* gcc.c (default_compilers, cpp-output): Pass -fpreprocessed.
	* toplev.c (documented_lang_options): Add -fpreprocessed.
	* cpplib.h (struct cpp_buffer): Add preprocessed.
	* cppinit.c (cpp_handle_option): Handle -fpreprocessed.
	(cpp_start_read): Don't expand macros or emit an initial #line
	directive if -fpreprocessed.

	* cpplib.h (struct cpp_buffer): Added manual_pop for
	better C++ tokenization.
	* cpplib.c (cpp_get_token): Return CPP_EOF if manual_pop.
	Also, support C++ tokenization for ->*, .*, <?, and >? operators.
	* c-common.c (cpp_token): Make non-static.

From-SVN: r28190