Font path in QTE cross-compilation and installation

Configuring qt-everywhere in a cross-compilation environment requires the prefix to be set to the actual installation path on the host machine, else qmake doesn't find tools and libs because it's looking for them in the (hardcoded) prefix path, and furthermore providing a relocation path for the libraries: "-prefix <local_qt_install_dir> -R /usr/local".
In this case the path to the font lib is hardcoded into the libs as "<local_qt_install_dir>/lib/fonts/" and needs to be overridden by an appropriate qt.conf for the apps on the target. Alternatively qte can be configured with the target prefix, and an appropriate qt.conf must be provided in the bindir on the host.
I suggest to either make the font path configurable separately (option "-fontdir <dir>"), or using the path given with the -R option by default, so a qt.conf isn't necessary. Otherwise this issue must be covered in the docs for qte cross-compilation to avoid hours of research and trial-and-error.