PR preprocessor/6517

	PR preprocessor/6517
	* Makefile.in: Update.
	* c-common.c (c_common_post_options): Add preprocessor
	errors to the error count.
	* c-lang.c (c_post_options): Kill.
	(LANG_HOOKS_POST_OPTIONS): Use c_common_post_options.
	* hooks.h: Add header guards.
	* langhooks-def.h: Include hooks.h.
	(LANG_HOOKS_POST_OPTIONS): Update.
	* langhooks.h (struct lang_hooks): Update post_options.
	* toplev.c (parse_options_and_default_flags): Update.
cp:
	* cp-lang.c (LANG_HOOKS_POST_OPTIONS): Use c_common_post_options.
	* cp-tree.h (cxx_post_options): Kill.
	* cp-lex.c (cxx_post_options): Kill.
objc:
	* objc-lang.c (objc_post_options): Kill.
	(LANG_HOOKS_POST_OPTIONS): Use c_common_post_options.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@53724 138bc75d-0d04-0410-961f-82ee72b054a4