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/* attribute.h - portability hacks for __attribute__ usage in other header files
Copyright (C) 2001 Russell Kroll <rkroll@exploits.org>
2005 Arnaud Quette <arnaud.quette@free.fr>
2020 Jim Klimov <jimklimov@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef NUT_ATTRIBUTE_H_SEEN
#define NUT_ATTRIBUTE_H_SEEN 1
/* To complicate matters, compilers with native support
* for the keyword may expose or not expose it as a macro...
* but for those that perform such courtesy, or are known
* supporters, we can put up the flag. For others, someone
* with those compilers should check and file PRs to NUT.
*/
#if (!defined HAVE___ATTRIBUTE__) || (HAVE___ATTRIBUTE__ == 0)
# if ( defined(__GNUC__) && ( __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) ) ) || ( defined(__STRICT_ANSI__) && __STRICT_ANSI__ )
# ifndef __attribute__
# define __attribute__(x)
# endif
# ifndef HAVE___ATTRIBUTE__
# define HAVE___ATTRIBUTE__ 0
# endif
# else
# if defined(__clang__) || defined(__GNUC__) || defined(__SUNPRO_C)
# ifndef HAVE___ATTRIBUTE__
# define HAVE___ATTRIBUTE__ 1
# endif
# else
# ifndef HAVE___ATTRIBUTE__
# define HAVE___ATTRIBUTE__ 0
# endif
# endif
# endif
#endif
#if (!defined HAVE___ATTRIBUTE__) || (HAVE___ATTRIBUTE__ == 0)
# ifdef HAVE___ATTRIBUTE__UNUSED_ARG
# undef HAVE___ATTRIBUTE__UNUSED_ARG
# endif
# ifdef HAVE___ATTRIBUTE__UNUSED_FUNC
# undef HAVE___ATTRIBUTE__UNUSED_FUNC
# endif
# ifdef HAVE___ATTRIBUTE__NORETURN
# undef HAVE___ATTRIBUTE__NORETURN
# endif
# ifdef HAVE___ATTRIBUTE__
# undef HAVE___ATTRIBUTE__
# endif
#endif
/* Other source files now can simply check for `ifdef HAVE___ATTRIBUTE__*`
* as usual, and not bother about 0/1 values of the macro as well.
*/
#endif /* NUT_ATTRIBUTE_H_SEEN */
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