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Re: Parallelization of shell scripts for 'configure' etc.

From: Alex Ameen
Subject: Re: Parallelization of shell scripts for 'configure' etc.
Date: Mon, 13 Jun 2022 21:00:23 -0500

You can try to use the `requires` toposort routine to identify "Strongly
Connected Sub-Components", which is where I imagine you'll get the
best results. What you'll need to watch out for is undeclared ordering
requirements that parallelism would break.

The `m4sh` and `m4sugar` source code is documented in a lot of detail. The
manuals exclude that type of documentation because it's internal; but you
could keep yourself occupied for at least a month or two before you ran out
of topics to explore.

On Mon, Jun 13, 2022, 8:45 PM Dale R. Worley <worley@alum.mit.edu> wrote:

> Paul Eggert <eggert@cs.ucla.edu> writes:
> > In many Gnu projects, the 'configure' script is the biggest barrier to
> > building because it takes soooo long to run. Is there some way that we
> > could improve its performance without completely reengineering it, by
> > improving Bash so that it can parallelize 'configure' scripts?
> It seems to me that bash provides the needed tools -- "( ... ) &" lets
> you run things in parallel.  Similarly, if you've got a lot of small
> tasks with a complex web of dependencies, you can encode that in a
> "makefile".
> It seems to me that the heavy work is rebuilding how "configure" scripts
> are constructed based on which items can be run in parallel.  I've never
> seen any "metadocumentation" that laid out how all that worked.
> Dale

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