http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50724
Ethan Tira-Thompson <ejtttje at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |REOPENED Resolution|DUPLICATE | --- Comment #22 from Ethan Tira-Thompson <ejtttje at gmail dot com> 2011-10-17 16:46:27 UTC --- Paolo: thanks for the quick reply, but it would help if you could explain why that is the case? Also, a follow-up, is __builtin_isnan and friends used anywhere except cmath? It appears not, other than tr1/special_function_util.h, which is also providing an __isnan.