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-rw-r--r--ext/sleepy_penguin/extconf.rb4
1 files changed, 3 insertions, 1 deletions
diff --git a/ext/sleepy_penguin/extconf.rb b/ext/sleepy_penguin/extconf.rb
index 126a305..c29b35d 100644
--- a/ext/sleepy_penguin/extconf.rb
+++ b/ext/sleepy_penguin/extconf.rb
@@ -1,6 +1,8 @@
 require 'mkmf'
 have_header('sys/epoll.h') or abort 'sys/epoll.h not found'
-have_header('sys/select.h')
+have_header('sys/eventfd.h')
+have_header('sys/signalfd.h')
+have_header('sys/timerfd.h')
 have_func('epoll_create1', %w(sys/epoll.h))
 have_func('rb_thread_blocking_region')
 dir_config('sleepy_penguin')