Index: gcc/testsuite/g++.dg/cpp0x/enum21a.C
===================================================================
--- gcc/testsuite/g++.dg/cpp0x/enum21a.C	(revision 0)
+++ gcc/testsuite/g++.dg/cpp0x/enum21a.C	(revision 0)
@@ -0,0 +1,4 @@
+// { dg-do compile }
+// { dg-options "-pedantic" }
+
+enum x { y, }; // { dg-warning "comma at end of enumerator list" }
Index: gcc/testsuite/g++.dg/cpp0x/enum21b.C
===================================================================
--- gcc/testsuite/g++.dg/cpp0x/enum21b.C	(revision 0)
+++ gcc/testsuite/g++.dg/cpp0x/enum21b.C	(revision 0)
@@ -0,0 +1,4 @@
+// { dg-do compile }
+// { dg-options "-pedantic -std=c++0x" }
+
+enum x { y, };
Index: gcc/cp/parser.c
===================================================================
--- gcc/cp/parser.c	(revision 179711)
+++ gcc/cp/parser.c	(working copy)
@@ -13444,6 +13444,7 @@ cp_parser_elaborated_type_specifier (cp_parser* pa
 
    enum-specifier:
      enum-head { enumerator-list [opt] }
+     enum-head { enumerator-list , } [C++0x]
 
    enum-head:
      enum-key identifier [opt] enum-base [opt]
@@ -13463,6 +13464,8 @@ cp_parser_elaborated_type_specifier (cp_parser* pa
    GNU Extensions:
      enum-key attributes[opt] identifier [opt] enum-base [opt] 
        { enumerator-list [opt] }attributes[opt]
+     enum-key attributes[opt] identifier [opt] enum-base [opt]
+       { enumerator-list, }attributes[opt] [C++0x]
 
    Returns an ENUM_TYPE representing the enumeration, or NULL_TREE
    if the token stream isn't an enum-specifier after all.  */
@@ -13802,8 +13805,9 @@ cp_parser_enumerator_list (cp_parser* parser, tree
       /* If the next token is a `}', there is a trailing comma.  */
       if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE))
 	{
-	  if (!in_system_header)
-	    pedwarn (input_location, OPT_pedantic, "comma at end of enumerator list");
+	  if (cxx_dialect < cxx0x && !in_system_header)
+	    pedwarn (input_location, OPT_pedantic,
+                     "comma at end of enumerator list");
 	  break;
 	}
     }