obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
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if you have obtained the source via the command 'git clone',
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1 files changed, 65 insertions, 0 deletions

diff --git a/gcc/ada/a-calari.ads b/gcc/ada/a-calari.ads
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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--              A D A . C A L E N D A R . A R I T H M E T I C               --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--         Copyright (C) 2005-2008, Free Software Foundation, Inc.          --
+--                                                                          --
+-- This specification is derived from the Ada Reference Manual for use with --
+-- GNAT.  In accordance with the copyright of that document, you can freely --
+-- copy and modify this specification,  provided that if you redistribute a --
+-- modified version,  any changes that you have made are clearly indicated. --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package provides arithmetic operations of time values using days
+--  and leap seconds. Ada.Calendar.Arithmetic is defined in the Ada 2005
+--  RM (9.6.1).
+
+package Ada.Calendar.Arithmetic is
+
+   --  Arithmetic on days:
+
+   --  Rough estimate on the number of days over the range of Ada time
+
+   type Day_Count is range
+     -(366 * (1 + Year_Number'Last - Year_Number'First))
+        ..
+     +(366 * (1 + Year_Number'Last - Year_Number'First));
+
+   subtype Leap_Seconds_Count is Integer range -2047 .. 2047;
+   --  Count of leap seconds. Negative leap seconds occur whenever the
+   --  astronomical time is faster than the atomic time or as a result of
+   --  Difference when Left < Right.
+
+   procedure Difference
+     (Left         : Time;
+      Right        : Time;
+      Days         : out Day_Count;
+      Seconds      : out Duration;
+      Leap_Seconds : out Leap_Seconds_Count);
+   --  Returns the difference between Left and Right. Days is the number of
+   --  days of difference, Seconds is the remainder seconds of difference
+   --  excluding leap seconds, and Leap_Seconds is the number of leap seconds.
+   --  If Left < Right, then Seconds <= 0.0, Days <= 0, and Leap_Seconds <= 0,
+   --  otherwise all values are nonnegative. The absolute value of Seconds is
+   --  always less than 86_400.0. For the returned values, if Days = 0, then
+   --  Seconds + Duration (Leap_Seconds) = Calendar."-" (Left, Right)
+
+   function "+" (Left : Time;      Right : Day_Count) return Time;
+   function "+" (Left : Day_Count; Right : Time)      return Time;
+   --  Adds a number of days to a time value. Time_Error is raised if the
+   --  result is not representable as a value of type Time.
+
+   function "-" (Left : Time;      Right : Day_Count) return Time;
+   --  Subtracts a number of days from a time value. Time_Error is raised if
+   --  the result is not representable as a value of type Time.
+
+   function "-" (Left : Time;      Right : Time)      return Day_Count;
+   --  Subtracts two time values, and returns the number of days between them.
+   --  This is the same value that Difference would return in Days.
+
+end Ada.Calendar.Arithmetic;