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AC_SYS_DEV_POLL([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
1.1 (2001/07/26) Miscellaneous @ ac-archive-0.5.39
Dave Benson <daveb@ffem.org>
This macro tests for the presence of /dev/poll support in the build environment. It checks that the needed structure (dvpoll) is available, with the standard fields. /dev/poll is most often seen under Solaris.
Note that it does not attempt to actually open /dev/poll -- you should test for errors when you open it and then fall back to poll() if it is unavailable.
AC_DEFUN(AC_SYS_DEV_POLL, [AC_CACHE_CHECK(for /dev/poll support, ac_cv_dev_poll, AC_TRY_COMPILE([#include <sys/ioctl.h> #include <sys/stat.h> #include <sys/types.h> #include <sys/poll.h> #include <sys/devpoll.h>], [ struct dvpoll p; p.dp_timeout = 0; p.dp_nfds = 0; p.dp_fds = (struct pollfd *) 0; return 0; ], ac_cv_dev_poll=yes [$1], ac_cv_dev_poll=no [$2] ) ) ])