kconvert-1.1 contains the "need-qt 3" function call, but kconvert cannot build with qt alone. It is a kde app and so need-kde should be specified. Also, "dodoc INSTALL COPYING README TODO" installs some redundant files: -COPYING can be found in ${PORTDIR}/licenses/GPL-2 -README and TODO are empty files.
Please have a look at kde-misc how kde application ebuilds should be done. Usually you don't need to call any src_* functions. I'd like also to point out that - while the approach is broken and will change - need-qt/kde functions have always to be called after R/DEPEND.
Please check out kconvert-1.1-r1. I have fixed it to use the kde.eclass, call need-kde 3, and also to build with -arts. As there are quite a few changes I have revision bumped it. Unfortunately COPYING and INSTALL are still installed - it appears that the kde.eclass does this, and so I cannot rectify that issue.
Correction - only COPYING is installed now. Not sure why that is still installed though. The other files should be installed as they may be used in future versions if they are released.
