Creating port with options

Kris Kennaway kris at
Mon Apr 11 14:19:28 PDT 2005

On Mon, Apr 11, 2005 at 05:55:26PM -0300, Alejandro Pulver wrote:
> Hello,
> I am creating a port of the Core War system pMARS (the existent port is
> version 0.8, lastest is 0.9.2), and I will allow the user to choose the
> GUI and features. I have some questions:
> How can I "document" the options for the user?
> So that typing "make" will not do anything unless it has the required
> options (or it will use the defaults but first shows the available
> options). Will be possible for the user to store the configuration
> somwehere? Wich is the best way to show the user the options (before
> the building process)?
> P.S.: how do ports show the sysinstall-like dialog to choose options?

With the OPTIONS variable; please see the porters' handbook and

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