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, 179 insertions, 0 deletions

diff --git a/gcc/ada/xref_lib.ads b/gcc/ada/xref_lib.ads
new file mode 100644
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+++ b/gcc/ada/xref_lib.ads
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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                              X R E F _ L I B                             --
+--                                                                          --
+--                                 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  Miscellaneous utilities for the cross-referencing tool
+
+with Hostparm;
+with Xr_Tabls;  use Xr_Tabls;
+
+with GNAT.Directory_Operations; use GNAT.Directory_Operations;
+with GNAT.OS_Lib;               use GNAT.OS_Lib;
+with GNAT.Dynamic_Tables;
+with GNAT.Regexp;               use GNAT.Regexp;
+
+package Xref_Lib is
+
+   subtype File_Name_String is String (1 .. Hostparm.Max_Name_Length);
+   subtype Line_String      is String (1 .. Hostparm.Max_Line_Length);
+
+   type ALI_File is limited private;
+
+   ---------------------
+   -- Directory Input --
+   ---------------------
+
+   type Rec_DIR is limited private;
+   --  This one is used for recursive search of .ali files
+
+   procedure Find_ALI_Files;
+   --  Find all the ali files that we will have to parse, and have them to
+   --  the file list
+
+   ---------------------
+   -- Search patterns --
+   ---------------------
+
+   type Search_Pattern is private;
+   type Search_Pattern_Ptr is access all Search_Pattern;
+
+   procedure Add_Entity
+     (Pattern : in out Search_Pattern;
+      Entity  : String;
+      Glob    : Boolean := False);
+   --  Add a new entity to the search pattern (the entity should have the
+   --  form pattern[:file[:line[:column]]], and it is parsed entirely in
+   --  this procedure. Glob indicates if we should use the 'globbing
+   --  patterns' (True) or the full regular expressions (False)
+
+   procedure Add_Xref_File (File : String);
+   --  Add a new file in the list of files to search for references. File
+   --  is interpreted as a globbing regular expression, which is expanded.
+
+   Invalid_Argument : exception;
+   --  Exception raised when there is a syntax error in the command line
+
+   -----------------------
+   -- Output Algorithms --
+   -----------------------
+
+   procedure Print_Gnatfind
+     (References     : Boolean;
+      Full_Path_Name : Boolean);
+   procedure Print_Unused (Full_Path_Name : Boolean);
+   procedure Print_Vi     (Full_Path_Name : Boolean);
+   procedure Print_Xref   (Full_Path_Name : Boolean);
+   --  The actual print procedures. These functions step through the symbol
+   --  table and print all the symbols if they match the files given on the
+   --  command line (they already match the entities if they are in the
+   --  symbol table)
+
+   ------------------------
+   -- General Algorithms --
+   ------------------------
+
+   function Default_Project_File (Dir_Name : String) return String;
+   --  Returns the default Project file name for the directory Dir_Name
+
+   procedure Search
+     (Pattern       : Search_Pattern;
+      Local_Symbols : Boolean;
+      Wide_Search   : Boolean;
+      Read_Only     : Boolean;
+      Der_Info      : Boolean;
+      Type_Tree     : Boolean);
+   --  Search every ALI file for entities matching Pattern, and add
+   --  these entities to the internal symbol tables.
+   --
+   --  If Wide_Search is True, all ALI files found in the object path
+   --  are searched.
+   --
+   --  If Read_Only is True, read-only ALI files will also be parsed,
+   --  similar to gnatmake -a.
+   --
+   --  If Der_Info is true, then the derived type information will be
+   --  processed.
+   --
+   --  If Type_Tree is true, then the type hierarchy will be searched
+   --  going from the pattern to the parent type.
+
+   procedure Search_Xref
+     (Local_Symbols : Boolean;
+      Read_Only     : Boolean;
+      Der_Info      : Boolean);
+   --  Search every ali file given in the command line and all their
+   --  dependencies. If Read_Only is True, we parse the read-only ali
+   --  files too. If Der_Mode is true then the derived type information will
+   --  be processed
+
+private
+   type Rec_DIR is limited record
+      Dir : GNAT.Directory_Operations.Dir_Type;
+   end record;
+
+   package Dependencies_Tables is new GNAT.Dynamic_Tables
+     (Table_Component_Type => Xr_Tabls.File_Reference,
+      Table_Index_Type     => Positive,
+      Table_Low_Bound      => 1,
+      Table_Initial        => 400,
+      Table_Increment      => 100);
+   use Dependencies_Tables;
+
+   type Dependencies is new Dependencies_Tables.Instance;
+
+   type ALI_File is limited record
+      Buffer : String_Access := null;
+      --  Buffer used to read the whole file at once
+
+      Current_Line : Positive;
+      --  Start of the current line in Buffer
+
+      Xref_Line : Positive;
+      --  Start of the xref lines in Buffer
+
+      X_File : Xr_Tabls.File_Reference;
+      --  Stores the cross-referencing file-name ("X..." lines), as an
+      --  index into the dependencies table
+
+      Dep : Dependencies;
+      --  Store file name associated with each number ("D..." lines)
+   end record;
+
+   --  The following record type stores all the patterns that are searched for
+
+   type Search_Pattern is record
+      Entity : GNAT.Regexp.Regexp;
+      --  A regular expression matching the entities we are looking for.
+      --  File is a list of the places where the declaration of the entities
+      --  has to be. When the user enters a file:line:column on the command
+      --  line, it is stored as "Entity_Name Declaration_File:line:column"
+
+      File_Ref : Xr_Tabls.File_Reference;
+      --  A reference to the source file, if any
+
+      Initialized : Boolean := False;
+      --  Set to True when Entity has been initialized
+   end record;
+
+end Xref_Lib;