Makefile.in (cppexp.o): Depend on cpphash.h.

	* Makefile.in (cppexp.o): Depend on cpphash.h.
	* cppexp.c (cpp_lex): Handle `defined (xxx)' for poisoned xxx.
	Include cpphash.h.
	* cpphash.c (special_symbol): Handle plain `xxx' for poisoned xxx.
	* cpplib.c (do_define): Generalise to handle poisoned definitions,
	redefining poisoned identifiers, etc.
	(do_undef): Don't allow poisoned identifiers to be undefined.
	(do_pragma): Add #pragma poison.
	(do_xifdef): Handle `#ifdef xxx' for poisoned xxx.

	* cccp.c: Add T_POISON node type.
	(special_symbol): Handle `defined(xxx)' and plain `xxx' for
	poisoned xxx.
	(do_define): Generalise to handle poisoned definitions,
	redefining poisoned identifiers, etc.
	(do_undef): Don't allow poisoned identifiers to be undefined.
	(do_pragma): Add #pragma poison.
	(do_xifdef): Handle `#ifdef xxx' for poisoned xxx.

	* c-pragma.c (handle_pragma_token): Ignore #pragma poison.
	* c-pragma.h: Add ps_poison state.  We now always have generic
	pragmas.

From-SVN: r29224

1 files changed, 1 insertions, 0 deletions

diff --git a/gcc/cpplib.h b/gcc/cpplib.h
index 619645f..daff0c6 100644
--- a/gcc/cpplib.h
+++ b/gcc/cpplib.h
@@ -600,6 +600,7 @@ enum node_type {
  T_MACRO,	/* macro defined by `#define' */
  T_DISABLED,	/* macro temporarily turned off for rescan */
  T_PCSTRING,	/* precompiled string (hashval is KEYDEF *) */
+ T_POISON,	/* defined with `#pragma poison' */
  T_UNUSED	/* Used for something not defined.  */
  };