--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/a-swunau.adb	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,65 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                          GNAT RUN-TIME COMPONENTS                        --
+--                                                                          --
+--        A D A . S T R I N G S . W I D E _ U N B O U N D E D . A U X       --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--          Copyright (C) 1992-2017, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+package body Ada.Strings.Wide_Unbounded.Aux is
+
+   --------------------
+   -- Get_Wide_String --
+   ---------------------
+
+   procedure Get_Wide_String
+     (U : Unbounded_Wide_String;
+      S : out Big_Wide_String_Access;
+      L : out Natural)
+   is
+      X : aliased Big_Wide_String;
+      for X'Address use U.Reference.all'Address;
+
+   begin
+      S := X'Unchecked_Access;
+      L := U.Last;
+   end Get_Wide_String;
+
+   ---------------------
+   -- Set_Wide_String --
+   ---------------------
+
+   procedure Set_Wide_String
+     (UP : in out Unbounded_Wide_String;
+      S  : Wide_String_Access)
+   is
+   begin
+      Finalize (UP);
+      UP.Reference := S;
+      UP.Last := UP.Reference'Length;
+   end Set_Wide_String;
+
+end Ada.Strings.Wide_Unbounded.Aux;