https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69953
DB <db0451 at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |db0451 at gmail dot com --- Comment #30 from DB <db0451 at gmail dot com> --- I get similar issues when compiling glibmm-2.4 from git with g++ 6.3 and LTO, but not without LTO: undefined references to destructors for Glib::RefPtr<Gtk::TreeModel> and Glib::RefPtr<Gtk::Application>. Can this be related, or should I open another bug?