The wiki is in the process of moving to Please make your edits there.

Using_Qt_Creator_for_cross compiling_Qt_applications_from_Windows_to_UNIX like_OSs | Qt Wiki | Qt Project

This page will have instructions on how to use Qt Creator for cross-compiling Qt applications from Windows to UNIX-like OSs, for example QNX.

Update: This turns out to be not as simple as it looked at first.

It would rock, if you could document what does not work. Others can help with suggestions then.