Any (self-compiled) Qt app crashes.

[Ralf Habacker]

> Application is compile using "qmake" (QMAKESPEC set to win32-g++) and
> "make" (CXXFLAGS set to "-fvtable-thunks", LFLAGS set to
> "-Wl,--enable-auto-import").
>
The only I can see is, that QMAKESPEC should be cygwin-g++ and vtable-thunks
should not be used, because this uses aa different virtual table layout and let
btn->show() crashes.

> Applications coming with Qt package (designer, qtconfig) runs without
> any problem. The application I'm trying to port also crashes at weird
> places, but it must be a more fundamental problem as this little
> test app above crashes as well.
>
see above.

Ralf