For the most part, the steps here can be followed. However, there are a few important differences:
We don't need all the qt modules, so run init_command.sh
in order to init just the qt dependencies that the wombat has.
The symlinks do not work regularly by just doing symlinks
as it says on the tutorial. Instead, you will have to
run fix-symlinks.sh
In order to configure the pi build, don't use the configure
script inside the qt directory. Instead, use the
configure-pi.sh script provided.
When cross compiling with gcc and g++, linking may not go as planned and you may end up with errors due to mismatched libc and libstdc++ when dlopen is called. For this reason, clang is recommended. Thus, use the provided toolchain.cmake in order to use clang instead of the one on the website (for gcc/g++)