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Thread: linker problem in plugin, undefined reference to `Core::....

  1. 5th March 2012, 23:41 #1
    Bavooo
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    Default linker problem in plugin, undefined reference to `Core::....

    I'm building some plugins for QT Creator, and some are finished, but sometimes I bump in the undefined reference to .. error. I had it when i tried to use something like:

    Qt Code: 
    1. CppEditor::Internal::CPPEditorWidget *testccped = qobject_cast<CppEditor::Internal::CPPEditorWidget *>(textEditor->widget());
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    error:
    Qt Code: 
    1. ./release\extractmethod.o:extractmethod.cpp:(.text+0x3f7): undefined reference to 'CppEditor::Internal::CPPEditorWidget::staticMetaObject'
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    So I didn't found the problem back then, but now I have it again. And it would motivate me if I could fix this.
    So the case now:

    my pro file: (My apologies for the messy pro file, the cleaning part still has to come)
    Qt Code: 
    1. TARGET = RefactoringPlugin
    2. CONFIG += release
    3. TEMPLATE = lib
    4.  
    5. DEFINES += REFACTORINGPLUGIN_LIBRARY
    6.  
    7.  
    8. # RefactoringPlugin files
    9.  
    10. SOURCES += refactoringpluginplugin.cpp \
    11.     methoderenamedialog.cpp \
    12.     dialog.cpp \
    13.     extractmethod.cpp \
    14.     debugdialog.cpp \
    15.     extractmethoddialog.cpp \
    16.     gensetget.cpp
    17.  
    18.  
    19. HEADERS += refactoringpluginplugin.h\
    20.         refactoringplugin_global.h\
    21.         refactoringpluginconstants.h \
    22.     methoderenamedialog.h \
    23.     dialog.h \
    24.     extractmethod.h\
    25.     debugdialog.h \
    26.     extractmethoddialog.h \
    27.     gensetget.h
    28.  
    29.  
    30. OTHER_FILES = RefactoringPlugin.pluginspec
    31.  
    32.  
    33. # Qt Creator linking
    34. QTC_SOURCE_DIR = C:/qt-creator-2.4.1-src
    35. IDE_SOURCE_TREE = $$QTC_SOURCE_DIR
    36. QTC_BUILD_DIR = C:/qtcr24
    37.  
    38. include($$QTC_SOURCE_DIR/src/qtcreatorplugin.pri)
    39. include($$QTC_SOURCE_DIR/src/plugins/coreplugin/coreplugin.pri)
    40. include($$QTC_SOURCE_DIR/src/plugins/texteditor/texteditor.pri)
    41. include($$QTC_SOURCE_DIR/src/plugins/coreplugin/coreplugin.pri)
    42. include($$QTC_SOURCE_DIR/src/plugins/vcsbase/vcsbase.pri)
    43. include($$QTC_SOURCE_DIR/src/libs/utils/utils.pri)
    44. include($$QTC_SOURCE_DIR/src/libs/cplusplus/cplusplus.pri)
    45. include($$QTC_SOURCE_DIR/src/plugins/cppeditor/cppeditor_dependencies.pri)
    46. include($$IDE_SOURCE_TREE/src/plugins/coreplugin/coreplugin.pri )
    47. include($$IDE_SOURCE_TREE/src/plugins/texteditor/texteditor.pri )
    48. include($$QTC_SOURCE_DIR/src/plugins/cppeditor/cppeditor.pri)
    49. include($$QTC_SOURCE_DIR/src/plugins/cpptools/cpptools.pri)
    50. include($$QTC_SOURCE_DIR/src/plugins/locator/locator.pri)
    51.  
    52. LIBS += -LC:/qtcr24/bin \
    53.         -LC:/qtcr24/lib/qtcreator/plugins/Nokia/ \
    54.         -LC:/qtcr24/lib/qtcreator/plugins \
    55.         -LC:/qtcr24/src/plugins/cppeditor/release
    56.  
    57.  
    58.  
    59.  
    60. DESTDIR = $$DEST
    61.  
    62. INCLUDEPATH += $$QTC_SOURCE_DIR/src \
    63.     $$QTC_SOURCE_DIR/src/plugins \
    64.     C:/qt-creator-2.4.1-src/src/plugins/cppeditor \
    65.     $$QTC_SOURCE_DIR/src/plugins/cppeditor \
    66.     $$QTC_SOURCE_DIR/src/plugins/coreplugin/ \
    67.     $$QTC_SOURCE_DIR/src/plugins/coreplugin/editormanager \
    68.     $$QTC_SOURCE_DIR/src/plugins/texteditor/codeassist/ \
    69.     $$QTC_SOURCE_DIR/src/libs \
    70.     $$QTC_SOURCE_DIR/src/libs/cplusplus \
    71.     $$QTC_SOURCE_DIR/src/libs/extensionsystem \
    72.     $$QTC_SOURCE_DIR/src/libs/utils \
    73.     $$QTC_SOURCE_DIR/src/libs/3rdparty \
    74.     $$QTC_SOURCE_DIR/src/libs/3rdparty/cplusplus \
    75.     $$QTC_SOURCE_DIR/src/shared \
    76.     $$QTC_SOURCE_DIR/src/shared/cplusplus
    77.  
    78.  
    79. FORMS += \
    80.     dialog.ui \
    81.     debugdialog.ui \
    82.     extractmethoddialog.ui
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    the problem in the code: (if I comment this, it builds perfect)
    Qt Code: 
    1. void ExtractMethod::dualscr()
    2. {
    3.     Core::Internal::EditorView *w = new Core::Internal::EditorView();
    4.     w->show();
    5. }
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    compile error:
    Qt Code: 
    1. g++ -Wl,-s -mthreads -shared -Wl,--out-implib,release\libRefactoringPlugin.a -o release\RefactoringPlugin.dll object_script.RefactoringPlugin.Release  -L"c:\QtSDK1.2\Desktop\Qt\4.8.0\mingw\lib" -L/lib/qtcreator -L/lib/qtcreator/plugins/Nokia -lAggregation -lExtensionSystem -lBotan -lUtils -lCore -lFind -lQtConcurrent -lLocator -lTextEditor -lProjectExplorer -lVCSBase -lCPlusPlus -lLanguageUtils -lCppTools -lCppEditor -LC:/qtcr24/bin -LC:/qtcr24/lib/qtcreator/plugins/Nokia/ -LC:/qtcr24/lib/qtcreator/plugins -LC:/qtcr24/src/plugins/cppeditor/release -lQtGui4 -lQtCore4 
    2. Creating library file: release\libRefactoringPlugin.a
    3. mingw32-make.exe[1]: Leaving directory `C:/Users/Bavo/thesis/refactoring/refactoringPlugin'
    4. [COLOR="#FF0000"]./release\extractmethod.o:extractmethod.cpp:(.text+0x21): undefined reference to `Core::Internal::EditorView::EditorView(QWidget*)[/COLOR]'
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    I know it's a linker problem but I just can find the problem. Anybody an idea?
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  2. 6th March 2012, 01:51 #2
    ChrisW67
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    Default Re: linker problem in plugin, undefined reference to `Core::....

    You are missing a Q_OBJECT macro in the private section one or more classes would be my guess. Alternatively, you have not run qmake since adding it so moc is not being run over the code and the metaobject stuff is not built.
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  3. 6th March 2012, 10:47 #3
    Bavooo
    Bavooo is offline Beginner
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    Default Re: linker problem in plugin, undefined reference to `Core::....

    Thx for your answer, but the Q_object macro's are there. Just ran qmake again. No difference. Any other ideas?
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