Use ${CKSUM} rather than cksum if the former's defined.

distrib/sets/makesums

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# $NetBSD: makesums,v 1.2 2000/08/20 08:29:59 toddpw Exp $
+# $NetBSD: makesums,v 1.3 2002/03/31 15:17:58 bjh21 Exp $
 #
 # Make checksum files for files in ``tardir''.  Usage:
 # makesums [-t tardir] [ -all ] [setname ...]
@@ -18,6 +18,7 @@
 #
 
 # set defaults
+: ${CKSUM=cksum}
 : ${MAKE=make}	# XXX: what purpose does this serve??
 tars=$RELEASEDIR
 dash_all=no
@@ -62,8 +63,8 @@ elif [ -z "$pat" ]; then
 fi
 lists=`find $pat -prune -type f \! -name '*SUM' \! -name MD5 2>/dev/null`
 if [ -n "$lists" ]; then
-	cksum -o1 $lists > BSDSUM
-	cksum     $lists > CKSUM
-	cksum -m  $lists > MD5
-	cksum -o2 $lists > SYSVSUM
+	${CKSUM} -o1 $lists > BSDSUM
+	${CKSUM}     $lists > CKSUM
+	${CKSUM} -m  $lists > MD5
+	${CKSUM} -o2 $lists > SYSVSUM
 fi