http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55406
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution| |INVALID --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-11-20 01:51:39 UTC --- Undefined at compile time rather than undefined at runtime. Anyways GCC is correct. BOOST_PP_IS_EMPTY is broken plain and simple, report this to boost instead.