GitLab

	(c_common_handle_option): Don't handle --help.
	* c.opt: Document some options.
	(--help): Remove.
	* opts.c (print_filtered_help): New.
	(print_help): Use it.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@69383 138bc75d-0d04-0410-961f-82ee72b054a4