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?RCS: $Id: d_poll.U 167 2013-05-08 17:58:00Z rmanfredi $
?RCS:
?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi
?RCS:
?RCS: You may redistribute only under the terms of the Artistic License,
?RCS: as specified in the README file that comes with the distribution.
?RCS: You may reuse parts of this distribution only within the terms of
?RCS: that same Artistic License; a copy of which may be found at the root
?RCS: of the source tree for dist 4.0.
?RCS:
?RCS: $Log: d_poll.U,v $
?RCS: Revision 3.0.1.2 1997/02/28 15:38:17 ram
?RCS: patch61: mention that <poll.h> can be included if HAS_POLL defined
?RCS:
?RCS: Revision 3.0.1.1 1995/01/11 15:26:31 ram
?RCS: patch45: created
?RCS:
?MAKE:d_poll: Trylink cat i_poll i_syspoll
?MAKE: -pick add $@ %<
?S:d_poll:
?S: This variable conditionally defines the HAS_POLL symbol, which
?S: indicates to the C program that the poll() routine is available
?S: to poll active file descriptors.
?S:.
?C:HAS_POLL :
?C: This symbol, if defined, indicates that the poll routine is
?C: available to poll active file descriptors. Please check I_POLL and
?C: I_SYS_POLL to know which header should be included as well.
?C:.
?H:#$d_poll HAS_POLL /**/
?H:.
?LINT:set d_poll
: see if poll exists
$cat >try.c <<EOC
#include <sys/types.h>
#$i_syspoll I_SYS_POLL
#ifdef I_SYS_POLL
#include <sys/poll.h>
#endif
#$i_poll I_POLL
#ifdef I_POLL
#include <poll.h>
#endif
int main(void)
{
static int ret, timeout;
static unsigned n;
static struct pollfd pfd;
pfd.fd |= 1;
pfd.revents |= 1;
pfd.events |= POLLIN;
pfd.events |= POLLOUT;
pfd.events |= POLLPRI;
pfd.events |= POLLERR;
pfd.events |= POLLHUP;
pfd.events |= POLLNVAL;
ret |= poll(&pfd, n, timeout);
return ret ? 0 : 1;
}
EOC
cyn=poll
set d_poll
eval $trylink
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