@snija, an update on libgomp:
Configuring fails with the error "Pthreads are required to build libgomp". After poking around in the main GCC configure script, I see that compilation of libgomp is automatically disabled on non-POSIX systems for this reason. MinGW32 programs are expected to use Win32 threads directly, though I expect there are pthreads ports for MinGW available. Feel free to build libgomp yourself with one of these ports; or, if you find an easy method of having libgomp use Win32 threads, I'll try it.
Cheers,
John E. / TDM