http://bugs.winehq.org/show_bug.cgi?id=18787
--- Comment #8 from Matt Lewandowsky matt@greenviolet.net 2011-08-29 00:34:37 CDT --- (In reply to comment #6)
It depends on what you define as "the community". Even illumos is generally built with the closed-source Studio compiler by most developers at this time (and it's required that any patches compile with Studio, even if only tested with GCC by the submitter), as GCC support is still newish.
AFAICR, Studio support has always been for-charge aside from posting to the forum and to blog posts and hoping that you get a response (both of these are relatively recent, even). Indeed, Oracle Studio is licensed about the same as it was under Sun, if not actually slightly more liberally. In fact, they still offer their Betas to the public and still maintain their Linux compiler.
Fortunately or not, Studio's support offerings are about the same now as before Oracle came onto the scene. Arguably, it is even easier to download now than it was via SDLC. I have not seen a mass migration away from Studio any more than there was with Sun's GCC included in Solaris 9 and 10. Even OpenIndiana has Studio in their package repository, most likely due to the fact that most open-source software expects Studio to be available on Solaris.
Porter advice still tends to be "Try to get stuff to work with Studio before doing things with GCC", as far as I've seen. This bug is in that spirit.