Full error message


/MyFolder/main.cpp:9: undefined reference to 'QGraphicsScene::QGraphicsScene(QObject*)'

/MyFolder/main.cpp:5: undefined reference to 'QGraphicsScene::~QGraphicsScene()'

Cause

IDE: Qt Creator 1.3.1

Compiler: G++ 4.4.1

Project type: Qt4 Console Application

Selected required modules: QtCore


#include <QtGui/QGraphicsScene>



int main()

{

  QGraphicsScene scene;

}

Solution

As the link error indicates, QGraphicsScene is included but not added to project. The project file might look like this:


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

#

# Project created by QtCreator 2010-04-30T13:50:36

#

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



QT       -= gui



TARGET = CppQtHelloWorldWindowed

CONFIG   += console

CONFIG   -= app_bundle



TEMPLATE = app



SOURCES += main.cpp

If you want to work with QGraphicsScene you will need to add QtGui to your project in the select required modules dialog in the project creation wizard. One (correct or incorrect?) way to remove it is by changing the project file to:


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

#

# Project created by QtCreator 2010-04-30T13:50:36

#

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



TARGET = CppQtHelloWorldWindowed

CONFIG   += console

CONFIG   -= app_bundle



TEMPLATE = app



SOURCES += main.cpp

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

Go back to Richel Bilderbeek's homepage.

(C++) Undefined reference to 'QGraphicsScene::QGraphicsScene(QObject*)'

Full error message

Cause

Solution