Also my ld doesn't like
-Wl,--large-address-aware

I have no such option in my source tree ?

I have gcc version 4.6.3 (GCC) under ubuntu: are you using mingw64 under MS ?

Yes, I'm using MingW64 under Windows (8 !)

Which exception handling have you used ?
(see http://qt-project.org/wiki/MinGW-64-bit)

SEH, Rubenb build.

Fabrice