`-v'
====

   Print version information on standard error and then exit.  The
output is of the form:

     amd 5.2.1.11 of 91/03/17 18:04:05 5.3Alpha11 #0: Sun Mar 17 18:07:28 GMT 1991
     Built by pendry@vangogh.Berkeley.EDU for a hp300 running bsd44 (big-endian).
     Map support for: root, passwd, union, file, error.
     FS: ufs, nfs, nfsx, host, link, program, union, auto, direct, toplvl, error.
     Primary network is 128.32.130.0.

   The information includes the version number, release date and name of
the release.  The architecture (*note Supported Machine
Architectures::.), operating system (*note Supported Operating
Systems::.) and byte ordering are also printed as they appear in the
`${os}', `${arch}' and `${byte}' variables.