http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55534
--- Comment #1 from Harald Anlauf <anlauf at gmx dot de> 2012-12-04 23:02:29 UTC --- It would be nice if somebody could explain how to handle the setting of options. In the meantime, since this warning may generate lots of output, I disabled it: Index: gcc/fortran/scanner.c =================================================================== --- gcc/fortran/scanner.c (revision 194167) +++ gcc/fortran/scanner.c (working copy) @@ -326,7 +326,7 @@ else { /* FIXME: Also support -Wmissing-include-dirs. */ - if (warn) + if (0) gfc_warning_now ("Nonexistent include directory \"%s\"", path); } return;