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, 99 insertions, 0 deletions

diff --git a/gcc/ada/fname.ads b/gcc/ada/fname.ads
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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                                F N A M E                                 --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 1992-2009, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package, together with its child package Fname.UF define the
+--  association between source file names and unit names as defined
+--  (see package Uname for definition of format of unit names).
+
+with Namet; use Namet;
+
+package Fname is
+
+   --  Note: this package spec does not depend on the Uname spec in the Ada
+   --  sense, but the comments and description of the semantics do depend on
+   --  the conventions established by Uname.
+
+   ---------------------------
+   -- File Name Conventions --
+   ---------------------------
+
+   --  GNAT requires that there be a one to one correspondence between source
+   --  file names (as used in the Osint package interface) and unit names as
+   --  defined by the Uname package. This correspondence is defined by the
+   --  two subprograms defined here in the Fname package.
+
+   --   For full rules of file naming, see GNAT User's Guide. Note that the
+   --   naming rules are affected by the presence of Source_File_Name pragmas
+   --   that have been previously processed.
+
+   --  Note that the file name does *not* include the directory name. The
+   --  management of directories is provided by Osint, and full file names
+   --  are used only for error message purposes within GNAT itself.
+
+   -----------------
+   -- Subprograms --
+   -----------------
+
+   function Is_Predefined_File_Name
+     (Fname              : File_Name_Type;
+      Renamings_Included : Boolean := True) return Boolean;
+   --  This function determines if the given file name (which must be a simple
+   --  file name with no directory information) is the file name for one of the
+   --  predefined library units (i.e. part of the Ada, System, or Interface
+   --  hierarchies). Note that units in the GNAT hierarchy are not considered
+   --  predefined (see Is_Internal_File_Name below). On return, Name_Buffer
+   --  contains the file name. The Renamings_Included parameter indicates
+   --  whether annex J renamings such as Text_IO are to be considered as
+   --  predefined. If Renamings_Included is True, then Text_IO will return
+   --  True, otherwise only children of Ada, Interfaces and System return True.
+
+   function Is_Predefined_File_Name
+     (Renamings_Included : Boolean := True) return Boolean;
+   --  This version is called with the file name already in Name_Buffer
+
+   function Is_Internal_File_Name
+     (Fname              : File_Name_Type;
+      Renamings_Included : Boolean := True) return Boolean;
+   --  Similar to Is_Predefined_File_Name. The internal file set is a superset
+   --  of the predefined file set including children of GNAT, and also children
+   --  of DEC for the VMS case.
+
+   procedure Tree_Read;
+   --  Dummy procedure (reads dummy table values from tree file)
+
+   procedure Tree_Write;
+   --  Writes out internal tables to current tree file using Tree_Write
+   --  This is actually a dummy routine, since the relevant table is
+   --  no longer used, but we retain it for now, to avoid a tree file
+   --  incompatibility with the 3.13 compiler. Should be removed for
+   --  the 3.14a release ???
+
+end Fname;