http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29131
--- Comment #21 from Jason Merrill <jason at gcc dot gnu.org> 2012-04-26 14:09:14 UTC --- (In reply to comment #20) > glm::vec3 does not seem like a fundamental type. It isn't, but its associated namespace is glm, and your f isn't in glm.