?RCS: $Id: d_semctl.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_semctl.U,v $
?RCS: Revision 3.0  1993/08/18  12:07:04  ram
?RCS: Baseline for dist 3.0 netwide release.
?RCS:
?MAKE:d_semctl: Trylink cat
?MAKE:	-pick add $@ %<
?S:d_semctl:
?S:	This variable conditionally defines the HAS_SEMCTL symbol, which
?S:	indicates to the C program that the semctl() routine is available.
?S:.
?C:HAS_SEMCTL:
?C:	This symbol, if defined, indicates that the semctl() routine is
?C:	available to perform semaphore control operations.
?C:.
?H:#$d_semctl HAS_SEMCTL	/**/
?H:.
?LINT:set d_semctl
: see if semctl exists
$cat >try.c <<EOC
#include <sys/sem.h>
int main(void)
{
	static int ret, id, num;
	static union semun {
		int val;
		struct semid_ds *buf;
		unsigned short  *array;
	} arg;
	ret |= semctl(id, num, GETVAL, &arg);
	ret |= semctl(id, num, SETVAL, &arg);
	ret |= semctl(id, num, GETPID, &arg);
	ret |= semctl(id, num, GETNCNT, &arg);
	ret |= semctl(id, num, GETZCNT, &arg);
	ret |= semctl(id, num, GETALL, &arg);
	ret |= semctl(id, num, SETALL, &arg);
	return ret ? 0 : 1;
}
EOC
cyn=semctl
set d_semctl
eval $trylink