Full error message


/home/richel/qtsdk-2010.04/lib/libQtSvg.so.4:: error: undefined reference to 'QGraphicsItemPrivate::height() const'

/home/richel/qtsdk-2010.04/lib/libQtSvg.so.4:: error: undefined reference to 'QListData::detach(int)'

/home/richel/qtsdk-2010.04/lib/libQtSvg.so.4:: error: undefined reference to 'QGraphicsItemPrivate::setWidth(double)'

/home/richel/qtsdk-2010.04/lib/libQtSvg.so.4:: error: undefined reference to 'QGraphicsItemPrivate::width() const'

/home/richel/qtsdk-2010.04/lib/libQtSvg.so.4:: error: undefined reference to 'QGraphicsItemPrivate::setHeight(double)'

/home/richel/qtsdk-2010.04/lib/libQtSvg.so.4:: error: undefined reference to 'QGraphicsItemPrivate::resetHeight()'

/home/richel/qtsdk-2010.04/lib/libQtSvg.so.4:: error: undefined reference to 'QGraphicsItemPrivate::resetWidth()'

/home/richel/qtsdk-2010.04/lib/libQtSvg.so.4:: error: undefined reference to 'QListData::detach_grow(int*, int)'

:: error: collect2: ld returned 1 exit status

Cause

Operating system: Ubuntu 10.04 LTS Lucid Lynx

IDE: Qt Creator 2.0.0

Project type: Console Application

Compiler: G++ 4.4.1

Libraries used:

Qt: version 4.7.0 (32 bit)

Qt project file


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

#

# Project created by QtCreator 2010-07-21T19:21:43

#

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

QT       += core gui

TARGET = CppQwtExample1

TEMPLATE = app

SOURCES += main.cpp

LIBS += -L/usr/local/lib -lqwt-qt4

Source code


#include <QApplication>



#include <qwt-qt4/qwt_plot.h>



int main(int argc, char **argv)

{

  QApplication a(argc, argv);

  QwtPlot plot;

  plot.show();

  return a.exec();

}

Solution

You will additionaly need to link to QtSvg.

Add the following line to the Qt Creator project file:


LIBS += -L/usr/local/lib -lQtSvg

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

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(C++) Undefined reference to 'QGraphicsItemPrivate::height() const'

Full error message

Cause

Qt project file

Source code

Solution