Man, I need Buildroot to only rebuild Qt. No sure how to do that. What I ended up doing was using the emptypackage config, add in the toolchain and then qt. Then have it make from there.
Then to change the -prefix, I had to edit the source code:
and manually edited the -prefix option.
That’d be nice to customizable. That’d be nice feature to do for the community. It’d be a first, though I’d have to figure out the entire flow works, like from menuconfig downward. Let me tag this. Actually the experience with adding in g_ncm helped now that I think about it.