#ifndef __has_feature
#define __has_feature(x) 0
#endif
+#ifndef __has_extension
+ #define __has_extension(x) 0
+#endif
#if __GNUC__ && !__CHECKER__
#define NO_RETURN __attribute__((__noreturn__))
#define OVS_UNUSED __attribute__((__unused__))
#define PRINTF_FORMAT(FMT, ARG1) __attribute__((__format__(printf, FMT, ARG1)))
+#define SCANF_FORMAT(FMT, ARG1) __attribute__((__format__(scanf, FMT, ARG1)))
#define STRFTIME_FORMAT(FMT) __attribute__((__format__(__strftime__, FMT, 0)))
#define MALLOC_LIKE __attribute__((__malloc__))
#define ALWAYS_INLINE __attribute__((always_inline))
#define NO_RETURN
#define OVS_UNUSED
#define PRINTF_FORMAT(FMT, ARG1)
+#define SCANF_FORMAT(FMT, ARG1)
#define STRFTIME_FORMAT(FMT)
#define MALLOC_LIKE
#define ALWAYS_INLINE
#define OVS_EXCLUDED(...) __attribute__((locks_excluded(__VA_ARGS__)))
#define OVS_ACQ_BEFORE(...) __attribute__((acquired_before(__VA_ARGS__)))
#define OVS_ACQ_AFTER(...) __attribute__((acquired_after(__VA_ARGS__)))
+#define OVS_NO_THREAD_SAFETY_ANALYSIS \
+ __attribute__((no_thread_safety_analysis))
#else /* not Clang */
#define OVS_LOCKABLE
#define OVS_REQ_RDLOCK(...)
#define OVS_RELEASES(...)
#define OVS_ACQ_BEFORE(...)
#define OVS_ACQ_AFTER(...)
+#define OVS_NO_THREAD_SAFETY_ANALYSIS
#endif
/* ISO C says that a C implementation may choose any integer type for an enum