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1/* public domain */
2
3#ifndef COMPILER_H
4#define COMPILER_H
5
6#include "config-host.h"
7
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8/*----------------------------------------------------------------------------
9| The macro QEMU_GNUC_PREREQ tests for minimum version of the GNU C compiler.
10| The code is a copy of SOFTFLOAT_GNUC_PREREQ, see softfloat-macros.h.
11*----------------------------------------------------------------------------*/
12#if defined(__GNUC__) && defined(__GNUC_MINOR__)
13# define QEMU_GNUC_PREREQ(maj, min) \
14 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
15#else
16# define QEMU_GNUC_PREREQ(maj, min) 0
17#endif
18
5c026320 19#define QEMU_NORETURN __attribute__ ((__noreturn__))
f8b72754 20
87751797 21#if QEMU_GNUC_PREREQ(3, 4)
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22#define QEMU_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
23#else
24#define QEMU_WARN_UNUSED_RESULT
25#endif
26
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27#if defined(_WIN32)
28# define QEMU_PACKED __attribute__((gcc_struct, packed))
29#else
30# define QEMU_PACKED __attribute__((packed))
31#endif
32
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33#define cat(x,y) x ## y
34#define cat2(x,y) cat(x,y)
5c026320 35#define QEMU_BUILD_BUG_ON(x) \
ea8f978f 36 typedef char cat2(qemu_build_bug_on__,__LINE__)[(x)?-1:1];
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37
38#if defined __GNUC__
f8b72754 39# if !QEMU_GNUC_PREREQ(4, 4)
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40 /* gcc versions before 4.4.x don't support gnu_printf, so use printf. */
41# define GCC_ATTR __attribute__((__unused__, format(printf, 1, 2)))
42# define GCC_FMT_ATTR(n, m) __attribute__((format(printf, n, m)))
43# else
44 /* Use gnu_printf when supported (qemu uses standard format strings). */
45# define GCC_ATTR __attribute__((__unused__, format(gnu_printf, 1, 2)))
46# define GCC_FMT_ATTR(n, m) __attribute__((format(gnu_printf, n, m)))
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47# if defined(_WIN32)
48 /* Map __printf__ to __gnu_printf__ because we want standard format strings
49 * even when MinGW or GLib include files use __printf__. */
50# define __printf__ __gnu_printf__
51# endif
5c026320 52# endif
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53#if defined(_WIN32)
54#define GCC_WEAK __attribute__((weak))
55#define GCC_WEAK_DECL GCC_WEAK
56#else
6ee373a0 57#define GCC_WEAK __attribute__((weak))
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58#define GCC_WEAK_DECL
59#endif
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60#else
61#define GCC_ATTR /**/
62#define GCC_FMT_ATTR(n, m)
63#endif
64
65#endif /* COMPILER_H */