require 'mkmf' have_header('sys/epoll.h') or abort 'sys/epoll.h not found' have_header("pthread.h") or abort 'pthread.h not found' have_header('sys/eventfd.h') have_header('sys/signalfd.h') have_header('sys/timerfd.h') have_func('rb_memerror') have_func('rb_io_close') have_func('epoll_create1', %w(sys/epoll.h)) have_func('rb_thread_blocking_region') have_library('pthread') dir_config('sleepy_penguin') create_makefile('sleepy_penguin_ext')