a-calend-vms.adb, [...]: Add a section on leap seconds control along with two entitie...

a-calend-vms.adb, [...]: Add a section on leap seconds control along with two entities used to enable...

2007-09-26  Hristian Kirtchev  <kirtchev@adacore.com>

	* a-calend-vms.adb, a-calend.adb:
	Add a section on leap seconds control along with two entities used to
	enable and disable leap seconds support. The array Leap_Second_Times is
	now constant and contains hard time values pre-generated. Remove
	all elaboration code used to populate the table of leap seconds.

	* bindgen.adb:
	Add entity Leap_Seconds_Support to the list of global run-time variables
	along with a comment on its usage and values.
	(Gen_Adainit_Ada): Add code to generate the declaration and import of
	Integer variable Leap_Seconds_Support. Set its value to zero (disabled)
	or one (enabled) depending on the presence of binder switch "-y".
	(Gen_Adainit_C): Add code to generate the declaration of external int
	__gl_leap_seconds_support. Set is value to zero (disabled) or one
	(enabled) depending on the presence of binder switch "-y".

	* init.c: Add __gl_leap_seconds_support to the list of global values
	computed by the binder.

From-SVN: r128780