MPD 0.17~git
src/gcc.h
Go to the documentation of this file.
00001 /*
00002  * Copyright (C) 2003-2011 The Music Player Daemon Project
00003  * http://www.musicpd.org
00004  *
00005  * This program is free software; you can redistribute it and/or modify
00006  * it under the terms of the GNU General Public License as published by
00007  * the Free Software Foundation; either version 2 of the License, or
00008  * (at your option) any later version.
00009  *
00010  * This program is distributed in the hope that it will be useful,
00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013  * GNU General Public License for more details.
00014  *
00015  * You should have received a copy of the GNU General Public License along
00016  * with this program; if not, write to the Free Software Foundation, Inc.,
00017  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
00018  */
00019 
00020 #ifndef MPD_GCC_H
00021 #define MPD_GCC_H
00022 
00023 #define GCC_CHECK_VERSION(major, minor) \
00024         (defined(__GNUC__) && \
00025          (__GNUC__ > (major) || \
00026           (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))))
00027 
00028 /* this allows us to take advantage of special gcc features while still
00029  * allowing other compilers to compile:
00030  *
00031  * example taken from: http://rlove.org/log/2005102601
00032  */
00033 
00034 #if GCC_CHECK_VERSION(3,0)
00035 #  define gcc_must_check        __attribute__ ((warn_unused_result))
00036 #  define gcc_packed            __attribute__ ((packed))
00037 /* these are very useful for type checking */
00038 #  define gcc_printf            __attribute__ ((format(printf,1,2)))
00039 #  define gcc_fprintf           __attribute__ ((format(printf,2,3)))
00040 #  define gcc_fprintf_          __attribute__ ((format(printf,3,4)))
00041 #  define gcc_fprintf__         __attribute__ ((format(printf,4,5)))
00042 #  define gcc_scanf             __attribute__ ((format(scanf,1,2)))
00043 #  define gcc_used              __attribute__ ((used))
00044 /* #  define inline     inline __attribute__ ((always_inline)) */
00045 #  define gcc_noinline          __attribute__ ((noinline))
00046 #  define gcc_nonnull(...) __attribute__((nonnull(__VA_ARGS__)))
00047 #  define gcc_nonnull_all __attribute__((nonnull))
00048 #else
00049 #  define gcc_must_check
00050 #  define gcc_packed
00051 #  define gcc_printf
00052 #  define gcc_fprintf
00053 #  define gcc_fprintf_
00054 #  define gcc_fprintf__
00055 #  define gcc_scanf
00056 #  define gcc_used
00057 /* #  define inline */
00058 #  define gcc_noinline
00059 #  define gcc_nonnull(...)
00060 #  define gcc_nonnull_all
00061 #endif
00062 
00063 #endif /* MPD_GCC_H */