1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/*
* Copyright (C) 2003-2014 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 COMPILER_H
#define COMPILER_H
#define GCC_MAKE_VERSION(major, minor, patchlevel) ((major) * 10000 + (minor) * 100 + patchlevel)
#ifdef __GNUC__
#define GCC_VERSION GCC_MAKE_VERSION(__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__)
#else
#define GCC_VERSION 0
#endif
#define GCC_CHECK_VERSION(major, minor) \
(defined(__GNUC__) && GCC_VERSION >= GCC_MAKE_VERSION(major, minor, 0))
#ifdef __clang__
# define CLANG_VERSION GCC_MAKE_VERSION(__clang_major__, __clang_minor__, __clang_patchlevel__)
# if __clang_major__ < 3
# error Sorry, your clang version is too old. You need at least version 3.1.
# endif
#elif defined(__GNUC__)
# if !GCC_CHECK_VERSION(4,6)
# error Sorry, your gcc version is too old. You need at least version 4.6.
# endif
#else
# warning Untested compiler. Use at your own risk!
#endif
#if GCC_CHECK_VERSION(4,0)
/* GCC 4.x */
#define gcc_const __attribute__((const))
#define gcc_deprecated __attribute__((deprecated))
#define gcc_may_alias __attribute__((may_alias))
#define gcc_malloc __attribute__((malloc))
#define gcc_noreturn __attribute__((noreturn))
#define gcc_packed __attribute__((packed))
#define gcc_printf(a,b) __attribute__((format(printf, a, b)))
#define gcc_pure __attribute__((pure))
#define gcc_sentinel __attribute__((sentinel))
#define gcc_unused __attribute__((unused))
#define gcc_warn_unused_result __attribute__((warn_unused_result))
#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)
#define gcc_aligned(n) __attribute__((aligned(n)))
#define gcc_visibility_hidden __attribute__((visibility("hidden")))
#define gcc_visibility_default __attribute__((visibility("default")))
#define gcc_always_inline __attribute__((always_inline))
#else
/* generic C compiler */
#define gcc_const
#define gcc_deprecated
#define gcc_may_alias
#define gcc_malloc
#define gcc_noreturn
#define gcc_packed
#define gcc_printf(a,b)
#define gcc_pure
#define gcc_sentinel
#define gcc_unused
#define gcc_warn_unused_result
#define gcc_nonnull(...)
#define gcc_nonnull_all
#define gcc_likely(x) (x)
#define gcc_unlikely(x) (x)
#define gcc_aligned(n)
#define gcc_visibility_hidden
#define gcc_visibility_default
#define gcc_always_inline inline
#endif
#if GCC_CHECK_VERSION(4,3)
#define gcc_hot __attribute__((hot))
#define gcc_cold __attribute__((cold))
#else /* ! GCC_UNUSED >= 40300 */
#define gcc_hot
#define gcc_cold
#endif /* ! GCC_UNUSED >= 40300 */
#if GCC_CHECK_VERSION(4,6) && !defined(__clang__)
#define gcc_flatten __attribute__((flatten))
#else
#define gcc_flatten
#endif
#ifndef __cplusplus
/* plain C99 has "restrict" */
#define gcc_restrict restrict
#elif GCC_CHECK_VERSION(4,0)
/* "__restrict__" is a GCC extension for C++ */
#define gcc_restrict __restrict__
#else
/* disable it on other compilers */
#define gcc_restrict
#endif
/* C++11 features */
#if defined(__cplusplus)
/* support for C++11 "override" was added in gcc 4.7 */
#if !defined(__clang__) && !GCC_CHECK_VERSION(4,7)
#define override
#define final
#endif
#if defined(__clang__) || GCC_CHECK_VERSION(4,8)
#define gcc_alignas(T, fallback) alignas(T)
#else
#define gcc_alignas(T, fallback) gcc_aligned(fallback)
#endif
#endif
#ifndef __has_feature
// define dummy macro for non-clang compilers
#define __has_feature(x) 0
#endif
#if __has_feature(attribute_unused_on_fields)
#define gcc_unused_field gcc_unused
#else
#define gcc_unused_field
#endif
#if defined(__GNUC__) || defined(__clang__)
#define gcc_unreachable() __builtin_unreachable()
#else
#define gcc_unreachable()
#endif
#endif
|
