Howdy,
Out of curiosity, I've been testing compiling Wine on Sparc. I've sent a few patches to fix a few problems that have crept up over the years. There are two big bugs left though: http://bugs.winehq.org/show_bug.cgi?id=24050 and http://bugs.winehq.org/show_bug.cgi?id=24142
The first blocks running wine, the second blocks building it. For the second, however, I found an old patch: http://www.mail-archive.com/wine-devel@winehq.org/msg23307.html
and rediffed it to current wine. With it, wine mostly compiles (mshtml gets a 'Bus error' when compiling, but no gcc warning/error). I'm not sure if the patch is correct, and I've contacted Eric to ask him to submit the patch, but didn't receive a reply. If it's correct, I'll send it in, with his name on it.
So, those of you who know winebuild (or better yet, Sparc), would you please check the attached patch.
Thanks! -Austin