cppinit.c (builtin_array): Update.
* cppinit.c (builtin_array): Update.
(init_builtins): Flag builtins to warn if redefined or
undefined. Define __GXX_WEAK as a normal macro.
* cpplib.c (do_undef): Warn if flagged NODE_WARN.
* cpplib.h (NODE_WARN): New flag.
* cppmacro.c (builtin_macro): Remove handling of __GXX_WEAK__.
Handle __STDC__ as a builtin only on Solaris.
(warn_of_redefinition): Renamed from check_macro_definition.
Reverse sense of test. Always warn if NODE_WARN.
(_cpp_create_definition): Use warn_of_redefinition. Flag
any macro beginning with "__STDC_" to require a mandatory
warning if redefined or undefined.
From-SVN: r40053
diff --git a/gcc/cpplib.h b/gcc/cpplib.h
index 2b7a99d..0993792 100644
--- a/gcc/cpplib.h
+++ b/gcc/cpplib.h
@@ -444,6 +444,7 @@
#define NODE_POISONED (1 << 1) /* Poisoned identifier. */
#define NODE_BUILTIN (1 << 2) /* Builtin macro. */
#define NODE_DIAGNOSTIC (1 << 3) /* Possible diagnostic when lexed. */
+#define NODE_WARN (1 << 4) /* Warn if redefined or undefined. */
/* Different flavors of hash node. */
enum node_type