dnl ### Check for poll() AC_DEFUN([XDVI_FUNC_POLL], [AC_CACHE_CHECK([for poll.h and poll()], xdvi_cv_func_poll, [AC_TRY_LINK( [#include ], [poll((struct pollfd *) 0, 0, 0);], xdvi_cv_func_poll=yes, xdvi_cv_func_poll=no)]) if test $xdvi_cv_func_poll = yes; then AC_DEFINE([HAVE_POLL], 1, [Define if your system has and poll().]) else AC_CHECK_HEADERS(sys/select.h select.h) fi])