From PR submitter:

From PR submitter:

 compress uses setfile() to make flags, ownership and mode of the output
 the same as those of the original. However, if the filesystem holding the
 output file doesn't support these operations, compress prints a warning.
 This bites a bit with NFS directories, which always fail the chflags()
 operation. If the file system doesn't support the operation, then the
 flags data wasn't valid on the original file anyway, so the warning is
 spurious.

Submitted by:	bin/16981 (Peter Edwards <peter.edwards@ireland.com>)