Full error message


/MyFolder/main.o:: In function 'MyDialog':

/MyFolder/main.cpp:4: error: undefined reference to 'vtable for MyDialog'

/MyFolder/main.o:: In function '~MyDialog':

/MyFolder/main.cpp:4: error: undefined reference to 'vtable for MyDialog'

collect2: ld returned 1 exit status

Technical facts

Application type(s)

Desktop application

Operating system(s) or programming environment(s)

Ubuntu 10.10 (maverick)

IDE(s):

Qt Creator 2.0.0

Project type:

Console application

Compiler(s):

G++ 4.4.5

Libraries used:

Qt: version 4.7.0 (32 bit)
STL: GNU ISO C++ Library, version 4.4.5

Qt project file: CppLinkErrorUndefinedReferenceToVtableForMyDialog.pro


#-------------------------------------------------

#

# Project created by QtCreator 2010-12-29T14:26:41

#

#-------------------------------------------------

QT       += core

QT       -= gui

TARGET = CppLinkErrorUndefinedReferenceToVtableForMyDialog

CONFIG   += console

CONFIG   -= app_bundle

TEMPLATE = app

SOURCES += main.cpp

main.cpp


#include <QObject>



class MyDialog : public QObject

{

  Q_OBJECT



  public slots:

    void onSomething() { }

};



int main()

{

  MyDialog dialog;

}

Solution

Seperate the MyDialog class in a header (.h) file and an implementation (.cpp) file.

Go back to Richel Bilderbeek's C++ page.

Go back to Richel Bilderbeek's homepage.

(C++) undefined reference to 'vtable for MyDialog'

Full error message

Technical facts

Qt project file: CppLinkErrorUndefinedReferenceToVtableForMyDialog.pro

main.cpp

Solution