- AC_CHECK_FUNCS(poll, x_io_backend=poll\(\),
- AC_MSG_ERROR([Can't enable poll IO support!])
+ AC_CHECK_FUNCS(poll,
+ AC_CHECK_HEADERS(poll.h,
+ x_io_backend=poll\(\),
+ AC_MSG_ERROR(
+ [Can't enable poll IO support!])
+ ,
+ AC_MSG_ERROR(
+ [Can't enable poll IO support!])
+ )