Help with cross-compiling tools?

I've been reading and reading and... I just don't seem to understand what I should do here:

I've looked at CodeSourcery and Linero and Scratchbox2 and Buildroot?? I've downloaded tons of stuff and am still trying to figure out what is best.

What is the easiest and/or most used path here?

Should I use the filesystem from the Kindle as a skeleton or use ???

I have a debian arm chroot working with qemu-arm-static so I can apt-get update in it, I thought I could compile in that? I guess not?

Many of the pages linked on this site for development are 404'd. Just some general guidance on what you use, and or maybe a config file or 2?

Thanks, as I have no more hair to pull out! :rofl: