http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51031
--- Comment #16 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2011-11-10 09:51:03 UTC --- On x86_64-apple-darwin10 at revision 181249, the link error is ld: codegen problem, can't use rel32 to external symbol ___emutls_v._ZN3GTM12_gtm_thr_tlsE in __ITM_malloc from .libs/alloc_c.o