http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57557
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- It's undefined behaviour, you take a reference ton object that has no definition (i.e. no address) Please read http://gcc.gnu.org/wiki/VerboseDiagnostics#missing_static_const_definition