is re-running bootstrap after a change safe?

[Eric Botcazou]

> Say if the first bootstrap succeeds and I then change a single
> GCC .c file and rerun make bootstrap, am I guaranteed to see
> the same fallout of the change as I would if I did a pristine
> build in a clean directory?

No, this would imply deleting the stage2 and stage3 compilers and that isn't 
what happens.  Instead the compiler of each stage is updated in isolation.

-- 
Eric Botcazou