http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49829
--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-01-20 22:32:24 UTC --- gcc just uses -static-libstdc++, so presumably the easiest would be if in some subdirectory we linked this libstdc++convenience.la into a noinst libstdc++.a.