re PR fortran/14568 (should not warn about unused variables in common blocks)

       PR fortran/14568
       * trans-decl.c (generate_local_decl): Don't warn for unused
       variables which are in common blocks.

From-SVN: r81837

gcc/fortran/ChangeLog

+2004-04-22  Tobias Schlter  <tobias.schlueter@physik.uni-muenchen.de>
+
+       PR fortran/14568
+       * trans-decl.c (generate_local_decl): Don't warn for unused
+       variables which are in common blocks. 
+
 2004-05-13  Diego Novillo  <dnovillo@redhat.com>
 
 	* Make-lang.in, f95-lang.c, trans-array.c, trans-decl.c,

gcc/fortran/trans-decl.c

@@ -1855,7 +1855,9 @@ generate_local_decl (gfc_symbol * sym)
           if (warn_unused_parameter)
             warning ("unused parameter `%s'", sym->name);
         }
-      else if (warn_unused_variable)
+      /* warn for unused variables, but not if they're inside a common
+     block.  */
+      else if (warn_unused_variable && !sym->attr.in_common)
         warning ("unused variable `%s'", sym->name);
     }
 }