cppopts.texi (-dU): Document.

[gcc.git] / libcpp / directives.c

diff --git a/libcpp/directives.c b/libcpp/directives.c
index 249a2324ee7d5ba23f3e0d4f617f4a88380f6968..0ca1117c19a56241c946c31f178343e7e789a01d 100644 (file)
--- a/libcpp/directives.c
+++ b/libcpp/directives.c
@@ -559,9 +559,14 @@ do_define (cpp_reader *pfile)
       pfile->state.save_comments =
        ! CPP_OPTION (pfile, discard_comments_in_macro_exp);
 
+      if (pfile->cb.before_define)
+       pfile->cb.before_define (pfile);
+
       if (_cpp_create_definition (pfile, node))
        if (pfile->cb.define)
          pfile->cb.define (pfile, pfile->directive_line, node);
+
+      node->flags &= ~NODE_USED;
     }
 }
 
@@ -573,6 +578,9 @@ do_undef (cpp_reader *pfile)
 
   if (node)
     {
+      if (pfile->cb.before_define)
+       pfile->cb.before_define (pfile);
+
       if (pfile->cb.undef)
        pfile->cb.undef (pfile, pfile->directive_line, node);
 
@@ -603,7 +611,7 @@ undefine_macros (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *h,
   /* Body of _cpp_free_definition inlined here for speed.
      Macros and assertions no longer have anything to free.  */
   h->type = NT_VOID;
-  h->flags &= ~(NODE_POISONED|NODE_BUILTIN|NODE_DISABLED);
+  h->flags &= ~(NODE_POISONED|NODE_BUILTIN|NODE_DISABLED|NODE_USED);
   return 1;
 }
 
@@ -1638,12 +1646,26 @@ do_ifdef (cpp_reader *pfile)
 
   if (! pfile->state.skipping)
     {
-      const cpp_hashnode *node = lex_macro_node (pfile, false);
+      cpp_hashnode *node = lex_macro_node (pfile, false);
 
       if (node)
        {
          skip = node->type != NT_MACRO;
          _cpp_mark_macro_used (node);
+         if (!(node->flags & NODE_USED))
+           {
+             node->flags |= NODE_USED;
+             if (node->type == NT_MACRO)
+               {
+                 if (pfile->cb.used_define)
+                   pfile->cb.used_define (pfile, pfile->directive_line, node);
+               }
+             else
+               {
+                 if (pfile->cb.used_undef)
+                   pfile->cb.used_undef (pfile, pfile->directive_line, node);
+               }
+           }
          check_eol (pfile);
        }
     }
@@ -1656,7 +1678,7 @@ static void
 do_ifndef (cpp_reader *pfile)
 {
   int skip = 1;
-  const cpp_hashnode *node = 0;
+  cpp_hashnode *node = 0;
 
   if (! pfile->state.skipping)
     {
@@ -1666,6 +1688,20 @@ do_ifndef (cpp_reader *pfile)
        {
          skip = node->type == NT_MACRO;
          _cpp_mark_macro_used (node);
+         if (!(node->flags & NODE_USED))
+           {
+             node->flags |= NODE_USED;
+             if (node->type == NT_MACRO)
+               {
+                 if (pfile->cb.used_define)
+                   pfile->cb.used_define (pfile, pfile->directive_line, node);
+               }
+             else
+               {
+                 if (pfile->cb.used_undef)
+                   pfile->cb.used_undef (pfile, pfile->directive_line, node);
+               }
+           }
          check_eol (pfile);
        }
     }
@@ -2145,6 +2181,9 @@ cpp_pop_definition (cpp_reader *pfile, const char *str, cpp_macro *dfn)
   if (node == NULL)
     return;
 
+  if (pfile->cb.before_define)
+    pfile->cb.before_define (pfile);
+
   if (node->type == NT_MACRO)
     {
       if (pfile->cb.undef)