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- # ===========================================================================
- # https://www.gnu.org/software/autoconf-archive/ax_sys_dev_poll.html
- # ===========================================================================
- #
- # SYNOPSIS
- #
- # AX_SYS_DEV_POLL([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
- #
- # DESCRIPTION
- #
- # 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.
- #
- # LICENSE
- #
- # Copyright (c) 2008 Dave Benson <daveb@ffem.org>
- #
- # Copying and distribution of this file, with or without modification, are
- # permitted in any medium without royalty provided the copyright notice
- # and this notice are preserved. This file is offered as-is, without any
- # warranty.
-
- #serial 6
-
- AU_ALIAS([AC_SYS_DEV_POLL], [AX_SYS_DEV_POLL])
- AC_DEFUN([AX_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]
- )
- )
- ])
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