* opts.h (cl_option_state): New structure.

	* opts.h (cl_option_state): New structure.
	(get_option_state): Declare.
	* opts.c (get_option_state): New function.
	* toplev.c (option_affects_pch_p): New function.
	(default_get_pch_validity): Store the state of all options for which
	option_affects_pch_p returns true.
	(default_pch_valid_p): Check the state of those options here.
	Only check target_flags separately if targetm.check_pch_target_Flags
	is nonnull or if TARGET_SWITCHES is defined.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@100430 138bc75d-0d04-0410-961f-82ee72b054a4