AC_CHECK_DECL([cds_wfq_init], [],
[AC_MSG_ERROR([liburcu $liburcu_version or newer is needed])], [[#include <urcu/wfqueue.h>]]
)
+AC_CHECK_DECL([cds_wfq_dequeue_blocking], [],
+ [AC_MSG_ERROR([liburcu $liburcu_version or newer is needed])], [[#include <urcu/wfqueue.h>]]
+)
AC_CHECK_DECL([futex_async], [],
[AC_MSG_ERROR([liburcu $liburcu_version or newer is needed])], [[#include <urcu/futex.h>]]
)