[vtkusers] undefined reference to 'QVTKWidget::QVTKWidget'

[Yifei Li]

Hi all,

I gave up using qmake and switched to cmake. However, when trying to 
compile the example /GUI/Qt/SimpleView, I still got the following error 
after typing 'cmake .':

CMake Error: Error in cmake code at
/home/grad/yifli/workspace/SimpleView/CMakeLists.txt:7:
INCLUDE Could not find include file: /usr/bin/usr/lib/vtk-5.0/UseVTK.cmake
Current CMake stack:
[1]    /home/grad/yifli/workspace/SimpleView/CMakeLists.txt
-- Configuring done

I checked the file /usr/lib/vtk-5.0/UseVTK.cmake is indeed there, I have 
no idea where the prefix '/usr/bin' comes from. How do I get rid of it?
This is the first time I use cmake,  so could someone help me out? Thanks

Yifei

Yifei Li wrote:
> The undefined reference error occurred in ui_vtkgui.h (qvtkwidget = new QVTKWidget(someParentWidget)), which is automatically generated by qt/eclipse integration.
> The other function qvtkwidget->GetRenderWindow() does not cause any linking error.
>
> If I remove -lQVTK from 'LIBS', I'll get another linking error:
> undefined reference to 'QVTKWidget::GetRenderWindow()'
>
> So I think the dynamic library libQVTK.so must be linked, at least partially.  I checked the symbols defined in libVTK.so using 'nm' command and confirmed myself 'QVTKWidget' is
> indeed defined:
>
> 0000b4d0 T _ZN10QVTKWidgetD0Ev
> 0000b560 T _ZN10QVTKWidgetD1Ev
> 0000b5e0 T _ZN10QVTKWidgetD2Ev
> 00015a40 V _ZTI10QVTKWidget
> 00012034 V _ZTS10QVTKWidget
> 00015800 V _ZTV10QVTKWidget
> 0000b4c0 T _ZThn40_N10QVTKWidgetD0Ev
> 0000b550 T _ZThn40_N10QVTKWidgetD1Ev
>
> I'm running out of ideas. Who can help?
>
> Yifei
>
>
> ----- Original Message -----
> From: "Yifei Li" <yifli at mtu.edu>
> To: vtkusers at vtk.org
> Sent: Friday, March 20, 2009 3:02:55 PM GMT -05:00 US/Canada Eastern
> Subject: [vtkusers] undefined reference to 'QVTKWidget::QVTKWidget'
>
> Hi all,
>
> I'm trying to compile an example of Qt4 and VTK integration - 
> SimpleView.  Although I included all the libraries (I use qmake):
> LIBS += -L/usr/lib \
>            -lQVTK \
>         -lvtkHybrid \
>         -lvtkVolumeRendering \
>         -lvtkIO \
>         -lvtkRendering \
>         -lvtkGenericFiltering \
>         -lvtkGraphics \
>         -lvtkImaging \
>         -lvtkFiltering \
>         -lvtkCommon \
>         -lvtkftgl \
>         -lvtkDICOMParser \
>         -lvtksys
>
> compilation still failed with the error message:
> debug/vtkgui.o: In function `Ui_MainWindow::setupUi(QMainWindow*)': 
> undefined reference to `QVTKWidget::QVTKWidget(QWidget*, 
> QFlags<Qt::WindowType>)'
>
> Any Ideas? Thanks in advance
>
> Yifei
>
> P.S. Development Environment:
> OS: Fedora 9
> IDE: Eclipse 3.3.2
> Compiler: g++ 4.3
> Qt: 4.3
> Qt/Eclipse integration for qt-4.5.0
> VTK: 5.0
>
>
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