Definitely did not touch on the linking toolchain in the CS101 I did. I ended up having to figure that out the hard way through Linux From Scratch builds and co

Definitely did not touch on the linking toolchain in the CS101 I did. I ended up having to figure that out the hard way through Linux From Scratch builds and cobbling together weird symbol resolution environments based on wanting to do things in my own idiosyncratic way. Ghidra helps a lot these days. ldd and the other linker/binutils do the rest.