Whoever wrote:

> I have upgraded the h/w in one machine. Now it make sense to change the
> "chost" and "march".
>
> Are there any considerations here? I am concerned that programs may be
> looking for a specific directory for things like glibc libraries and fail
> to find them.

I have read that you must only change the CHOST setting for a stage 1
install, which pretty much rules out changing it on a new machine. Changing
march makes sense though, and will only be a setting for newly compiled
things, I don't think it could break anything unless you're using unstable
optimisations.