HAVE_POLL          31 include/ruby/io.h #if defined(HAVE_POLL)
HAVE_POLL        10084 io.c           #if defined(HAVE_POLL) && defined(__linux__)
HAVE_POLL        3772 thread.c       #if defined(HAVE_POLL) && defined(__linux__)
HAVE_POLL          67 thread_pthread.c #if defined(HAVE_POLL) && defined(HAVE_FCNTL) && defined(F_GETFL) && defined(F_SETFL) && defined(O_NONBLOCK) && !defined(__native_client__)