http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48097
--- Comment #6 from Iain Sandoe <iains at gcc dot gnu.org> 2011-03-18 08:32:39 UTC --- (In reply to comment #5) > That's something that has been fixed in PR26208 by adding S modifier for > signal > frames and introducing _Unwind_GetIPInfo. So, if Apple unwinder has that > function, it is just a matter of making sure signal frames are marked and such > (or MD_FALLBACK_FRAME_STATE_FOR in the unwinder handles it). > If it doesn't have that entry point and you can't switch to a newer unwinder, > you are out of luck. Dawin's (Darwin 8, 9) unwinder is essentially from gcc_s at the time the system was released; Darwin 10's unwinder does the same as Darwin 9. we have _Unwind_GetIPInfo on systems >= Darwin 9.