port variants

[Chris Inacio]

Hello all,

I was recently asked to do some FreeBSD ports support work.  I mostly use a
Mac and the MacPorts system.  MacPorts has the concept of a variant for a
port, but I can't find the analogue in the FreeBSD system.

Does the FreeBSD ports system have the concept of a variant?  If so, can
someone point me in the right direction on how to create one?

Thanks,
Chris Inacio