Re: [PATCH] Autogen bootstrap targets and make them preinstall

[Nathanael Nerode <neroden at twcny dot rr dot com>]

Paolo Bonzini wrote:
> I got tired of updating the same thing three times, so I decided it was 
> time to let Autogen do some more.  I'm quite pleased of the result, and 
> it will make it *much* easier to add yummy things like 
> profiledbootstrap4-lean. ;-)
>
> All bootstrap-related targets are automatically generated from 
> parameters in Makefile.def.
>
> The new targets are
>
> - distclean-stageN: quite clear.
> - new-stageN-start: same as stageN in the gcc makefile
> - new-stageN-end: same as unstageN in the gcc makefile
> - new-stageN-bubble (N=1,2): If a stage has been built, forces an
>   incremental rebuild of the stages up to N.  Then, if the successive
>   stage has been already configured, it disables reconfiguration of
>   stage N+1.  If the stage has not been built, this does nothing.
>
> With this patch, after any all-stageN-gcc has been successfully built, 
> "make new-bootstrap" will act as a bubblestrap because it invokes 
> new-stage3-bubble to make stage3.  If one does not want the bubblestrap 
> behavior, they'll use new-restage3 or new-cleanstrap.
>
> I include the Makefile.in diff because it is quite easy to read, more 
> than Makefile.tpl. :-(  New-bootstrapped i686-pc-linux-gnu, ok for 
> mainline and src if the gcc patch is accepted?

Yes.

I like it a lot.  It's in such a form that I feel I could easily make 
further improvements without losing the abstraction.  :-)

I'm still not happy with the level of 
recursive-Make-calls-to-the-same-file usage, but I think it's managable, 
and potentially fixable without major architectural changes.