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+------------------------------------------------------------------------------
+-- --
+-- GNAT COMPILER COMPONENTS --
+-- --
+-- G N A T . C O M P I L E R _ V E R S I O N --
+-- --
+-- B o d y --
+-- --
+-- Copyright (C) 2002-2010, 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.
+
+package body GNAT.Compiler_Version is
+
+ Ver_Len_Max : constant := 256;
+ -- This is logically a reference to Gnatvsn.Ver_Len_Max but we cannot
+ -- import this directly since run-time units cannot WITH compiler units.
+
+ Ver_Prefix : constant String := "GNAT Version: ";
+ -- This is logically a reference to Gnatvsn.Ver_Prefix but we cannot
+ -- import this directly since run-time units cannot WITH compiler units.
+
+ GNAT_Version : constant String (1 .. Ver_Len_Max + Ver_Prefix'Length);
+ pragma Import (C, GNAT_Version, "__gnat_version");
+
+ -------------
+ -- Version --
+ -------------
+
+ function Version return String is
+ begin
+ -- Search for terminating right paren or NUL ending the string
+
+ for J in Ver_Prefix'Length + 1 .. GNAT_Version'Last loop
+ if GNAT_Version (J) = ')' then
+ return GNAT_Version (Ver_Prefix'Length + 1 .. J);
+ end if;
+
+ if GNAT_Version (J) = Character'Val (0) then
+ return GNAT_Version (Ver_Prefix'Length + 1 .. J - 1);
+ end if;
+ end loop;
+
+ -- This should not happen (no right paren or NUL found)
+
+ return GNAT_Version;
+ end Version;
+
+end GNAT.Compiler_Version;