http://bugs.winehq.org/show_bug.cgi?id=18832
--- Comment #2 from Scott Ritchie scott@open-vote.org 2009-06-07 21:51:03 --- If I add -fprofile-generate to LDFLAGS (as well as CFLAGS) then the hidden symbol errors go away (a similar thing happens when I manually add -shared to the cflags of the makefiles for these parts).
The gcov errors remain, however. It also looks like Mozilla is having the same issue: https://bugzilla.mozilla.org/show_bug.cgi?id=418866