pcb depends on tcl/tk and this is not reflected in the ebuild Reproducible: Always Steps to Reproduce: 1. 2. 3. the pcb ebuilds need to be depending on tcl/tk
Created attachment 25458 [details, diff] pcb patch to include depend tcl/tk
Looks like tk is just a build time dependency. It happily starts when both aren't installed. It does not need tcl at all as far as I can see. Thanks for the hint anyway, corrected version should be in portage soon.
Fixed for good with optional tk in pcb-20080202. The only thing that actually depends on tk is the Quad Flat Package viewer. Denis.