--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/indepsw.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,82 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                              I N D E P S W                               --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 2004-2009, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  GNATLINK platform-independent switches
+
+--  Used to convert GNAT switches to their platform-dependent switch
+--  equivalent for the underlying linker.
+
+with System.OS_Lib; use System.OS_Lib;
+
+package Indepsw is
+
+   type Switch_Kind is
+   --  Independent switches currently supported
+
+     (Map_File);
+      --  Produce a map file. The path name of the map file to produce
+      --  is given as an argument.
+
+   procedure Convert
+     (Switch   : Switch_Kind;
+      Argument : String;
+      To       : out String_List_Access);
+   --  Convert Switch to the platform-dependent linker switch (with or without
+   --  additional arguments) To. Issue a warning if Switch is not supported
+   --  for the platform; in this case, To is set to null.
+
+   function Is_Supported (Switch : Switch_Kind) return Boolean;
+   --  Return True for each independent switch supported by the platform
+
+private
+   --  Default warning messages when the switches are not supported by the
+   --  implementation. These are in the spec so that the platform specific
+   --  bodies do not need to redefine them.
+
+   Map_File_Not_Supported : aliased String :=
+     "the underlying linker does not allow the output of a map file";
+
+   No_Support_For : constant array (Switch_Kind) of String_Access :=
+                      (Map_File => Map_File_Not_Supported'Access);
+   --  All implementations of procedure Convert should include a case
+   --  statements with a "when others =>" choice that output the default
+   --  warning message:
+
+   --   case Switch is
+   --      when ... =>
+   --         ...
+   --      when others =>
+   --         Write_Str ("warning: ");
+   --         Write_Line (No_Support_For (Switch).all);
+   --         To := null;
+   --   end case;
+
+end Indepsw;