[C++ Patch, committed as obvious] Use ATTRIBUTE_UNUSED

[Paolo Carlini]

Hi,

I bootstrapped and committed the below as obvious.

Thanks,
Paolo.

///////////////////

2011-11-04  Paolo Carlini  <paolo.carl...@oracle.com>

        * typeck.c (build_indirect_ref): Use ATTRIBUTE_UNUSED.
        * mangle.c (write_unnamed_type_name): Likewise.

Index: typeck.c
===================================================================
--- typeck.c    (revision 180965)
+++ typeck.c    (working copy)
@@ -2726,7 +2726,7 @@ build_x_indirect_ref (tree expr, ref_operator erro
 
 /* Helper function called from c-common.  */
 tree
-build_indirect_ref (location_t loc __attribute__ ((__unused__)),
+build_indirect_ref (location_t loc ATTRIBUTE_UNUSED,
                    tree ptr, ref_operator errorstring)
 {
   return cp_build_indirect_ref (ptr, errorstring, tf_warning_or_error);
Index: mangle.c
===================================================================
--- mangle.c    (revision 180965)
+++ mangle.c    (working copy)
@@ -1339,7 +1339,7 @@ nested_anon_class_index (tree type)
 /* <unnamed-type-name> ::= Ut [ <nonnegative number> ] _ */
 
 static void
-write_unnamed_type_name (const tree type __attribute__ ((__unused__)))
+write_unnamed_type_name (const tree type ATTRIBUTE_UNUSED)
 {
   int discriminator;
   MANGLE_TRACE_TREE ("unnamed-type-name", type);