--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/a-sequio.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,160 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                    A D A . S E Q U E N T I A L _ I O                     --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 1992-2017, Free Software Foundation, Inc.         --
+--                                                                          --
+-- This specification is derived from the Ada Reference Manual for use with --
+-- GNAT. The copyright notice above, and the license provisions that follow --
+-- apply solely to the  contents of the part following the private keyword. --
+--                                                                          --
+-- 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with Ada.IO_Exceptions;
+
+with System.Sequential_IO;
+
+generic
+   type Element_Type (<>) is private;
+
+package Ada.Sequential_IO is
+
+   pragma Compile_Time_Warning
+     (Element_Type'Has_Access_Values,
+      "Element_Type for Sequential_IO instance has access values");
+
+   pragma Compile_Time_Warning
+     (Element_Type'Has_Tagged_Values,
+      "Element_Type for Sequential_IO instance has tagged values");
+
+   type File_Type is limited private;
+
+   type File_Mode is (In_File, Out_File, Append_File);
+
+   --  The following representation clause allows the use of unchecked
+   --  conversion for rapid translation between the File_Mode type
+   --  used in this package and System.File_IO.
+
+   for File_Mode use
+     (In_File     => 0,  -- System.File_IO.File_Mode'Pos (In_File)
+      Out_File    => 2,  -- System.File_IO.File_Mode'Pos (Out_File)
+      Append_File => 3); -- System.File_IO.File_Mode'Pos (Append_File)
+
+   ---------------------
+   -- File management --
+   ---------------------
+
+   procedure Create
+     (File : in out File_Type;
+      Mode : File_Mode := Out_File;
+      Name : String := "";
+      Form : String := "");
+
+   procedure Open
+     (File : in out File_Type;
+      Mode : File_Mode;
+      Name : String;
+      Form : String := "");
+
+   procedure Close  (File : in out File_Type);
+   procedure Delete (File : in out File_Type);
+   procedure Reset  (File : in out File_Type; Mode : File_Mode);
+   procedure Reset  (File : in out File_Type);
+
+   function Mode    (File : File_Type) return File_Mode;
+   function Name    (File : File_Type) return String;
+   function Form    (File : File_Type) return String;
+
+   function Is_Open (File : File_Type) return Boolean;
+
+   procedure Flush (File : File_Type);
+
+   ---------------------------------
+   -- Input and output operations --
+   ---------------------------------
+
+   procedure Read  (File : File_Type; Item : out Element_Type);
+   procedure Write (File : File_Type; Item : Element_Type);
+
+   function End_Of_File (File : File_Type) return Boolean;
+
+   ----------------
+   -- Exceptions --
+   ----------------
+
+   Status_Error : exception renames IO_Exceptions.Status_Error;
+   Mode_Error   : exception renames IO_Exceptions.Mode_Error;
+   Name_Error   : exception renames IO_Exceptions.Name_Error;
+   Use_Error    : exception renames IO_Exceptions.Use_Error;
+   Device_Error : exception renames IO_Exceptions.Device_Error;
+   End_Error    : exception renames IO_Exceptions.End_Error;
+   Data_Error   : exception renames IO_Exceptions.Data_Error;
+
+private
+
+   --  The following procedures have a File_Type formal of mode IN OUT because
+   --  they may close the original file. The Close operation may raise an
+   --  exception, but in that case we want any assignment to the formal to
+   --  be effective anyway, so it must be passed by reference (or the caller
+   --  will be left with a dangling pointer).
+
+   pragma Export_Procedure
+     (Internal  => Close,
+      External  => "",
+      Mechanism => Reference);
+   pragma Export_Procedure
+     (Internal  => Delete,
+      External  => "",
+      Mechanism => Reference);
+   pragma Export_Procedure
+     (Internal        => Reset,
+      External        => "",
+      Parameter_Types => (File_Type),
+      Mechanism       => Reference);
+   pragma Export_Procedure
+     (Internal        => Reset,
+      External        => "",
+      Parameter_Types => (File_Type, File_Mode),
+      Mechanism       => (File => Reference));
+
+   type File_Type is new System.Sequential_IO.File_Type;
+
+   --  All subprograms are inlined
+
+   pragma Inline (Close);
+   pragma Inline (Create);
+   pragma Inline (Delete);
+   pragma Inline (End_Of_File);
+   pragma Inline (Form);
+   pragma Inline (Is_Open);
+   pragma Inline (Mode);
+   pragma Inline (Name);
+   pragma Inline (Open);
+   pragma Inline (Read);
+   pragma Inline (Reset);
+   pragma Inline (Write);
+
+end Ada.Sequential_IO;