[Bug c/20459] New: Warning for variables that are set but not used

["kazu at cs dot umass dot edu" <gcc-bugzilla at gcc dot gnu dot org>]

Consider:

void
foo (void)
{
  int a;
  a = 5;
}

Note that 'a' is set but not used.

It would be nice if GCC can issue a warning for this.

-- 
           Summary: Warning for variables that are set but not used
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kazu at cs dot umass dot edu
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20459