I have to apologize for a stupid rookie mistake. The 32-bit builds "did not work" for me because I was trying to open a 64-bit image file in it, which Marcel kindly made we aware of ...
So to correct the above description, I can say:
- cygwin32/cygwin64 for `build.win32x86`: works! - Still, `build.win64x64` is crashing despite applying Nicolas' patch, but this should be discussed in #498.
Because I did not ask a specific question, I'm going to close this now - yahoo, I can finally start developing for the OSVM Windows platform! :tada: