http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48097
--- Comment #8 from Jack Howarth <howarth at nitro dot med.uc.edu> 2011-03-18 17:28:19 UTC --- The response to Comments 5 through 7 from the darwin linker developer is... ------------------------------------------------------------------------- Unfortunately, the _sigtramp function in our libSystem.dylib does not have the 'S' letter in its augmentation string. I wrote a bug for that. With that fixed, I'll need to verify our unwinder the properly uses that 'S' flag to change the boundary conditions when search for the applicable FDE. ------------------------------------------------------------------------- So it appears that if this gets fixed, it will likely only be for darwin11.