cp-tree.h (DECL_ANTICIPATED): Don't require a FUNCTION_DECL.

	* cp-tree.h (DECL_ANTICIPATED): Don't require a FUNCTION_DECL.
	* decl.c (select_decl): Don't return declarations that are
	DECL_ANTICIPATED.

From-SVN: r36953

gcc/cp/ChangeLog

+2000-10-19  Mark Mitchell  <mark@codesourcery.com>
+
+	* cp-tree.h (DECL_ANTICIPATED): Don't require a FUNCTION_DECL.
+	* decl.c (select_decl): Don't return declarations that are
+	DECL_ANTICIPATED.
+
 2000-10-18  Mark Mitchell  <mark@codesourcery.com>
 
 	* cp-tree.h (cp_tree_index): Add CPTI_FAKE_STD.

gcc/cp/cp-tree.h

@@ -2481,7 +2481,7 @@ extern int flag_new_for_scope;
 /* Nonzero if NODE is a FUNCTION_DECL for a built-in function, and we have
    not yet seen a prototype for that function.  */
 #define DECL_ANTICIPATED(NODE) \
-  (DECL_LANG_SPECIFIC (FUNCTION_DECL_CHECK (NODE))->decl_flags.anticipated_p)
+  (DECL_LANG_SPECIFIC (DECL_CHECK (NODE))->decl_flags.anticipated_p)
 
 /* Record whether a typedef for type `int' was actually `signed int'.  */
 #define C_TYPEDEF_EXPLICITLY_SIGNED(exp) DECL_LANG_FLAG_1 ((exp))

gcc/cp/decl.c

@@ -5693,6 +5693,15 @@ select_decl (binding, flags)
 {
   tree val;
   val = BINDING_VALUE (binding);
+
+  /* When we implicitly declare some builtin entity, we mark it
+     DECL_ANTICIPATED, so that we know to ignore it until it is
+     really declared.  */
+  if (val && DECL_P (val) 
+      && DECL_LANG_SPECIFIC (val) 
+      && DECL_ANTICIPATED (val))
+    return NULL_TREE;
+
   if (LOOKUP_NAMESPACES_ONLY (flags))
     {
       /* We are not interested in types. */

gcc/testsuite/g++.old-deja/g++.other/std1.C

+// Build don't link:
+// Special g++ Options: -fhonor-std
+// Origin: Mark Mitchell <mark@codesourcery.com>
+
+extern "C" int memcmp (const void * __s1,
+		       const void * __s2,
+		       __SIZE_TYPE__ __n) throw ();
+
+namespace std {
+void f () {
+  memcmp (0, 0, 0);
+}
+};