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+?RCS: $Id: d_arc4random.U 167 2013-05-08 17:58:00Z rmanfredi $
+?RCS: Copyright (c) 2006, Christian Biere
+?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.
+?MAKE:d_arc4random: Trylink cat i_stdlib
+?MAKE: -pick add $@ %<
+?S: This variable conditionally defines the HAS_ARC4RANDOM symbol, which
+?S: indicates to the C program that the arc4random() routine is available.
+?C: This symbol, if defined, indicates that the arc4random routine is
+?C: available.
+?H:#$d_arc4random HAS_ARC4RANDOM /**/
+?LINT:set d_arc4random
+: see if arc4random exists
+$cat >try.c <<EOC
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+int main(void)
+ static unsigned long ret;
+ ret |= arc4random();
+ return 0 != ret;
+set d_arc4random
+eval $trylink