toplevel bootstrap (stage 2 project)

[Paolo Bonzini]

>What does "./configure --enable-botstrap; make bootstrap" do?
>  
>
The same as plain make.  bootstrap is the default target when 
--enable-bootstrap is given, and its behavior resembles a "bubblestrap" 
(see later) in the old system.

This removes the wart where "make" following a "make bootstrap" invoked 
a "quickstrap" and often caused comparison failures.  To the next topic...

> It would help also if you add to the wiki explanation of what exactly all
> these options do. Especially bubblestrap vs quickstrap vs restrap.

... bubblestrap rebuilds only changed files.  quickstrap rebuilds only 
the last stage.  restrap takes (took?) a non-bootstrap build, uses it as 
stage1, and then completes the bootstrap.

Paolo