http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54686
--- Comment #39 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-10-05 17:02:34 UTC --- Probably a plain pasto of mine dating back to when was copying stuff from tr1/* in namespace std::tr1 to std:: protected by __GXX_EXPERIMENTAL_CXX0X__. Looks like I didn't notice that in this specific case the std version of the facilities exists in C++98 mode too (as a GNU C99 extension). Eh ;)