Hi, Last time I built gmp on Cygwin for Windows it was using gcc-3.4.5 - and was, I think, done as a cross-compilation involving the -mno-cygwin option. Am I right in thinking that the days of "-mno-cygwin" have now passed ? If I want to build (say) gmp on Cygwin for Windows, do I still need to do it as a cross-compilation using Cygwin's gcc-4.x.x compiler ? ... or is there a way to use Cygwin's mingw-w64 port of gcc instead ? Cheers, Rob -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple