Include <sys/eventfd.h> as needed

configure.ac

@@ -795,7 +795,7 @@ AC_EGREP_HEADER(strncasecmp,strings.h,[
 dnl Check for headers
 AC_CHECK_HEADERS(signal.h time.h errno.h stdint.h stdbool.h getopt.h strings.h inttypes.h sys/int_types.h wchar.h locale.h)
 AC_CHECK_HEADERS(sys/sockio.h fcntl.h sys/types.h sys/time.h sys/times.h sys/ioctl.h sys/stat.h xlocale.h)
-AC_CHECK_HEADERS([arpa/inet.h netinet/in.h netinet/udplite.h])
+AC_CHECK_HEADERS([arpa/inet.h netinet/in.h netinet/udplite.h sys/eventfd.h])
 AC_CHECK_HEADERS([net/if.h], [], [],
   [
     #include <sys/socket.h>

src/misc/objects.c

@@ -62,6 +62,9 @@
 # include <fcntl.h>
 # include <errno.h> /* ENOSYS */
 #endif
+#ifdef HAVE_SYS_EVENTFD_H
+# include <sys/eventfd.h>
+#endif
 #include <assert.h>
 
 /*****************************************************************************