http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51813
Jason Merrill <jason at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |NEW Component|c++ |libstdc++ --- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> 2012-01-13 16:19:11 UTC --- I see the problem: mbstate_t is hidden, so codecvt is hidden, so use_facet is hidden. This is indeed revealed by the fix for PR 35688. What do we want to do about C library visibility?