I think that I have found a trick to allow compilation with MSYS, I will contribute it when ready, and CC to Eli.
> From: email@example.com > To: firstname.lastname@example.org > CC: email@example.com > Subject: Re: [cedet-semantic] Latest CEDET on BZR does not compile with emacs 24.1 > Date: Mon, 1 Oct 2012 17:21:51 +0200 > > Vincent Bela´che writes: > > Thanks for the feedback, I will see if I can make some hack to overload > > expand-file-name so that MSYS paths are interpreted correctly, and let you > > know. > > Good luck, but may I suggest again that you just ask on emacs-help? > People like Eli read there who happen to know this MSYS business inside > out. > > -David