http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53843
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution| |INVALID --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-07-03 19:58:06 UTC --- >AFAIK this is not correct behavior. I wouldn't expect the preprocessor behavior And this is the one of the main incompatibilities between C++98 and C++11.