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 #define QEMU_BUILD_BUG_ON(x) \
  16     typedef char qemu_build_bug_on__##__LINE__[(x)?-1:1];
  17
  18 #if defined __GNUC__
  19 # if (__GNUC__ < 4) || \
  20      defined(__GNUC_MINOR__) && (__GNUC__ == 4) && (__GNUC_MINOR__ < 4)
  21    /* gcc versions before 4.4.x don't support gnu_printf, so use printf. */
  22 #  define GCC_ATTR __attribute__((__unused__, format(printf, 1, 2)))
  23 #  define GCC_FMT_ATTR(n, m) __attribute__((format(printf, n, m)))
  24 # else
  25    /* Use gnu_printf when supported (qemu uses standard format strings). */
  26 #  define GCC_ATTR __attribute__((__unused__, format(gnu_printf, 1, 2)))
  27 #  define GCC_FMT_ATTR(n, m) __attribute__((format(gnu_printf, n, m)))
  28 # endif
  29 #else
  30 #define GCC_ATTR /**/
  31 #define GCC_FMT_ATTR(n, m)
  32 #endif
  33
  34 #endif /* COMPILER_H */