+#define CAA_BUILD_BUG_ON(cond) ((void)CAA_BUILD_BUG_ON_ZERO(cond))
+
+/*
+ * __rcu is an annotation that documents RCU pointer accesses that need
+ * to be protected by a read-side critical section. Eventually, a static
+ * checker will be able to use this annotation to detect incorrect RCU
+ * usage.
+ */
+#define __rcu
+
+#ifdef __cplusplus
+#define URCU_FORCE_CAST(type, arg) (reinterpret_cast<type>(arg))
+#else
+#define URCU_FORCE_CAST(type, arg) ((type) (arg))
+#endif
+
+#define caa_is_signed_type(type) ((type) -1 < (type) 0)
+
+/*
+ * Sign-extend to long if needed, and output type is unsigned long.
+ */
+#define caa_cast_long_keep_sign(v) \
+ (caa_is_signed_type(__typeof__(v)) ? \
+ (unsigned long) (long) (v) : \
+ (unsigned long) (v))
+
+#if defined (__GNUC__) \
+ && ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 5) \
+ || __GNUC__ >= 5)
+#define CDS_DEPRECATED(msg) \
+ __attribute__((deprecated(msg)))
+#else
+#define CDS_DEPRECATED(msg) \
+ __attribute__((deprecated))
+#endif
+
+#define CAA_ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+
+/*
+ * Don't allow compiling with buggy compiler.
+ */
+
+#ifdef __GNUC__
+# define URCU_GCC_VERSION (__GNUC__ * 10000 \
+ + __GNUC_MINOR__ * 100 \
+ + __GNUC_PATCHLEVEL__)
+
+/*
+ * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854
+ */
+# ifdef __ARMEL__
+# if URCU_GCC_VERSION >= 40800 && URCU_GCC_VERSION <= 40802
+# error Your gcc version produces clobbered frame accesses
+# endif
+# endif
+#endif