POSIX conformance of ls -l -1

[Mikoláš Janota]

For the command ls, the POSIX standard, says that "When -l (ell) is
specified, -1 (one) shall be assumed."
(http://www.opengroup.org/onlinepubs/000095399/utilities/ls.html)

In the FreeBSD implementation, however, -1 and -l override one
another. I can't see how this could be POSIX compliant.

I'm on Mac OS X which I believe is using FreeBSD port and the man page
claims POSIX compliance. Where can I find more information about this?

-- 
Mikoláš Janota M. Sc.
School of Computer Science and Informatics,
University College Dublin,
Belfield,
Dublin 4,
Ireland