1/* public domain */
2
3#ifndef COMPILER_H
4#define COMPILER_H
5
6#include "config-host.h"
7
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
19#define QEMU_NORETURN __attribute__ ((__noreturn__))
20
21#if QEMU_GNUC_PREREQ(3, 4)
22#define QEMU_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
23#else
24#define QEMU_WARN_UNUSED_RESULT
25#endif
26
27#if defined(_WIN32)
28# define QEMU_PACKED __attribute__((gcc_struct, packed))
29#else
30# define QEMU_PACKED __attribute__((packed))
31#endif
32
33#define cat(x,y) x ## y
34#define cat2(x,y) cat(x,y)
35#define QEMU_BUILD_BUG_ON(x) \
36    typedef char cat2(qemu_build_bug_on__,__LINE__)[(x)?-1:1] __attribute__((unused));
37
38#if defined __GNUC__
39# if !QEMU_GNUC_PREREQ(4, 4)
40   /* gcc versions before 4.4.x don't support gnu_printf, so use printf. */
41#  define GCC_FMT_ATTR(n, m) __attribute__((format(printf, n, m)))
42# else
43   /* Use gnu_printf when supported (qemu uses standard format strings). */
44#  define GCC_FMT_ATTR(n, m) __attribute__((format(gnu_printf, n, m)))
45#  if defined(_WIN32)
46    /* Map __printf__ to __gnu_printf__ because we want standard format strings
47     * even when MinGW or GLib include files use __printf__. */
48#   define __printf__ __gnu_printf__
49#  endif
50# endif
51#else
52#define GCC_FMT_ATTR(n, m)
53#endif
54
55#endif /* COMPILER_H */
56