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
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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1 files changed, 50 insertions, 0 deletions

diff --git a/gcc/ada/a-disedf.ads b/gcc/ada/a-disedf.ads
new file mode 100644
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+++ b/gcc/ada/a-disedf.ads
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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                  A D A . D I S P A T C H I N G . E D F                   --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+-- 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 unit is not implemented in typical GNAT implementations that lie on
+--  top of operating systems, because it is infeasible to implement in such
+--  environments.
+
+--  If a target environment provides appropriate support for this package,
+--  then the Unimplemented_Unit pragma should be removed from this spec and
+--  an appropriate body provided.
+
+with Ada.Real_Time;
+with Ada.Task_Identification;
+
+package Ada.Dispatching.EDF is
+   pragma Preelaborate;
+
+   pragma Unimplemented_Unit;
+
+   subtype Deadline is Ada.Real_Time.Time;
+
+   Default_Deadline : constant Deadline := Ada.Real_Time.Time_Last;
+
+   procedure Set_Deadline
+      (D : Deadline;
+       T : Ada.Task_Identification.Task_Id :=
+             Ada.Task_Identification.Current_Task);
+
+   procedure Delay_Until_And_Set_Deadline
+      (Delay_Until_Time : Ada.Real_Time.Time;
+       Deadline_Offset  : Ada.Real_Time.Time_Span);
+
+   function Get_Deadline
+      (T : Ada.Task_Identification.Task_Id :=
+             Ada.Task_Identification.Current_Task)
+       return Deadline;
+
+end Ada.Dispatching.EDF;