https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64349
--- Comment #17 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- > Better now? Yes, I have bootstrapped a clean revision r220437 on x86_64-apple-darwin10, regtesting in progress. For the record, I still see the warning ld: warning: can't add line info to anonymous symbol __const@0 from s-arit64.o but no longer Undefined symbols: "_environ", referenced from: ___gnat_environ in env.o ___gnat_clearenv in env.o (maybe you meant: _system__stack_usage__environment_task_analyzer,