http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51813
Jason Merrill <jason at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED AssignedTo|unassigned at gcc dot |jason at gcc dot gnu.org |gnu.org | --- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> 2012-01-13 15:57:35 UTC --- The difference is that now for the same input, GCC marks the undefined use_facet symbol as hidden, while 4.6 doesn't. I'll take a look.