wvstreams needs qt3 and won't work with qt4. Its build system as a little bug that will broke the compilation. It's also different from the current kde one that will find automatically the right qt to use sowe have to force it. Here there's a patch for the build system and a patch for the latest ebuild. Please review. Thanks.
Created attachment 52729 [details, diff] files/wvstreams-4.0.1-MOC-fix.patch Use $(MOC) instead of the wrong hardcoded "moc".
Created attachment 52730 [details, diff] wvstreams-4.0.1-r1.ebuild.patch
Created attachment 52732 [details, diff] wvstreams-4.0.1-r1.ebuild.patch Also set --without-qt if USE qt is disabled.
fixed in 4.0.1-r2
Thanks a lot. Also noticed that you already fixed the depency issue that I forgot to fix.