Quick fixes for the mtree bootstrap:

- don't announce `mtree' as `mtools'.
- don't install to ${DESTDIR}/usr/sbin (which often doesn't exist if
  DESTDIR is set and may be read-only if DESTDIR is not set).
- install to (${WORLDTMP}/usr/sbin so that the new mtree is actually
  in $PATH if DESTDIR is set.
- don't use the host make or the host sys.mk.  This is probably
  unimportant.
- use a temporary obj dir like the one for `make'.  This was mainly
  necessary because I forgot to remove the MAKEOBJDIRPREFIX unsetting
  which was just a bug for mtree.  A non-quick fix would handle mtree
  more like a bootstrap tool (the only additional complications are to
  create ${BINDIR} and avoid excessive cleaning).  Except a non-quick
  fix would change much more.

Makefile

@@ -1,5 +1,5 @@
 #
-#	$Id: Makefile,v 1.199 1998/06/06 04:39:41 jkoshy Exp $
+#	$Id: Makefile,v 1.200 1998/06/07 10:50:28 sos Exp $
 #
 # While porting to the another architecture include the bootstrap instead
 # of the normal build.
@@ -257,14 +257,15 @@ buildworld:
 	)
 	@echo
 	@echo "--------------------------------------------------------------"
-	@echo " Making mtools"
+	@echo " Making mtree"
 	@echo "--------------------------------------------------------------"
+	mkdir -p ${WORLDTMP}/usr/sbin ${WORLDTMP}/mtree
 	( \
 	cd ${.CURDIR}/usr.sbin/mtree; \
 		MAKEOBJDIRPREFIX=""; unset MAKEOBJDIRPREFIX; \
-		${MAKE} -I${.CURDIR}/share/mk ${MK_FLAGS} all; \
-		${MAKE} -I${.CURDIR}/share/mk ${MK_FLAGS} install; \
-		${MAKE} -I${.CURDIR}/share/mk ${MK_FLAGS} clean \
+		export MAKEOBJDIR=${WORLDTMP}/mtree; \
+		${BMAKE} ${MK_FLAGS} all; \
+		${BMAKE} ${MK_FLAGS} -B install clean \
 	)
 .endif
 	@echo