icon-theme.cache and Apps Using GTK

[Jeremy Lavergne]

As mentioned recently, pspp-devel creates a cache file by running
gtk-update-icon-cache after installing its application icons. This file is
manipulated across several ports, none of which should own it.

Is adding this command to activate phase of every package with GTK icons
what we want to do?

Seems MacPorts itself would be better suited to updating the cache file
after an install, provided gtk is installed [1]. Is routinely running
gtk-update-icon-cache something we might consider adding to base or
perhaps a gtk portgroup?

 [1] http://forums.gentoo.org/viewtopic-t-318622.html