My OpenADK build has come so far, that I am disabling packages that fail to build due to the build being fully static and the Makefile not accounting for that. Meaning, the brunt of configuring is done - I just have to keep substracting out the bad ones, and then I get my rootfs.

This is going veeeeery well ^_^

Also! OpenADK > Buildroot. Stupidly simple and can be configured with many options in a great structure. If you ever need to build yourself a cross-compile toolchain - OpenADK has your back. Genuely amazing.