--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/g-sha224.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,50 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT LIBRARY COMPONENTS                          --
+--                                                                          --
+--                          G N A T . S H A 2 2 4                           --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--         Copyright (C) 2009-2017, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package implements the SHA-224 secure hash function as described in
+--  FIPS PUB 180-3. The complete text of FIPS PUB 180-3 can be found at:
+--    http://csrc.nist.gov/publications/fips/fips180-3/fips180-3_final.pdf
+
+--  See the declaration of GNAT.Secure_Hashes.H in g-sechas.ads for complete
+--  documentation.
+
+with GNAT.Secure_Hashes.SHA2_Common;
+with GNAT.Secure_Hashes.SHA2_32;
+with System;
+
+package GNAT.SHA224 is new GNAT.Secure_Hashes.H
+  (Block_Words    => GNAT.Secure_Hashes.SHA2_Common.Block_Words,
+   State_Words    => 8,
+   Hash_Words     => 7,
+   Hash_Bit_Order => System.High_Order_First,
+   Hash_State     => GNAT.Secure_Hashes.SHA2_32.Hash_State,
+   Initial_State  => GNAT.Secure_Hashes.SHA2_32.SHA224_Init_State,
+   Transform      => GNAT.Secure_Hashes.SHA2_32.Transform);