#define CAA_ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
-#ifdef __GNUC__
+/*
+ * URCU_GCC_VERSION is used to blacklist specific GCC versions with known
+ * bugs, clang also defines these macros to an equivalent GCC version it
+ * claims to support, so exclude it.
+ */
+#if defined(__GNUC__) && !defined(__clang__)
# define URCU_GCC_VERSION (__GNUC__ * 10000 \
+ __GNUC_MINOR__ * 100 \
+ __GNUC_PATCHLEVEL__)
#endif
+#ifndef __cplusplus
+#define caa_c_transparent_union __attribute__((__transparent_union__))
+#else
+#define caa_c_transparent_union
+#endif
+
#endif /* _URCU_COMPILER_H */