* c-ppoutput.c (cb_used_define): Do nothing for a builtin node.

From-SVN: r140604

gcc/ChangeLog

+2008-09-23  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* c-ppoutput.c (cb_used_define): Do nothing for a builtin node.
+
 2008-09-23  Aldy Hernandez  <aldyh@redhat.com>
 
 	* c-tree.h: Add argument to c_objc_common_truthvalue_conversion,

gcc/c-ppoutput.c

@@ -406,6 +406,8 @@ cb_used_define (cpp_reader *pfile, source_location line ATTRIBUTE_UNUSED,
 		cpp_hashnode *node)
 {
   macro_queue *q;
+  if (node->flags & NODE_BUILTIN)
+    return;
   q = XNEW (macro_queue);
   q->macro = xstrdup ((const char *) cpp_macro_definition (pfile, node));
   q->next = define_queue;

gcc/testsuite/ChangeLog

+2008-09-23  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gcc.dg/cpp/cmdlne-dU-23.c: New test.
+
 2008-09-23  Aldy Hernandez  <aldyh@redhat.com>
 
 	* gcc.dg/Walways-true-1.c: Test column numbers.

gcc/testsuite/gcc.dg/cpp/cmdlne-dU-23.c

+/* { dg-do preprocess } */
+/* { dg-options "-P -dU" } */
+/* { dg-final { scan-file-not cmdlne-dU-23.i "__FILE__" } } */
+#ifdef __FILE__
+#endif