This cross-compile environment is for PE/COFF NetBSD/i386, and
it is based on gcc-2.95.2 + the x86-win32 patch.

The preprocessor predefines following symbols:
 * i386 _X86
 * __PEACE__
 * __CYGWIN32__
 * __NetBSD__ __PECOFF__ __NetBSDPE__ (if -mwindows is not specified)
 * _WIN32 WINNT (if -mwindows is specified)

The compiler is capable of anonymous unions/structs.