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// ***************************************************************** -*- C++ -*-
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/*
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* Copyright (C) 2004-2015 Andreas Huggel <ahuggel@gmx.net>
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*
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* This program is part of the Exiv2 distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.
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*/
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/*!
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@file rcsid_int.hpp
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@brief Define an RCS id string in every object file compiled from a source
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file that includes rcsid_int.hpp.
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This is a simplified version of the ACE_RCSID macro that is used in the
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<a href="http://www.cs.wustl.edu/~schmidt/ACE.html">ACE(TM)</a> distribution.
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@version $Rev$
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@author Andreas Huggel (ahu)
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<a href="mailto:ahuggel@gmx.net">ahuggel@gmx.net</a>
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@date 02-Feb-04, ahu: created
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*/
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#ifndef RCSID_INT_HPP_
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#define RCSID_INT_HPP_
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#if !defined (EXIV2_RCSID)
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/*!
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@brief Macro to store version information in each object file.
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Use this macro by including the following two lines at the beginning of
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each *.cpp file. See the ident(1) manual pages for more information.
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@code
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#include "rcsid_int.hpp"
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EXIV2_RCSID("@(#) $Id$");
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@endcode
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The macro hack itself has the following purposes:
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-# To define the RCS id string variable in the local namespace, so
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that there won't be any duplicate extern symbols at link time.
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-# To avoid warnings of the type "variable declared and never used".
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*/
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#if (defined(__GNUG__) || defined(__GNUC__) || defined (_MSC_VER)) && ! defined(__clang__)
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#define EXIV2_RCSID(id) \
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namespace { \
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inline const char* getRcsId(const char*) { return id ; } \
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const char* rcsId = getRcsId(rcsId); \
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}
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#else
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#define EXIV2_RCSID(id)
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#endif
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#endif // #if !defined (EXIV2_RCSID)
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#endif // #ifndef RCSID_INT_HPP_
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