From owner-freebsd-ports@freebsd.org  Wed Oct 28 13:19:49 2015
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Subject: Re: How to make a port require at least one option?
To: "A.J. \"Fonz\" van Werven" <freebsd@skysmurf.nl>,
 FreeBSD ports mailing list <freebsd-ports@freebsd.org>
References: <20151028114204.GA97395@biertje.skysmurf.nl>
From: Torsten Zuehlsdorff <mailinglists@toco-domains.de>
Message-ID: <5630CB73.2050803@toco-domains.de>
Date: Wed, 28 Oct 2015 14:19:47 +0100
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Hello Fonz,

> I'm working on a port that has two options, of which at least one must be
> selected, but selecting both is OK too. Can somebody please point me to an
> existing port (surely there must be some already) that has this, so I can
> see how to use the options framework in this case?

Have a look at:
https://www.freebsd.org/doc/en/books/porters-handbook/makefile-options.html

Chapter 5.12.1.2. Syntax. You are looking for multiple-choice.

Ports are for example (randomly picked):
- www/testlink
- audio/libmp3splt
- net/asterisk13

Greetings,
Torsten