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, 81 insertions, 0 deletions

diff --git a/gcc/ada/fmap.ads b/gcc/ada/fmap.ads
new file mode 100644
index 000000000..f1d54db47
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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                                 F M A P                                  --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 2001-2009, 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.  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 keeps two mappings: from unit names to file names,
+--  and from file names to path names.
+--
+--  This mapping is used to communicate between the builder (gnatmake or
+--  gprbuild) and the compiler. The format of this mapping file is the
+--  following:
+--  For each source file, there are three lines in the mapping file:
+--    Unit name with %b or %s added depending on whether it is a body or a spec
+--              This line is omitted for file-based languages
+--    File name
+--    Path name (set to '/' if the file should be ignored in fact, ie for
+--               a Locally_Removed_File in a project)
+
+with Namet; use Namet;
+
+package Fmap is
+
+   procedure Initialize (File_Name : String);
+   --  Initialize the mappings from the mapping file File_Name.
+   --  If the mapping file is incorrect (non existent file, truncated file,
+   --  duplicate entries), output a warning and do not initialize the mappings.
+   --  Record the state of the mapping tables in case Update is called
+   --  later on.
+
+   function Mapped_Path_Name (File : File_Name_Type) return File_Name_Type;
+   --  Return the path name mapped to the file name File.
+   --  Return No_File if File is not mapped.
+
+   function Mapped_File_Name (Unit : Unit_Name_Type) return File_Name_Type;
+   --  Return the file name mapped to the unit name Unit.
+   --  Return No_File if Unit is not mapped.
+   --  Return Error_Name if it is forbidden.
+
+   procedure Add_To_File_Map
+     (Unit_Name : Unit_Name_Type;
+      File_Name : File_Name_Type;
+      Path_Name : File_Name_Type);
+   --  Add mapping of Unit_Name to File_Name and of File_Name to Path_Name
+
+   procedure Update_Mapping_File (File_Name : String);
+   --  If Add_To_File_Map has been called (after Initialize or any time
+   --  if Initialize has not been called), append the new entries to the
+   --  mapping file whose file name is File_Name.
+
+   procedure Reset_Tables;
+   --  Initialize all the internal data structures. This procedure is used
+   --  when several compilations are performed by the same process (by GNSA
+   --  for ASIS, for example) to remove any existing mappings from a previous
+   --  compilation.
+
+   procedure Add_Forbidden_File_Name (Name : File_Name_Type);
+   --  Indicate that a source file name is forbidden. This is used when there
+   --  are excluded sources in projects (attributes Excluded_Source_Files or
+   --  Locally_Removed_Files).
+
+end Fmap;