http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51785
--- Comment #26 from Joseph S. Myers <jsm28 at gcc dot gnu.org> 2012-03-09 22:13:49 UTC --- The __USE_GNU conditional has now been removed from glibc after further discussion on libc-alpha, so the libstdc++ changes can be reverted (probably after 4.7.0).
