Hi, a new version of the above package is available. Here's a working ebuild with two patch that fixes two issues. This version have switched the building system to CMake.
Created attachment 145308 [details] kwave-0.7.11.ebuild
Created attachment 145310 [details, diff] kwave-0.7.11-disable_arts.patch
Created attachment 145312 [details, diff] kwave-0.7.11-fix_audiofile.patch
Hm this thing is in the tree. So closing this one :] Thanks for bug anyway :]