EVENTS_OBJ="lib/events/events.o lib/events/events_select.o lib/events/events_signal.o lib/events/events_timed.o lib/events/events_standard.o" AC_CHECK_HEADERS(sys/epoll.h) AC_CHECK_FUNCS(epoll_create) if test x"$ac_cv_header_sys_epoll_h" = x"yes" -a x"$ac_cv_func_epoll_create" = x"yes"; then EVENTS_OBJ="$EVENTS_OBJ lib/events/events_epoll.o" AC_DEFINE(HAVE_EVENTS_EPOLL, 1, [Whether epoll available]) fi AC_SUBST(EVENTS_OBJ)