--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/g-io.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,91 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                              G N A T . I O                               --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                     Copyright (C) 1995-2017, AdaCore                     --
+--                                                                          --
+-- 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  A simple preelaborable subset of Text_IO capabilities
+
+--  A simple text I/O package that can be used for simple I/O functions in
+--  user programs as required. This package is also preelaborated, unlike
+--  Text_IO, and can thus be with'ed by preelaborated library units.
+
+--  Note that Data_Error is not raised by these subprograms for bad data.
+--  If such checks are needed then the regular Text_IO package must be used.
+
+package GNAT.IO is
+   pragma Preelaborate;
+
+   type File_Type is limited private;
+   --  Specifies file to be used (the only possibilities are Standard_Output
+   --  and Standard_Error). There is no Create or Open facility that would
+   --  allow more general use of file names.
+
+   function Standard_Output return File_Type;
+   function Standard_Error  return File_Type;
+   --  These functions are the only way to get File_Type values
+
+   procedure Get (X : out Integer);
+   procedure Get (C : out Character);
+   procedure Get_Line (Item : out String; Last : out Natural);
+   --  These routines always read from Standard_Input
+
+   procedure Put (File : File_Type; X : Integer);
+   procedure Put (X : Integer);
+   --  Output integer to specified file, or to current output file, same
+   --  output as if Ada.Text_IO.Integer_IO had been instantiated for Integer.
+
+   procedure Put (File : File_Type; C : Character);
+   procedure Put (C : Character);
+   --  Output character to specified file, or to current output file
+
+   procedure Put (File : File_Type; S : String);
+   procedure Put (S : String);
+   --  Output string to specified file, or to current output file
+
+   procedure Put_Line (File : File_Type; S : String);
+   procedure Put_Line (S : String);
+   --  Output string followed by new line to specified file, or to
+   --  current output file.
+
+   procedure New_Line (File : File_Type; Spacing : Positive := 1);
+   procedure New_Line (Spacing : Positive := 1);
+   --  Output new line character to specified file, or to current output file
+
+   procedure Set_Output (File : File_Type);
+   --  Set current output file, default is Standard_Output if no call to
+   --  Set_Output is made.
+
+private
+   type File_Type is (Stdout, Stderr);
+   --  Stdout = Standard_Output, Stderr = Standard_Error
+
+   pragma Inline (Standard_Error);
+   pragma Inline (Standard_Output);
+
+end GNAT.IO;