?RCS: $Id: d_sysctl.U 167 2013-05-08 17:58:00Z rmanfredi $
?RCS:
?RCS: Copyright (c) 2006, Christian Biere
?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:
?MAKE:d_sysctl: Trylink cat
?MAKE:	-pick add $@ %<
?S:d_sysctl:
?S:	This variable conditionally defines the HAS_SYSCTL symbol, which
?S:	indicates to the C program that the sysctl() routine is available.
?S:.
?C:HAS_SYSCTL:
?C:	This symbol, if defined, indicates that the sysctl routine is
?C:	available.
?C:.
?H:#$d_sysctl HAS_SYSCTL		/**/
?H:.
?LINT:set d_sysctl
: see if sysctl exists
$cat >try.c <<EOC
#include <sys/param.h>
#include <sys/sysctl.h>
int main(void)
{
	static int ret, name;
	static unsigned int namelen;
	static void *oldp, *newp;
	static size_t oldlen, newlen;
	ret |= sysctl(&name, namelen, oldp, &oldlen, newp, newlen);
	return ret ? 0 : 1;
}
EOC
cyn=sysctl
set d_sysctl
eval $trylink