# endif /* GNUC >= 4.3 */
#endif /* ATTRIBUTE_HOT */
+/* Attribute 'no_sanitize_undefined' was valid as of gcc 4.9. */
+#ifndef ATTRIBUTE_NO_SANITIZE_UNDEFINED
+# if (GCC_VERSION >= 4009)
+# define ATTRIBUTE_NO_SANITIZE_UNDEFINED __attribute__ ((no_sanitize_undefined))
+# else
+# define ATTRIBUTE_NO_SANITIZE_UNDEFINED
+# endif /* GNUC >= 4.9 */
+#endif /* ATTRIBUTE_NO_SANITIZE_UNDEFINED */
+
/* We use __extension__ in some places to suppress -pedantic warnings
about GCC extensions. This feature didn't work properly before
gcc 2.8. */
#define ENUM_BITFIELD(TYPE) __extension__ enum TYPE
#else
#define ENUM_BITFIELD(TYPE) unsigned int
+#endif
+
+ /* This is used to mark a class or virtual function as final. */
+#if __cplusplus >= 201103L
+#define GCC_FINAL final
+#elif GCC_VERSION >= 4007
+#define GCC_FINAL __final
+#else
+#define GCC_FINAL
#endif
#ifdef __cplusplus