Migrating to Yosemite---cannot run 'port -qv installed' after OS upgrade

[Jeremy Lavergne]

If there's a missing dependency that's used, upgrade will pull in files from the old (possibly broken) packages to build new ones. 

Uninstalling everything first then building, or using trace mode for upgrade, eliminates this possibility.

On Oct 19, 2014, at 3:00 PM, Carlo Tambuatco wrote:

> So uninstalling and reinstalling as people suggested before would only
> replicate those useless ports again...so functionally, how is
> what I did (using sudo port -u upgrade outdated) different from
> uninstall/reinstalling everything? And how is it going to change the
> situation of my ports that fail to build?