Qt4 Lib -- Linker Problems Qt4/OpenGL

[Jackson.Shredder]

Regardless of what IDE you use, you can use qmake to generate makefiles for your project. To use OpenGL all you need to do is to add QT+=opengl and rerun qmake.

Thanks, I appreciate the response; however, as I mentioned, that produces another problem:

I saw (on this forum, actually, which is why I'm posting here) this thread:
Can't compile custom class derived from QGLWidget

I tried this suggestion and it does indeed build, but I get this when I try to run the applicaion:

X Error: BadRequest (invalid request code or no such operation) 1
  Extension:    143 (Uknown extension)
  Minor opcode: 19 (Unknown request)
  Resource id:  0x17
qt-opengl: xcb_io.c:461: _XRead: Assertion `dpy->xcb->reply_data != 0' failed.
Aborted

X Error: BadRequest (invalid request code or no such operation) 1
  Extension:    143 (Uknown extension)
  Minor opcode: 19 (Unknown request)
  Resource id:  0x17
qt-opengl: xcb_io.c:461: _XRead: Assertion `dpy->xcb->reply_data != 0' failed.
Aborted

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I did run qmake after adding the "QT += opengl" to the .pro file.

After some more digging around on the internet and in forums, I saw that '-opengl' was a ./configure option. I didn't build it with this option initially, so I figured I'd re-install Qt4 and explicitly building it with the "-opengl" option.