Archipelago » qemu

/* public domain */

#ifndef COMPILER_H

#define COMPILER_H

#include "config-host.h"

/*----------------------------------------------------------------------------

| The macro QEMU_GNUC_PREREQ tests for minimum version of the GNU C compiler.

| The code is a copy of SOFTFLOAT_GNUC_PREREQ, see softfloat-macros.h.

*----------------------------------------------------------------------------*/

#if defined(__GNUC__) && defined(__GNUC_MINOR__)

# define QEMU_GNUC_PREREQ(maj, min) \

         ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))

#else

# define QEMU_GNUC_PREREQ(maj, min) 0

#endif

#define QEMU_NORETURN __attribute__ ((__noreturn__))

#if QEMU_GNUC_PREREQ(3, 4)

#define QEMU_WARN_UNUSED_RESULT __attribute__((warn_unused_result))

#else

#define QEMU_WARN_UNUSED_RESULT

#endif

#if defined(_WIN32)

# define QEMU_PACKED __attribute__((gcc_struct, packed))

#else

# define QEMU_PACKED __attribute__((packed))

#endif

#define cat(x,y) x ## y

#define cat2(x,y) cat(x,y)

#define QEMU_BUILD_BUG_ON(x) \

    typedef char cat2(qemu_build_bug_on__,__LINE__)[(x)?-1:1];

#if defined __GNUC__

# if !QEMU_GNUC_PREREQ(4, 4)

   /* gcc versions before 4.4.x don't support gnu_printf, so use printf. */

#  define GCC_ATTR __attribute__((__unused__, format(printf, 1, 2)))

#  define GCC_FMT_ATTR(n, m) __attribute__((format(printf, n, m)))

# else

   /* Use gnu_printf when supported (qemu uses standard format strings). */

#  define GCC_ATTR __attribute__((__unused__, format(gnu_printf, 1, 2)))

#  define GCC_FMT_ATTR(n, m) __attribute__((format(gnu_printf, n, m)))

#  if defined(_WIN32)

    /* Map __printf__ to __gnu_printf__ because we want standard format strings

     * even when MinGW or GLib include files use __printf__. */

#   define __printf__ __gnu_printf__

#  endif

# endif

# if defined(__APPLE__)

#  define QEMU_WEAK_ALIAS(newname, oldname) \

        static typeof(oldname) weak_##newname __attribute__((unused, weakref(#oldname)))

#  define QEMU_WEAK_REF(newname, oldname) (weak_##newname ? weak_##newname : oldname)

# else

#  define QEMU_WEAK_ALIAS(newname, oldname) \

        typeof(oldname) newname __attribute__((weak, alias (#oldname)))

#  define QEMU_WEAK_REF(newname, oldname) newname

# endif

#else

#define GCC_ATTR /**/

#define GCC_FMT_ATTR(n, m)

#define QEMU_WEAK_ALIAS(newname, oldname) \

        _Pragma("weak " #newname "=" #oldname)

#endif

#endif /* COMPILER_H */