http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54304
--- Comment #11 from Marc Glisse <glisse at gcc dot gnu.org> 2012-08-17 21:21:57 UTC --- (In reply to comment #10) > You don't need the -L flags for the in-tree libraries at all as you could just > put, say, "path_to_mpfr/libmpfr.a" on the command line. I understand that > this > might need some major Makefile surgery. That wouldn't be so hard, but it doesn't help for -I. And it seems preferable to handle -I and -L in the same way so they have less chances of disagreeing (which they sadly do here).