On Apr 11, 2015, at 5:13 AM, René J.V. Bertin wrote:

> On Friday April 10 2015 17:28:24 Ryan Schmidt wrote:
> 
>> If you use default prefix, and use default variants for most ports, you'll 
>> get binaries for many of them, so if your internet connection is reasonably 
>> fast,
> 
> I have wine installed, which means I get a ****load of universal variants 
> that I would otherwise be able to avoid, including a number of big ones like 
> ffmpeg and gtk . KDE ports provide their documentation through a variant, so 
> most of those will be built from source too (even those I don't run personal 
> versions of). So I have everything to gain by any kind of possibility that 
> would allow me to prepare the migration as far as that's possible.
> 
>> take stock of the ports you've installed any maybe cull some you don't need 
>> anymore.
> 
> I do that periodically when I see the footprint on disk. It's rare though 
> that I can really cull anything that makes a difference. 
> 
>> I'm not going to discuss ways of circumventing the migration strategy.
> 
> I'm not planning to circumvent the underlying principle of rebuilding, just 
> trying to find out to what extent rebuilding against the newer SDK can be 
> done "prematurely", spreading out the computing time and resources, and 
> evidently not with ports that contain OS-specific code, variants or whatever.
> 
> I did this step for the 10.6 -> 10.9 upgrade in a VM ... I'll probably be 
> adapting to 10.10 in a VM too (for lack of a 2nd Mac or Hackintosh) and just 
> might see how far I'll get with applying the migration guide step by step, as 
> part of a selfupdate (which I haven't been doing since january or so...)

I don't know that you can pre-build things for 10.10 while still on 10.9. Not 
in a way that I'm prepared to provide support for, anyway. What you can do 
though is upgrade ports one at a time after you upgrade to 10.10, instead of 
uninstalling them all and then reinstalling them all. This can lead to 
problems, but if you're aware of that and do it the right way (upgrade ports in 
dependency order) and know what to do when you encounter errors, it can work; 
it's what I did. Software built on 10.9 largely works fine on 10.10, so you can 
still use most of your old ports until you rebuild them. I still have a few 
ports installed on 10.10 that were built for 10.9 -- mostly those that cannot 
be built on 10.10 right now.

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