AC_CHECK_FUNCS([usleep select socket inet_pton inet_ntop])
AC_CHECK_HEADERS([fcntl.h sys/socket.h sys/select.h sys/time.h sys/types.h unistd.h windows.h winsock2.h errno.h sys/epoll.h sys/event.h])
AC_CHECK_FUNCS([usleep select socket inet_pton inet_ntop])
AC_CHECK_HEADERS([fcntl.h sys/socket.h sys/select.h sys/time.h sys/types.h unistd.h windows.h winsock2.h errno.h sys/epoll.h sys/event.h])