Revision 598869

2007-11-27  Martin Sebor  <sebor@roguewave.com>

	Merged rev 594730 from trunk with the implementation of STDCXX-623.

	* util/target.h (target_status): Changed the type of user, system, and
	wall clock time counters from clock_t* to plain clock_t and renamed to
	usr_time, sys_time, and wall_time, respectively.
	* util/exec.cpp (calculate_usage, exec_file): Eliminated static locals
	and instead directly used the target_status object passed in by caller.
	(exec_file): 
	* util/display.cpp (print_status_plain, print_status_verbose): Checked
	for times equal to -1 as an indicator of validity.
	(print_footer_plain): Printed cumulative times for all targets.
	* util/runall.cpp (run_target): Accumulated target times.