http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47774
--- Comment #9 from Adam Butcher <dev.lists at jessamine dot co.uk> 2011-03-03 08:40:28 UTC --- Great. That's got rid of the need for the preprocessor hacks to remove constexpr usage from libstdc++ in c++0x mode. A full build of our tree from GCC 4.6 HEAD (including unmodified libstdc++) works fine now.
