extconf.rb in sleepy_penguin-3.1.0

- old
+ new

@@ -1,15 +1,19 @@
 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')
+
+# it's impossible to use signalfd reliably with Ruby since Ruby currently
+# manages # (and overrides) all signal handling
+# have_header('sys/signalfd.h')
+
 have_header('sys/timerfd.h')
 have_header('sys/inotify.h')
-have_header('sys/signalfd.h')
 have_header('ruby/io.h') and have_struct_member('rb_io_t', 'fd', 'ruby/io.h')
 have_func('epoll_create1', %w(sys/epoll.h))
 have_func('rb_thread_blocking_region')
 have_func('rb_thread_io_blocking_region')
 have_func('rb_thread_fd_close')
+have_func('rb_update_max_fd')
 have_library('pthread')
 create_makefile('sleepy_penguin_ext')