diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 11d2c281c27..5977a8dd080 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,8 @@
 2002-09-12  Jason Merrill  <jason@redhat.com>
 
+	* diagnostic.c (output_add_identifier): New fn.
+	* diagnostic.h: Declare it.
+
 	* calls.c (store_one_arg): Use size_in_bytes to determine the
 	amount of space to push.
 
diff --git a/gcc/diagnostic.c b/gcc/diagnostic.c
index bd115a821b5..3828d5e5588 100644
--- a/gcc/diagnostic.c
+++ b/gcc/diagnostic.c
@@ -463,6 +463,16 @@ output_add_string (buffer, str)
   maybe_wrap_text (buffer, str, str + (str ? strlen (str) : 0));
 }
 
+/* Append an identifier ID to BUFFER.  */
+void
+output_add_identifier (buffer, id)
+     output_buffer *buffer;
+     tree id;
+{
+  output_append (buffer, IDENTIFIER_POINTER (id),
+		 IDENTIFIER_POINTER (id) + IDENTIFIER_LENGTH (id));
+}
+
 /* Flush the content of BUFFER onto the attached stream,
    and reinitialize.  */
 
diff --git a/gcc/diagnostic.h b/gcc/diagnostic.h
index 4835a7a0e44..ff247681592 100644
--- a/gcc/diagnostic.h
+++ b/gcc/diagnostic.h
@@ -316,6 +316,7 @@ extern void output_add_character	PARAMS ((output_buffer *, int));
 extern void output_decimal		PARAMS ((output_buffer *, int));
 extern void output_add_string		PARAMS ((output_buffer *,
 						 const char *));
+extern void output_add_identifier	PARAMS ((output_buffer *, tree));
 extern const char *output_finalize_message PARAMS ((output_buffer *));
 extern void output_clear_message_text	PARAMS ((output_buffer *));
 extern void output_printf		PARAMS ((output_buffer *, const char *,