makefile debugging

[Tim Harvey]

Greetings,

I seem to recall a way to ask OpenWrt's build system to output a list
of all variable values used in the build but can't find it documented
or in my notes. Does anyone know how to do that?

Also, is there a way to output a post-processed Makefile after all the
define foo gets done? I find it pretty difficult to work through the
build system, especially when working with images.

Best Regards,

Tim