[vtkusers] Problems with compiling vtk on Mac with Qt support

[clinton at elemtech.com]

> Hi all,
> I installed the Open Source Qt version and tried to build the latest
> version of VTK with support for Qt.
>
> However, towards the end of the build it fails with the following error:
>
> /Users/anja/development/vtk-5/GUISupport/Qt/Q4VTKWidgetPlugin.h:56: Error:
> Undefined interface
> make[2]: *** [GUISupport/Qt/moc_Q4VTKWidgetPlugin.cxx] Error 1
> make[1]: *** [GUISupport/Qt/CMakeFiles/QVTKWidgetPlugin.dir/all] Error 2
> make: *** [all] Error 2
>
> It seems to barf at the QT macro declaration
> Q_INTERFACES(QDesignerCustomWidgetCollectionInterface)
>
> I am using Mac OSX 10.5.1 and using Qt open source version 4.3.3.
>
> Is there something that has changed? I remember not having problems with an
> earlier Qt and VTK 5.0?
>

Can you check that your QT_QTDESIGNER_INCLUDE_DIR variable is set correctly in 
CMake?  "Undefined interface" can come from not having that set correctly.

Did you configure your build of Qt with -no-framework?

Clint