How to make a port require at least one option?

[Torsten Zuehlsdorff]

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