http://bugs.winehq.org/show_bug.cgi?id=31501
--- Comment #3 from Henri Verbeet hverbeet@gmail.com 2012-08-21 14:01:55 CDT --- (In reply to comment #2)
-O2 -g has been the default for a while, AFAICT, so debugging symbols are already the default, for self-compiled Wine.
Yes, but this does make it a bit harder to override that default.