libutil.h

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00001 /****************************************************************************
00002 ** Copyright (C) 2001-2010 Klaralvdalens Datakonsult AB.  All rights reserved.
00003 **
00004 ** This file is part of the KD Chart library.
00005 **
00006 ** Licensees holding valid commercial KD Chart licenses may use this file in
00007 ** accordance with the KD Chart Commercial License Agreement provided with
00008 ** the Software.
00009 **
00010 **
00011 ** This file may be distributed and/or modified under the terms of the
00012 ** GNU General Public License version 2 and version 3 as published by the
00013 ** Free Software Foundation and appearing in the file LICENSE.GPL included.
00014 **
00015 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
00016 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
00017 **
00018 ** Contact info@kdab.com if any conditions of this licensing are not
00019 ** clear to you.
00020 **
00021 **********************************************************************/
00022 
00023 #ifndef __ASCSHARED_UTIL_LIBUTIL_H__
00024 #define __ASCSHARED_UTIL_LIBUTIL_H__
00025 
00026 // These two macros can be used to force the loading of static objects in static libraries.
00027 // Under normal circumstances, the linker automatically discards unused library symbols from the final executable,
00028 // which is a problem for static objects with a constructor performing a specific action such as registration.
00029 // Note that the export macro only needs to be included once per .cpp file (even if there are many static objects in the file).
00030 // Parameters :
00031 // - ID : an file-wide identifier, e.g. the filename without the extension.
00032 //        It shouldn't be quoted, no spaces, and contain only alphanumerical characters.
00033 #define KDAB_EXPORT_STATIC_SYMBOLS( ID ) int __init_##ID##_static_symbols(){ return 0; }
00034 #define KDAB_IMPORT_STATIC_SYMBOLS( ID ) extern int __init_##ID##_static_symbols(); \
00035     static int fake_init##ID = __init_##ID##_static_symbols();
00036 
00037 #endif // __ASCSHARED_UTIL_LIBUTIL_H__