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undefined reference to qt_static _plugin

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qt 5.5staticplugin
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  • J jsulm
    3 Jan 2019, 11:55

    @NIXIN I think you forgot "QTPLUGIN += " in your pro file as described here: http://doc.qt.io/qt-5/plugins-howto.html#static-plugins

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    NIXIN
    wrote on 3 Jan 2019, 11:57 last edited by
    #3

    @jsulm what should I add with QTPLUGIN +=

    because I am creating my own plugin

    J 1 Reply Last reply 3 Jan 2019, 12:02
    0
    • N NIXIN
      3 Jan 2019, 11:57

      @jsulm what should I add with QTPLUGIN +=

      because I am creating my own plugin

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      jsulm
      Lifetime Qt Champion
      wrote on 3 Jan 2019, 12:02 last edited by jsulm 1 Mar 2019, 12:03
      #4

      @NIXIN Sorry, my post was wrong.
      "Link your application with your plugin library using LIBS in the .pro file." - so, using LIBS is correct. But you're using it wrongly, it should be:

      LIBS    += -L"/home/uidm9805/Qt Projects/static_plugin_qmake/build/plugin_qmake" -lplugin_qmake
      

      Better to use relative paths, see http://doc.qt.io/qt-5/qtwidgets-tools-plugandpaint-app-example.html

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

      N 1 Reply Last reply 3 Jan 2019, 12:05
      0
      • J jsulm
        3 Jan 2019, 12:02

        @NIXIN Sorry, my post was wrong.
        "Link your application with your plugin library using LIBS in the .pro file." - so, using LIBS is correct. But you're using it wrongly, it should be:

        LIBS    += -L"/home/uidm9805/Qt Projects/static_plugin_qmake/build/plugin_qmake" -lplugin_qmake
        

        Better to use relative paths, see http://doc.qt.io/qt-5/qtwidgets-tools-plugandpaint-app-example.html

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        NIXIN
        wrote on 3 Jan 2019, 12:05 last edited by NIXIN 1 Mar 2019, 12:06
        #5

        @jsulm I tried using LIBS += the way you suggested, however still it is not working...
        getting same errors again

        J 1 Reply Last reply 3 Jan 2019, 12:15
        0
        • N NIXIN
          3 Jan 2019, 12:05

          @jsulm I tried using LIBS += the way you suggested, however still it is not working...
          getting same errors again

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          jsulm
          Lifetime Qt Champion
          wrote on 3 Jan 2019, 12:15 last edited by
          #6

          @NIXIN Can you show your LIBS line from your pro file?

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

          N 1 Reply Last reply 3 Jan 2019, 12:16
          0
          • J jsulm
            3 Jan 2019, 12:15

            @NIXIN Can you show your LIBS line from your pro file?

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            NIXIN
            wrote on 3 Jan 2019, 12:16 last edited by
            #7

            @jsulm

            TEMPLATE = app
            QT      += widgets
            
            HEADERS  = interface.h
            
            SOURCES += main.cpp
            
            #LIBS    += "/home/uidm9805/Qt Projects/static_plugin_qmake/build/plugin_qmake/libplugin_qmake.a"
            
            LIBS    += -L"/home/uidm9805/Qt Projects/static_plugin_qmake/build/plugin_qmake" -lplugin_qmake
            
            J 1 Reply Last reply 3 Jan 2019, 12:18
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            • N NIXIN
              3 Jan 2019, 12:16

              @jsulm

              TEMPLATE = app
              QT      += widgets
              
              HEADERS  = interface.h
              
              SOURCES += main.cpp
              
              #LIBS    += "/home/uidm9805/Qt Projects/static_plugin_qmake/build/plugin_qmake/libplugin_qmake.a"
              
              LIBS    += -L"/home/uidm9805/Qt Projects/static_plugin_qmake/build/plugin_qmake" -lplugin_qmake
              
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              jsulm
              Lifetime Qt Champion
              wrote on 3 Jan 2019, 12:18 last edited by
              #8

              @NIXIN You should check the linker call as you have a space in your path which can cause issues (you should avoid spaces in paths).

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

              N 1 Reply Last reply 3 Jan 2019, 12:21
              0
              • J jsulm
                3 Jan 2019, 12:18

                @NIXIN You should check the linker call as you have a space in your path which can cause issues (you should avoid spaces in paths).

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                NIXIN
                wrote on 3 Jan 2019, 12:21 last edited by
                #9

                @jsulm I tried same thing with this example http://doc.qt.io/qt-5/qtwidgets-tools-plugandpaint-app-example.html and its working fine there

                LIBS += "/home/uidm9805/Qt Projects/plugandpaint/build/plugandpaint/plugins/libpnp_basictools.a"
                

                don't know why this project is behaving in odd manner

                J 1 Reply Last reply 3 Jan 2019, 12:24
                0
                • N NIXIN
                  3 Jan 2019, 12:21

                  @jsulm I tried same thing with this example http://doc.qt.io/qt-5/qtwidgets-tools-plugandpaint-app-example.html and its working fine there

                  LIBS += "/home/uidm9805/Qt Projects/plugandpaint/build/plugandpaint/plugins/libpnp_basictools.a"
                  

                  don't know why this project is behaving in odd manner

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                  jsulm
                  Lifetime Qt Champion
                  wrote on 3 Jan 2019, 12:24 last edited by
                  #10

                  @NIXIN Is your plug-in really located here: /home/uidm9805/Qt Projects/static_plugin_qmake/build/plugin_qmake? And was it build with exact same compiler and Qt version?

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

                  N 1 Reply Last reply 3 Jan 2019, 12:27
                  0
                  • J jsulm
                    3 Jan 2019, 12:24

                    @NIXIN Is your plug-in really located here: /home/uidm9805/Qt Projects/static_plugin_qmake/build/plugin_qmake? And was it build with exact same compiler and Qt version?

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                    NIXIN
                    wrote on 3 Jan 2019, 12:27 last edited by
                    #11

                    @jsulm yes plugin is located in the given path and compiler versions are same

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                      NIXIN
                      wrote on 4 Jan 2019, 09:52 last edited by
                      #12

                      can anybody help me with this issue??

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                        NIXIN
                        wrote on 4 Jan 2019, 10:50 last edited by
                        #13

                        After lot of hit and trial, I got the mistake I was doing

                        Q_IMPORT_PLUGIN(plugin_qmake)
                        

                        this line should have the class name of plugin

                        Q_IMPORT_PLUGIN(PluginQmake)
                        

                        now it works fine....

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                          Ni.Sumi
                          wrote on 4 Jan 2019, 15:09 last edited by
                          #14

                          If it's solved, Please set it to "Solved" from unsolved.

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                          4 Jan 2019, 09:52

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