[Bug bootstrap/52569] [4.8 Regression] bootstrap fails on x86_64-apple-darwin10 at revision 185261

[iains at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52569

--- Comment #2 from Iain Sandoe <iains at gcc dot gnu.org> 2012-03-13 08:52:36 UTC ---
(In reply to comment #1)
> Mine.  But I can only guess a fix and not test it.  Basically we now absolutely
> require the GTHREAD_ONCE stuff, please have a try providing it for darwin
> (I can see a manual page for pthread_once at least).
> 
> I see in unwind-dw2-fde-darwin.c:
> 
> /* Carefully don't include gthr.h.  */
> 
> what's that about?  It looks like that hack no longer works with the
> changed condition for using __GTHREAD_MUTEX_INIT_FUNCTION.

apologies, no time to look at this right now...
.. is the content of this thread helpful?
http://gcc.gnu.org/ml/gcc-patches/2012-02/msg00211.html