AVAHI_C_DECL_BEGIN
-#ifdef __GNUC__
-#if __GNUC__ >= 4
+#if defined(__GNUC__) && (__GNUC__ >= 4)
#define AVAHI_GCC_SENTINEL __attribute__ ((sentinel))
-#endif
-#endif
-
-#ifndef AVAHI_GCC_SENTINEL
+#else
/** Macro for usage of GCC's sentinel compilation warnings */
#define AVAHI_GCC_SENTINEL
#endif
#define AVAHI_GCC_NORETURN
#endif
+#ifdef __GNUC__
+#define AVAHI_GCC_UNUSED __attribute__ ((unused))
+#else
+/** Macro for not used parameter */
+#define AVAHI_GCC_UNUSED
+#endif
+
AVAHI_C_DECL_END
#endif