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, 131 insertions, 0 deletions

diff --git a/gcc/ada/a-comlin.adb b/gcc/ada/a-comlin.adb
new file mode 100644
index 000000000..b29693638
--- /dev/null
+++ b/gcc/ada/a-comlin.adb
@@ -0,0 +1,131 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                     A D A . C O M M A N D _ L I N E                      --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--          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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+pragma Compiler_Unit;
+
+with System; use System;
+
+package body Ada.Command_Line is
+
+   function Arg_Count return Natural;
+   pragma Import (C, Arg_Count, "__gnat_arg_count");
+
+   procedure Fill_Arg (A : System.Address; Arg_Num : Integer);
+   pragma Import (C, Fill_Arg, "__gnat_fill_arg");
+
+   function Len_Arg (Arg_Num : Integer) return Integer;
+   pragma Import (C, Len_Arg, "__gnat_len_arg");
+
+   -----------------------
+   -- Local Subprograms --
+   -----------------------
+
+   function Initialized return Boolean;
+   --  Checks to ensure that gnat_argc and gnat_argv have been properly
+   --  initialized.  Returns false if not, or if argv / argc are
+   --  unsupported on the target (e.g. VxWorks).
+
+   --------------
+   -- Argument --
+   --------------
+
+   function Argument (Number : Positive) return String is
+      Num : Positive;
+
+   begin
+      if Number > Argument_Count then
+         raise Constraint_Error;
+      end if;
+
+      if Remove_Args = null then
+         Num := Number;
+      else
+         Num := Remove_Args (Number);
+      end if;
+
+      declare
+         Arg : aliased String (1 .. Len_Arg (Num));
+      begin
+         Fill_Arg (Arg'Address, Num);
+         return Arg;
+      end;
+   end Argument;
+
+   --------------------
+   -- Argument_Count --
+   --------------------
+
+   function Argument_Count return Natural is
+   begin
+      if not Initialized then
+         --  RM A.15 (11)
+         return 0;
+      end if;
+
+      if Remove_Args = null then
+         return Arg_Count - 1;
+      else
+         return Remove_Count;
+      end if;
+   end Argument_Count;
+
+   -----------------
+   -- Initialized --
+   -----------------
+
+   function Initialized return Boolean is
+      gnat_argv : System.Address;
+      pragma Import (C, gnat_argv, "gnat_argv");
+
+   begin
+      return gnat_argv /= System.Null_Address;
+   end Initialized;
+
+   ------------------
+   -- Command_Name --
+   ------------------
+
+   function Command_Name return String is
+   begin
+      if not Initialized then
+         return "";
+      end if;
+
+      declare
+         Arg : aliased String (1 .. Len_Arg (0));
+
+      begin
+         Fill_Arg (Arg'Address, 0);
+         return Arg;
+      end;
+   end Command_Name;
+
+end Ada.Command_Line;