port upgrade outdated order

[René J.V. Bertin]

On Tuesday March 03 2015 19:00:16 Lawrence Velázquez wrote:

> >> note that trace mode fixes this ;-)
> > 
> > How so?
> 
> By masking files that aren't part of the operating system, Xcode, or port dependencies.

Hmmm, can't say the term "trace" evokes that for me :)

I think I understood that ports can opt out from this mode, no? Can they also activate it?

R.