amd64 buildworld lib32 flags fail

Hi

I have some amd64 systems that fail cleaning up lib32 and some that
don't.  I have to chflags noschg these files before starting a
buildworld.  I can't figure out what the difference is between the
systems that work and those that don't.

--------------------------------------------------------------
>>> Rebuilding the temporary build tree
--------------------------------------------------------------
rm -rf /usr/obj/usr/src/tmp
rm -rf /usr/obj/usr/src/lib32
rm: /usr/obj/usr/src/lib32/usr/lib32/libc.so.7: Operation not permitted
rm: /usr/obj/usr/src/lib32/usr/lib32/libcrypt.so.5: Operation not permitted
rm: /usr/obj/usr/src/lib32/usr/lib32/libthr.so.3: Operation not permitted
rm: /usr/obj/usr/src/lib32/usr/lib32/librt.so.1: Operation not permitted
rm: /usr/obj/usr/src/lib32/usr/lib32: Directory not empty
rm: /usr/obj/usr/src/lib32/usr: Directory not empty
rm: /usr/obj/usr/src/lib32: Directory not empty
*** [_worldtmp] Error code 1

Ian

-- 
Ian Freislich