http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54117
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-01-08 12:42:06 UTC --- dbxout.c already defines a handle_pch hook, so it is apparently told when pch_init and write_pch are called, so in theory this could be handled in dbxout.c only (still, the question is if other debug backends don't have similar issue).
