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+------------------------------------------------------------------------------
+-- --
+-- GNAT COMPILER COMPONENTS --
+-- --
+-- G N A T . O S _ L I B --
+-- --
+-- S p e c --
+-- --
+-- Copyright (C) 1995-2009, 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. --
+-- --
+------------------------------------------------------------------------------
+
+-- Operating system interface facilities
+
+-- This package contains types and procedures for interfacing to the
+-- underlying OS. It is used by the GNAT compiler and by tools associated
+-- with the GNAT compiler, and therefore works for the various operating
+-- systems to which GNAT has been ported. This package will undoubtedly grow
+-- as new services are needed by various tools.
+
+-- This package tends to use fairly low-level Ada in order to not bring in
+-- large portions of the RTL. For example, functions return access to string
+-- as part of avoiding functions returning unconstrained types.
+
+-- Except where specifically noted, these routines are portable across all
+-- GNAT implementations on all supported operating systems.
+
+-- See file s-os_lib.ads for full documentation of the interface
+
+with System.OS_Lib;
+
+package GNAT.OS_Lib renames System.OS_Lib;