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, 59 insertions, 0 deletions

diff --git a/gcc/ada/exp_smem.ads b/gcc/ada/exp_smem.ads
new file mode 100644
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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                             E X P _ S M E M                              --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 1998-2008, 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.  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 COPYING3.  If not, go to --
+-- http://www.gnu.org/licenses for a complete copy of the license.          --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package contains routines involved in the required expansions for
+--  handling shared memory accesses for variables in Shared_Passive packages.
+
+--  See detailed documentation in System.Shared_Storage spec for a full
+--  description of the approach that is taken for handling distributed
+--  shared memory. This expansion unit in the compiler is responsible
+--  for generating the calls to routines in System.Shared_Storage.
+
+with Types; use Types;
+package Exp_Smem is
+
+   procedure Expand_Shared_Passive_Variable (N : Node_Id);
+   --  N is the identifier for a shared passive variable. This routine is
+   --  responsible for determining if this is an assigned to N, or a
+   --  reference to N, and generating the required calls to the shared
+   --  memory read/write procedures.
+
+   procedure Add_Shared_Var_Lock_Procs (N : Node_Id);
+   --  The argument is a protected subprogram call, before it is rewritten
+   --  by Exp_Ch9.Build_Protected_Subprogram_Call. This routine, which is
+   --  called only in the case of an external call to a protected object
+   --  that has Is_Shared_Passive set, deals with installing the required
+   --  global lock calls for this case. It also generates the necessary
+   --  read/write calls for the protected object within the lock region.
+
+   function Make_Shared_Var_Procs (N : Node_Id) return Node_Id;
+   --  N is the node for the declaration of a shared passive variable.
+   --  This procedure constructs an instantiation of
+   --  System.Shared_Storage.Shared_Var_Procs that contains the read and
+   --  assignment procedures for the shared memory variable.
+   --  See System.Shared_Storage for a full description of these procedures
+   --  and how they are used. The last inserted node is returned.
+
+end Exp_Smem;