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, 104 insertions, 0 deletions

diff --git a/gcc/ada/a-sytaco.adb b/gcc/ada/a-sytaco.adb
new file mode 100644
index 000000000..62bced2ad
--- /dev/null
+++ b/gcc/ada/a-sytaco.adb
@@ -0,0 +1,104 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--         A D A . S Y N C H R O N O U S _ T A S K _ C O N T R O L          --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--          Copyright (C) 1992-2009, Free Software Foundation, Inc.         --
+--                                                                          --
+-- GNAT is free software;  you can  redistribute it  and/or modify it under --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
+-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
+--                                                                          --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception,   --
+-- version 3.1, as published by the Free Software Foundation.               --
+--                                                                          --
+-- You should have received a copy of the GNU General Public License and    --
+-- a copy of the GCC Runtime Library Exception along with this program;     --
+-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
+-- <http://www.gnu.org/licenses/>.                                          --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with Ada.Exceptions;
+
+with System.Tasking;
+with System.Task_Primitives.Operations;
+
+package body Ada.Synchronous_Task_Control is
+
+   ----------------
+   -- Initialize --
+   ----------------
+
+   procedure Initialize (S : in out Suspension_Object) is
+   begin
+      System.Task_Primitives.Operations.Initialize (S.SO);
+   end Initialize;
+
+   --------------
+   -- Finalize --
+   --------------
+
+   procedure Finalize (S : in out Suspension_Object) is
+   begin
+      System.Task_Primitives.Operations.Finalize (S.SO);
+   end Finalize;
+
+   -------------------
+   -- Current_State --
+   -------------------
+
+   function Current_State (S : Suspension_Object) return Boolean is
+   begin
+      return System.Task_Primitives.Operations.Current_State (S.SO);
+   end Current_State;
+
+   ---------------
+   -- Set_False --
+   ---------------
+
+   procedure Set_False (S : in out Suspension_Object) is
+   begin
+      System.Task_Primitives.Operations.Set_False (S.SO);
+   end Set_False;
+
+   --------------
+   -- Set_True --
+   --------------
+
+   procedure Set_True (S : in out Suspension_Object) is
+   begin
+      System.Task_Primitives.Operations.Set_True (S.SO);
+   end Set_True;
+
+   ------------------------
+   -- Suspend_Until_True --
+   ------------------------
+
+   procedure Suspend_Until_True (S : in out Suspension_Object) is
+   begin
+      --  This is a potentially blocking (see ARM D.10, par. 10), so that
+      --  if pragma Detect_Blocking is active then Program_Error must be
+      --  raised if this operation is called from a protected action.
+
+      if System.Tasking.Detect_Blocking
+        and then System.Tasking.Self.Common.Protected_Action_Nesting > 0
+      then
+         Ada.Exceptions.Raise_Exception
+           (Program_Error'Identity, "potentially blocking operation");
+      end if;
+
+      System.Task_Primitives.Operations.Suspend_Until_True (S.SO);
+   end Suspend_Until_True;
+
+end Ada.Synchronous_Task_Control;