gcc/ChangeLog:

2014-12-04  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	* diagnostic.c (diagnostic_color_init): New.
	* diagnostic.h: Declare.
	* gcc.c (driver::global_initializations): Use it.
	(driver_handle_option): Handle -fdiagnostics-color_.
	* toplev.c: Do not include diagnostic-color.h.
	(process_options): Do not initialize color diagnostics here.
	* common.opt (fdiagnostics-color=): Add Driver.
	* opts-global.c (init_options_once): Initialize color here.
	* opts.c (common_handle_option): Use diagnostics_color_init.
	* diagnostic-color.h: Fix comment.

From-SVN: r218406