I forgot to mention these in the description.
I used Qt 3.3.8 - probably any Qt 3.xx would be okay.
I have ivtv-1.0.2 - you probably need that, an old version *might* work, though.
You need ALSA or you need to modify the code to use something other than 'aplay' to play the sound.
That should be everything.
Not updated since 2003
This project hasn't been updated since 2003, it's built against old libraries, and even in 2003 it only had the bare minimum of features. It seems fairly clear that development for this project has ceased, and if you want to use Yahoo for IM your best bet is to go with Kopete or GAIM. Kopete is supposed to have audio/video chatting, but I can't seem to get it working, and GAIM works nicely and supports no audio or video chatting. Either of them work far better than the ancient linux version of Yahoo Messenger for connecting to Yahoo. It's too bad that the people at Yahoo have given up on us, but it seems like we must just accept it and move on.