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',
however, do note that line-endings of files in your working
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1 files changed, 128 insertions, 0 deletions

diff --git a/gcc/ada/s-imgenu.adb b/gcc/ada/s-imgenu.adb
new file mode 100644
index 000000000..99c6acfa9
--- /dev/null
+++ b/gcc/ada/s-imgenu.adb
@@ -0,0 +1,128 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                      S Y S T E M . I M G _ E N U M                       --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--          Copyright (C) 2000-2009, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+pragma Compiler_Unit;
+
+with Ada.Unchecked_Conversion;
+
+package body System.Img_Enum is
+
+   -------------------------
+   -- Image_Enumeration_8 --
+   -------------------------
+
+   function Image_Enumeration_8
+     (Pos     : Natural;
+      Names   : String;
+      Indexes : System.Address)
+      return    String
+   is
+      type Natural_8 is range 0 .. 2 ** 7 - 1;
+      type Index_Table is array (Natural) of Natural_8;
+      type Index_Table_Ptr is access Index_Table;
+
+      function To_Index_Table_Ptr is
+        new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
+
+      IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
+
+      Start : constant Natural := Natural (IndexesT (Pos));
+      Next  : constant Natural := Natural (IndexesT (Pos + 1));
+
+      subtype Result_Type is String (1 .. Next - Start);
+      --  We need this result type to force the result to have the
+      --  required lower bound of 1, rather than the slice bounds.
+
+   begin
+      return Result_Type (Names (Start .. Next - 1));
+   end Image_Enumeration_8;
+
+   --------------------------
+   -- Image_Enumeration_16 --
+   --------------------------
+
+   function Image_Enumeration_16
+     (Pos     : Natural;
+      Names   : String;
+      Indexes : System.Address)
+      return    String
+   is
+      type Natural_16 is range 0 .. 2 ** 15 - 1;
+      type Index_Table is array (Natural) of Natural_16;
+      type Index_Table_Ptr is access Index_Table;
+
+      function To_Index_Table_Ptr is
+        new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
+
+      IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
+
+      Start : constant Natural := Natural (IndexesT (Pos));
+      Next  : constant Natural := Natural (IndexesT (Pos + 1));
+
+      subtype Result_Type is String (1 .. Next - Start);
+      --  We need this result type to force the result to have the
+      --  required lower bound of 1, rather than the slice bounds.
+
+   begin
+      return Result_Type (Names (Start .. Next - 1));
+   end Image_Enumeration_16;
+
+   --------------------------
+   -- Image_Enumeration_32 --
+   --------------------------
+
+   function Image_Enumeration_32
+     (Pos     : Natural;
+      Names   : String;
+      Indexes : System.Address)
+      return    String
+   is
+      type Natural_32 is range 0 .. 2 ** 31 - 1;
+      type Index_Table is array (Natural) of Natural_32;
+      type Index_Table_Ptr is access Index_Table;
+
+      function To_Index_Table_Ptr is
+        new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
+
+      IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
+
+      Start : constant Natural := Natural (IndexesT (Pos));
+      Next  : constant Natural := Natural (IndexesT (Pos + 1));
+
+      subtype Result_Type is String (1 .. Next - Start);
+      --  We need this result type to force the result to have the
+      --  required lower bound of 1, rather than the slice bounds.
+
+   begin
+      return Result_Type (Names (Start .. Next - 1));
+   end Image_Enumeration_32;
+
+end System.Img_Enum;