gcc:

	* doc/cppopts.texi (-dU): Document.
	* c-common.h (flag_dump_macros): Update comment.
	* c-opts.c (handle_OPT_d): Handle -dU.
	* c-ppoutput.c (macro_queue, define_queue, undef_queue,
	dump_queued_macros, cb_used_define, cb_used_undef): New.
	(init_pp_output): Handle -dU.
	(cb_line_change): Call dump_queued_macros.
	* toplev.c (decode_d_option): Accept -dU as preprocessor option.

gcc/testsuite:
	* gcc.dg/cpp/cmdlne-dU-1.c, gcc.dg/cpp/cmdlne-dU-2.c,
	gcc.dg/cpp/cmdlne-dU-3.c, gcc.dg/cpp/cmdlne-dU-4.c,
	gcc.dg/cpp/cmdlne-dU-5.c, gcc.dg/cpp/cmdlne-dU-6.c,
	gcc.dg/cpp/cmdlne-dU-7.c, gcc.dg/cpp/cmdlne-dU-8.c,
	gcc.dg/cpp/cmdlne-dU-9.c, gcc.dg/cpp/cmdlne-dU-10.c,
	gcc.dg/cpp/cmdlne-dU-11.c, gcc.dg/cpp/cmdlne-dU-12.c,
	gcc.dg/cpp/cmdlne-dU-13.c, gcc.dg/cpp/cmdlne-dU-14.c,
	gcc.dg/cpp/cmdlne-dU-15.c, gcc.dg/cpp/cmdlne-dU-16.c,
	gcc.dg/cpp/cmdlne-dU-17.c, gcc.dg/cpp/cmdlne-dU-18.c,
	gcc.dg/cpp/cmdlne-dU-19.c, gcc.dg/cpp/cmdlne-dU-20.c,
	gcc.dg/cpp/cmdlne-dU-21.c, gcc.dg/cpp/cmdlne-dU-22.c: New tests.

libcpp:
	* include/cpplib.h (struct cpp_callbacks): Add used_define,
	used_undef and before_define.
	(NODE_USED): Define.
	* directives.c (do_define, do_undef, undefine_macros, do_ifdef,
	do_ifndef, cpp_pop_definition): Handle new flag and use new
	callbacks.
	* expr.c (parse_defined): Handle new flag and use new callbacks.
	* macro.c (enter_macro_context, _cpp_free_definition): Handle new
	flag and use new callbacks.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@133847 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 15 insertions, 1 deletions

diff --git a/libcpp/macro.c b/libcpp/macro.c
index fd624b10110..587b94814cc 100644
--- a/libcpp/macro.c
+++ b/libcpp/macro.c
@@ -815,6 +815,13 @@ enter_macro_context (cpp_reader *pfile, cpp_hashnode *node,
 
   pfile->state.angled_headers = false;
 
+  if ((node->flags & NODE_BUILTIN) && !(node->flags & NODE_USED))
+    {
+      node->flags |= NODE_USED;
+      if (pfile->cb.used_define)
+	pfile->cb.used_define (pfile, pfile->directive_line, node);
+    }
+
   /* Handle standard macros.  */
   if (! (node->flags & NODE_BUILTIN))
     {
@@ -854,6 +861,13 @@ enter_macro_context (cpp_reader *pfile, cpp_hashnode *node,
       /* Disable the macro within its expansion.  */
       node->flags |= NODE_DISABLED;
 
+      if (!(node->flags & NODE_USED))
+	{
+	  node->flags |= NODE_USED;
+	  if (pfile->cb.used_define)
+	    pfile->cb.used_define (pfile, pfile->directive_line, node);
+	}
+
       macro->used = 1;
 
       if (macro->paramc == 0)
@@ -1393,7 +1407,7 @@ _cpp_free_definition (cpp_hashnode *h)
   /* Macros and assertions no longer have anything to free.  */
   h->type = NT_VOID;
   /* Clear builtin flag in case of redefinition.  */
-  h->flags &= ~(NODE_BUILTIN | NODE_DISABLED);
+  h->flags &= ~(NODE_BUILTIN | NODE_DISABLED | NODE_USED);
 }
 
 /* Save parameter NODE to the parameter list of macro MACRO.  Returns