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
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if you have obtained the source via the command 'git clone',
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1 files changed, 136 insertions, 0 deletions

diff --git a/gcc/ada/g-sercom.adb b/gcc/ada/g-sercom.adb
new file mode 100644
index 000000000..a39d4dbbc
--- /dev/null
+++ b/gcc/ada/g-sercom.adb
@@ -0,0 +1,136 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--           G N A T . S E R I A L _ C O M M U N I C A T I O N S            --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--                     Copyright (C) 2007-2008, AdaCore                     --
+--                                                                          --
+-- 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 2,  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.  See the GNU General Public License --
+-- for  more details.  You should have  received  a copy of the GNU General --
+-- Public License  distributed with GNAT;  see file COPYING.  If not, write --
+-- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
+-- Boston, MA 02110-1301, USA.                                              --
+--                                                                          --
+-- As a special exception,  if other files  instantiate  generics from this --
+-- unit, or you link  this unit with other files  to produce an executable, --
+-- this  unit  does not  by itself cause  the resulting  executable  to  be --
+-- covered  by the  GNU  General  Public  License.  This exception does not --
+-- however invalidate  any other reasons why  the executable file  might be --
+-- covered by the  GNU Public License.                                      --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  Default version of this package
+
+with Ada.Streams; use Ada.Streams;
+
+package body GNAT.Serial_Communications is
+
+   pragma Warnings (Off);
+   --  Kill warnings on unreferenced formals
+
+   type Port_Data is new Integer;
+
+   -----------------------
+   -- Local Subprograms --
+   -----------------------
+
+   procedure Unimplemented;
+   pragma No_Return (Unimplemented);
+   --  This procedure raises a Program_Error with an appropriate message
+   --  indicating that an unimplemented feature has been used.
+
+   ----------
+   -- Name --
+   ----------
+
+   function Name (Number : Positive) return Port_Name is
+   begin
+      Unimplemented;
+      return "";
+   end Name;
+
+   ----------
+   -- Open --
+   ----------
+
+   procedure Open
+     (Port : out Serial_Port;
+      Name : Port_Name)
+   is
+   begin
+      Unimplemented;
+   end Open;
+
+   ---------
+   -- Set --
+   ---------
+
+   procedure Set
+     (Port      : Serial_Port;
+      Rate      : Data_Rate        := B9600;
+      Bits      : Data_Bits        := CS8;
+      Stop_Bits : Stop_Bits_Number := One;
+      Parity    : Parity_Check     := None;
+      Block     : Boolean          := True;
+      Timeout   : Duration         := 10.0)
+   is
+   begin
+      Unimplemented;
+   end Set;
+
+   ----------
+   -- Read --
+   ----------
+
+   overriding procedure Read
+     (Port   : in out Serial_Port;
+      Buffer : out Stream_Element_Array;
+      Last   : out Stream_Element_Offset)
+   is
+   begin
+      Unimplemented;
+   end Read;
+
+   -----------
+   -- Write --
+   -----------
+
+   overriding procedure Write
+     (Port   : in out Serial_Port;
+      Buffer : Stream_Element_Array)
+   is
+   begin
+      Unimplemented;
+   end Write;
+
+   -----------
+   -- Close --
+   -----------
+
+   procedure Close (Port : in out Serial_Port) is
+   begin
+      Unimplemented;
+   end Close;
+
+   -------------------
+   -- Unimplemented; --
+   -------------------
+
+   procedure Unimplemented is
+   begin
+      raise Program_Error with "Serial_Communications not implemented";
+   end Unimplemented;
+
+end GNAT.Serial_Communications;