--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/s-imgenu.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,78 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                      S Y S T E M . I M G _ E N U M                       --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 2000-2017, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  Enumeration_Type'Image for all enumeration types except those in package
+--  Standard (where we have no opportunity to build image tables), and in
+--  package System (where it is too early to start building image tables).
+--  Special routines exist for the enumeration types in these packages.
+
+--  Note: this is an obsolete package, replaced by System.Img_Enum_New, which
+--  provides procedures instead of functions for these enumeration image calls.
+--  The reason we maintain this package is that when bootstrapping with old
+--  compilers, the old compiler will search for this unit, expecting to find
+--  these functions. The new compiler will search for procedures in the new
+--  version of the unit.
+
+pragma Compiler_Unit_Warning;
+
+package System.Img_Enum is
+   pragma Pure;
+
+   function Image_Enumeration_8
+     (Pos     : Natural;
+      Names   : String;
+      Indexes : System.Address) return String;
+   --  Used to compute Enum'Image (Str) where Enum is some enumeration type
+   --  other than those defined in package Standard. Names is a string with a
+   --  lower bound of 1 containing the characters of all the enumeration
+   --  literals concatenated together in sequence. Indexes is the address of an
+   --  array of type array (0 .. N) of Natural_8, where N is the number of
+   --  enumeration literals in the type. The Indexes values are the starting
+   --  subscript of each enumeration literal, indexed by Pos values, with an
+   --  extra entry at the end containing Names'Length + 1. The reason that
+   --  Indexes is passed by address is that the actual type is created on the
+   --  fly by the expander. The value returned is the desired 'Image value.
+
+   function Image_Enumeration_16
+     (Pos     : Natural;
+      Names   : String;
+      Indexes : System.Address) return String;
+   --  Identical to Image_Enumeration_8 except that it handles types
+   --  using array (0 .. Num) of Natural_16 for the Indexes table.
+
+   function Image_Enumeration_32
+     (Pos     : Natural;
+      Names   : String;
+      Indexes : System.Address) return String;
+   --  Identical to Image_Enumeration_8 except that it handles types
+   --  using array (0 .. Num) of Natural_32 for the Indexes table.
+
+end System.Img_Enum;