http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55937
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2013-01-10 21:47:29 UTC --- I think this is really invalid and the check (autoconf) should be changed instead. What is happening is f is known to be used outside of the program. If f is marked as externally_visible then it would not remove the variable f.
