Re: Speeding up the bootstrap build - a quick hack.

[Eli Zaretskii]

> Date: Wed, 19 Jan 2022 16:50:11 +0000
> Cc: monnier@iro.umontreal.ca, emacs-devel@gnu.org
> From: Alan Mackenzie <acm@muc.de>
> 
> The idea is to leave lisp/Makefile.in unchanged, and make all the
> alterations in src/Makefile.in.
> 
> The segment of code you cite above builds all of compile-first in one
> invocation, so there's no need to worry about mixtures of interpreted
> source and .elc.
> 
> So, we duplicate that bit of code, setting the Emacs variable
> no-native-compile on the command line of the first occurrence.  This
> will cause the byte compilation of all of compile-first.
> 
> After this bit of new code, we use 'touch' to set the date of these new
> *.elc's back to the distant past.  This will ensure that these *.el's
> get built again in the next step.
> 
> The second duplicate of the old bit of make code will build the .eln's,
> using the ("very old") .elc's which are still available inside Emacs.
> It should do this reasonably quickly, because it is using *.elc's.

Yes, that's the idea.

> Yes, I agree that this approach is more elegant and surely easier to
> maintain than my original hack, if it can be made to work (which it
> surely can).  I will look at this this evening.  Thanks for the
> suggestion.

Thank you.