#include <urcu/compiler.h>
+#ifndef __SIZEOF_LONG__
+#if defined(__x86_64__) || defined(__amd64__)
+#define __SIZEOF_LONG__ 8
+#else
+#define __SIZEOF_LONG__ 4
+#endif
+#endif
+
#ifndef BITS_PER_LONG
#define BITS_PER_LONG (__SIZEOF_LONG__ * 8)
#endif