8 GNU) DEVDEVICE="/dev/random" ;;
9 *) DEVDEVICE="/dev/zero" ;;
20 Darwin) MD5SUM="md5 -r" ;;
21 FreeBSD) MD5SUM="gmd5sum" ;;
22 NetBSD) MD5SUM="md5 -n" ;;
23 OpenBSD) MD5SUM="md5" ;;
29 SunOS) DIFF="gdiff" ;;
32 if echo hello | zstd -v -T2 2>&1 > $INTOVOID | grep -q 'multi-threading is disabled'