[Bug target/42159] unwinding issues on darwin

[ossman at cendio dot se]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42159

--- Comment #32 from Pierre Ossman <ossman at cendio dot se> ---
(In reply to Jack Howarth from comment #31)
> 
> You might check out the original posting on this issue...
> 
> http://lists.cs.uiuc.edu/pipermail/llvmdev/2009-September/025900.html
> 

I believe that was one of the posts we found and what made us look at which
unwind implementation was used.

> IMHO, the static linkage of -lgcc_eh is evil as it potentially breaks the
> requirement that only a single unwinder (always the system one) be used.

I can understand that. But in that case why keep the gcc unwinder on OS X? If
it doesn't work then including it is just an accident waiting to happen. I
would suggest something along the lines of the attached patch.