -rf *. You have to have svn or git for your sources.

                                          SPlattenS Offline
                                          SPlattenS Offline
                                          SPlatten
                                          wrote on last edited by
                                          #23

                                          @JoeCFD , same result.

                                          Kind Regards,
                                          Sy

                                          JoeCFDJ 1 Reply Last reply
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