Ok so I made it, I set up the Mingw environment and compiled MESS on a 64 bit Windows 7 using the buildtools package and the instructions found on the Tools page. It worked after a few quirks:
Code
[MINGW64] C:\Users\jolar\work\mame>git checkout didact_r4
fatal: unable to join threaded lstat
I fixed by an additional git config thingie:
Code
git config --replace-all core.preloadIndex false
I also had to set my HOME environment variable before anything worked
Code
set HOME=\Users\jolar
Also the instructions lists two git commands on the same line which will not work.
However, this is soo much easier than my previous two failed attempts to get a Windows environment for MESS/MAME up and running. Thanks a lot for that!:)