Quoting Brian D Chase,

> --
>  atari-vax# make install
>  install -c -o bin -g bin -m 600 libc.a  /usr/lib
>  install: /usr/lib/libc.a: chflags: Operation not supported
>  *** Error code 1

Install should only print a warning about that, if it exits because
of the chflags error you must have an older xinstall.c version.

- Frank