xar(1) on macOS
The text b22d7dfefce9, as Mac OS X 10.5.8, Mac OS X 10.5.7, Mac OS X 10.5.6, Mac OS X 10.5.5, Mac OS X 10.5.4, Mac OS X 10.5.3, Mac OS X 10.5.2, Mac OS X 10.5.1, Mac OS X 10.5 shipped it.
eXtensible ARchiver
Flags it lists
-
--coalesce-heap -
--compression -
--dump-header -
--dump-toc -
--exclude -
--link-same -
--list-subdocs -
--no-compress -
--rsize -
--toc-cksum -
-P -
-l -
-p -
-s -
-v