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, 39 insertions, 0 deletions

diff --git a/gcc/ada/a-diroro.ads b/gcc/ada/a-diroro.ads
new file mode 100644
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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--          A D A . D I S P A T C H I N G . R O U N D _ R O B I N           --
+--                                                                          --
+--                                 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. --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with System;
+with Ada.Real_Time;
+
+package Ada.Dispatching.Round_Robin is
+
+   pragma Unimplemented_Unit;
+
+   Default_Quantum : constant Ada.Real_Time.Time_Span :=
+                       Ada.Real_Time.Milliseconds (10);
+
+   procedure Set_Quantum
+     (Pri     : System.Priority;
+      Quantum : Ada.Real_Time.Time_Span);
+
+   procedure Set_Quantum
+     (Low, High : System.Priority;
+      Quantum   : Ada.Real_Time.Time_Span);
+
+   function Actual_Quantum
+     (Pri : System.Priority) return Ada.Real_Time.Time_Span;
+
+   function Is_Round_Robin (Pri : System.Priority) return Boolean;
+
+end Ada.Dispatching.Round_Robin;