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?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
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