Quote Originally Posted by Weedman
How do I do it?

I've got the file, and run it with the options "-wuDbp". It's only picking up stuff to update in the world target.

If I run it without "-p", would it automatically rebuild the toolchain?

I think using this will update and rebuild your toolchain and then your world:
emwrap.sh -web
Since you are in the predicament you are in, I would do a:
emwrap.sh -Sbl
and then run a
emwrap.sh -wet
Be careful though, that can take just as long as a regular rebuild. It just rebuilds the toolchain in the correct order.

I usually just do this when glibc, GCC, or linux-headers is updated:
emerge -e system && emerge -e system && emerge -e world