http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47662
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-02-10 10:05:26 UTC --- BTW, it would be good to have testcases covering all headers compiled with -fno-operator-names to make sure it doesn't reappear. Perhaps with turning off PCH first. So something like: // { dg-do compile } // { dg-options "-fno-operator-names" } // Avoid using PCH #include <cerrno> #include <bits/stdc++.h> #include <bits/stdtr1c++.h> #include <bits/extc++.h> int or, xor, and; (and similarly with -std=gnu++0x -fno-operator-names).