HAVE_SYS_SELECT_H   64 eval_intern.h  #ifdef HAVE_SYS_SELECT_H
HAVE_SYS_SELECT_H   64 ext/socket/rubysocket.h #  ifdef HAVE_SYS_SELECT_H
HAVE_SYS_SELECT_H  129 include/ruby/defines.h #ifdef HAVE_SYS_SELECT_H
HAVE_SYS_SELECT_H 8382 io.c           #ifdef HAVE_SYS_SELECT_H