@fatso83
Thanks for posting this across! And thanks for leaving my name on it, I was going to do it myself this evening, but you beat me to it.

Unfortunately I no longer have any windows machines available to me to help with any questions (not that I expect too many with such a small patch) so feel free to put your name on the commit if you're in a better position to shepherd it along.

I can confirm that boost/python/detail/wrap_python.hpp still has to be patched to support Boost.Python on Cygwin64 (I'm using Boost 1.60.0).

An alternative patch is wrapping #define SIZEOF_LONG 4 with an #ifndef:

#ifndef SIZEOF_LONG
# define SIZEOF_LONG 4
#endif

This works as Cgwin64 defines SIZEOF_LONG in /usr/include/python2.7/pyconfig.h (which is included by boost/python/detail/wrap_python.hpp).