pkg and mpkg

[Bradley Giesbrecht]

On Feb 7, 2010, at 11:09 PM, Michael Crawford wrote:

> On Sun, Feb 7, 2010 at 12:37 PM, Joshua Root <jmr at macports.org> wrote:
>> Portfiles are Turing complete, so yes, you can in principle install
>> however you like. It seems strange that the software would be able to
>> build against the 10.4 SDK but not actually on < 10.6 though.
>
> One can build software that uses 10.6 features if they are present,
> but is still compatible with 10.4 and 10.5 provided one doesn't try to
> use features that they didn't support.
>
> The way this works is that the dynamic linker will set some of the
> system framework function pointers to NULL if they aren't supported by
> the framework.  So it is up to the developer to check the function
> pointers before actually using them.
>
> I don't know how it would be handled with MacPorts, but with Xcode
> projects one can specify different major releases for the SDK and for
> the deployment target.

Thanks for the help and explanations. Just found out here is already a  
macports port for what I wanted so it's on to other things :)

  port search tuntaposx
tuntaposx @20090913 (net)
     Tun and tap virtual devices.

// Brad