compiler.h

   1 /* public domain */
   2
   3 #ifndef COMPILER_H
   4 #define COMPILER_H
   5
   6 #include "config-host.h"
   7
   8 #define QEMU_NORETURN __attribute__ ((__noreturn__))
   9 #ifdef CONFIG_GCC_ATTRIBUTE_WARN_UNUSED_RESULT
  10 #define QEMU_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
  11 #else
  12 #define QEMU_WARN_UNUSED_RESULT
  13 #endif
  14
  15 #if defined(_WIN32)
  16 # define QEMU_PACKED __attribute__((gcc_struct, packed))
  17 #else
  18 # define QEMU_PACKED __attribute__((packed))
  19 #endif
  20
  21 #define QEMU_BUILD_BUG_ON(x) \
  22     typedef char qemu_build_bug_on__##__LINE__[(x)?-1:1];
  23
  24 #if defined __GNUC__
  25 # if (__GNUC__ < 4) || \
  26      defined(__GNUC_MINOR__) && (__GNUC__ == 4) && (__GNUC_MINOR__ < 4)
  27    /* gcc versions before 4.4.x don't support gnu_printf, so use printf. */
  28 #  define GCC_ATTR __attribute__((__unused__, format(printf, 1, 2)))
  29 #  define GCC_FMT_ATTR(n, m) __attribute__((format(printf, n, m)))
  30 # else
  31    /* Use gnu_printf when supported (qemu uses standard format strings). */
  32 #  define GCC_ATTR __attribute__((__unused__, format(gnu_printf, 1, 2)))
  33 #  define GCC_FMT_ATTR(n, m) __attribute__((format(gnu_printf, n, m)))
  34 # endif
  35 #else
  36 #define GCC_ATTR /**/
  37 #define GCC_FMT_ATTR(n, m)
  38 #endif
  39
  40 #endif /* COMPILER_H */