re PR middle-end/7651 (Define -Wextra strictly in terms of other warning flags)

re PR middle-end/7651 (Define -Wextra strictly in terms of other warning flags)

2007-02-12  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	PR middle-end/7651
	* doc/invoke.texi (Wunused-value): Update description.
	(Wextra): Delete item.
	* opts.c (set_Wextra): Don't use the value of Wextra to set the
	value of Wunused-value.
	* c-typeck.c (c_process_expr_stmt): Don't check extra_warnings.
	(c_finish_stmt_expr): Don't check extra_warnings.
	(emit_side_effect_warnings): The caller is responsible to check
	warn_unused_value.
cp/
	* cp-gimplify.c (gimplify_expr_stmt): Don't check extra_warnings.
	Check warn_unused_value just once.

From-SVN: r121843