http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55518
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-11-28 17:23:32 UTC --- I still think it is a very bad idea. As I said earlier, there are lots of similar compiler options that require their corresponding runtime libraries, and adding lots of junk to each *.exp just because user might use those options in RUNTESTFLAGS is overkill.