http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56558
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> 2013-03-07 15:36:02 UTC --- (In reply to comment #5) > So, I'm leaving it to you to determine if these bugs are relevant to 4.6 > (and prior?) in view of the C++ conversion. They're not relevant. We can't go back and fix existing versions now, so even if we fixed 4.6.4 it wouldn't help people with 4.6.1 or 4.5.3 GCC can be built with much older compilers. If it can't be built, then the source will be changed to use a workaround instead of expecting everyone to update to a patched compiler that can build it. There's no point worrying that every little bug in old versions of GCC will cause a future problem.