-AC_CHECK_FUNCS(poll,,
- [AC_CHECK_FUNCS(select,,
- AC_MSG_ERROR([neither poll() nor select() is supported!]))
+AC_CHECK_FUNCS(poll,[AC_CHECK_HEADER(sys/poll.h)],
+ [AC_CHECK_FUNCS(select,[AC_CHECK_HEADER(sys/select.h)],
+ AC_MSG_ERROR([neither poll() nor select() is available!]))