I don’t, but I had seen a specfile (that I *should* have grabbed somewhere) that awked out the path to howl automagically. Might google for mt-daapd.spec, and see if you can find it. It looked like a winner.
If I run across it again, I’ll probably steal (i.e. borrow + credit) the thing to drop in the contrib (and to build from)
that’s the one I was looking for. That looks pretty close to right, except for the case where it’s in /usr/include/howl, rather than /usr/include/howl-ver