http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55694
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution| |INVALID --- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-12-14 21:19:03 UTC --- GCC, etc. is correct here you only have a declaration of sto::iscallabel<T,T>::value and no definition of it.