+AC_CHECK_DECL([cds_wfq_init], [],
+ [AC_MSG_ERROR([liburcu $liburcu_version or newer is needed])], [[#include <urcu/wfqueue.h>]]
+)
+
+AC_CHECK_DECL([futex_async], [],
+ [AC_MSG_ERROR([liburcu $liburcu_version or newer is needed])], [[#include <urcu/futex.h>]]
+)
+
+AX_HAVE_EPOLL(
+ [AX_CONFIG_FEATURE_ENABLE(epoll)],
+ [AX_CONFIG_FEATURE_DISABLE(epoll)]
+)
+
+AX_CONFIG_FEATURE(
+ [epoll], [This platform supports epoll(7)],
+ [HAVE_EPOLL], [This platform supports epoll(7).],
+ [enable_epoll="yes"], [enable_epoll="no"]
+)
+
+AM_CONDITIONAL([COMPAT_EPOLL], [ test "$enable_epoll" = "yes" ])