--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/g-htable.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,60 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                          G N A T . H T A B L E                           --
+--                                                                          --
+--                                 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  Hash table searching routines
+
+--  This package contains two separate packages. The Simple_HTable package
+--  provides a very simple abstraction that associates one element to one
+--  key value and takes care of all allocations automatically using the heap.
+--  The Static_HTable package provides a more complex interface that allows
+--  complete control over allocation.
+
+--  See file s-htable.ads for full documentation of the interface
+
+pragma Compiler_Unit_Warning;
+
+with System.HTable;
+
+package GNAT.HTable is
+   pragma Preelaborate;
+   pragma Elaborate_Body;
+   --  The elaborate body is because we have a dummy body to deal with
+   --  bootstrap path problems (we used to have a real body, and now we don't
+   --  need it any more, but the bootstrap requires that we have a dummy body,
+   --  since otherwise the old body gets picked up; also, we can't use pragma
+   --  No_Body because older bootstrap compilers don't support that).
+
+   generic package Simple_HTable renames System.HTable.Simple_HTable;
+   generic package Static_HTable renames System.HTable.Static_HTable;
+
+   generic function Hash renames System.HTable.Hash;
+
+end GNAT.HTable;