I thought it was possible to turn on and off the debug output easily with a compile time flag but I guess not.

The QT 3 docs say that the QT_DEBUG flag "Enables debugging code" and that the QT_NO_DEBUG flag turns off the QT_DEBUG flag. So I guess I don't know what exactly that means.

Anyway, I've created a macro that expands to qDebug, and it works fine.

Thanks to you both,

Derek