http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50779
--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-10-19 10:23:37 UTC --- So it's probably similar to ELF platforms using a weak always-inline function. Thus a conflict in marking it replacable at link-time and inlinable. If dllexport does not have this semantic then there is something to be fixed, otherwise not.