--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/g-comver.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,61 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                G N A T . C O M P I L E R _ V E R S I O N                 --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                     Copyright (C) 2002-2017, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package provides a routine for obtaining the version number of the
+--  GNAT compiler used to compile the program. It relies on the generated
+--  constant in the binder generated package that records this information.
+
+--  Note: to use this package you must first instantiate it, for example:
+
+--    package CVer is new GNAT.Compiler_Version;
+
+--  and then you use the function in the instantiated package (Cver.Version).
+--  The reason that this unit is generic is that otherwise the direct attempt
+--  to import the necessary variable from the binder file causes trouble when
+--  building a shared library, since the symbol is not available.
+
+--  Note: this unit is only useable if the main program is written in Ada.
+--  It cannot be used if the main program is written in foreign language.
+
+generic
+package GNAT.Compiler_Version is
+   pragma Pure;
+
+   function Version return String;
+   --  This function returns the version in the form "v.vvx (yyyyddmm)".
+   --  Here v.vv is the main version number (e.g. 3.16), x is the version
+   --  designator (e.g. a1 in 3.16a1), and yyyyddmm is the date in ISO form.
+   --  An example of the returned value would be "3.16w (20021029)". The
+   --  version is actually that of the binder used to bind the program,
+   --  which will be the same as the compiler version if a consistent
+   --  set of tools is used to build the program.
+
+end GNAT.Compiler_Version;