/*
* Copyright (C) 2003-2011 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_GCC_H
#define MPD_GCC_H
#define GCC_CHECK_VERSION(major, minor) \
(defined(__GNUC__) && \
(__GNUC__ > (major) || \
(__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))))
/* this allows us to take advantage of special gcc features while still
* allowing other compilers to compile:
*
* example taken from: http://rlove.org/log/2005102601
*/
#if GCC_CHECK_VERSION(3,0)
# define gcc_const __attribute__((const))
# define gcc_pure __attribute__((pure))
# define gcc_malloc __attribute__((malloc))
# define gcc_must_check __attribute__ ((warn_unused_result))
# define gcc_packed __attribute__ ((packed))
/* these are very useful for type checking */
# define gcc_printf __attribute__ ((format(printf,1,2)))
# define gcc_fprintf __attribute__ ((format(printf,2,3)))
# define gcc_fprintf_ __attribute__ ((format(printf,3,4)))
# define gcc_fprintf__ __attribute__ ((format(printf,4,5)))
# define gcc_scanf __attribute__ ((format(scanf,1,2)))
# define gcc_used __attribute__ ((used))
# define gcc_unused __attribute__((unused))
# define gcc_warn_unused_result __attribute__((warn_unused_result))
/* # define inline inline __attribute__ ((always_inline)) */
# define gcc_noinline __attribute__ ((noinline))
# define gcc_nonnull(...) __attribute__((nonnull(__VA_ARGS__)))
# define gcc_nonnull_all __attribute__((nonnull))
# define gcc_likely(x) __builtin_expect (!!(x), 1)
# define gcc_unlikely(x) __builtin_expect (!!(x), 0)
#else
# define gcc_unused
# define gcc_const
# define gcc_pure
# define gcc_malloc
# define gcc_must_check
# define gcc_packed
# define gcc_printf
# define gcc_fprintf
# define gcc_fprintf_
# define gcc_fprintf__
# define gcc_scanf
# define gcc_used
# define gcc_unused
# define gcc_warn_unused_result
/* # define inline */
# define gcc_noinline
# define gcc_nonnull(...)
# define gcc_nonnull_all
# define gcc_likely(x) (x)
# define gcc_unlikely(x) (x)
#endif
#if defined(__GNUC__) || defined(__clang__)
#define gcc_unreachable() __builtin_unreachable()
#else
#define gcc_unreachable()
#endif
#ifdef __cplusplus
#ifdef __GNUC__
/* "__restrict__" is a GCC extension for C++ */
#define restrict __restrict__
#else
/* disable it on other compilers */
#define restrict
#endif
#if !defined(__clang__) && defined(__GNUC__) && !GCC_CHECK_VERSION(4,6)
#error Your gcc version is too old. MPD requires gcc 4.6 or newer.
#endif
/* support for C++11 "override" was added in gcc 4.7 */
#if !defined(__clang__) && defined(__GNUC__) && !GCC_CHECK_VERSION(4,7)
#define override
#define final
#endif
#endif
#endif /* MPD_GCC_H */
