http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46513
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2010-11-17 00:53:47 UTC --- The maintainers of GNU libc, the C and C++ committees and the POSIX working group have not seen fit to include those functions, and they're not available on my GNU/Linux box.
