Date: Sun, 21 Jan 2001 00:15:41 -0000 (GMT) From: Duncan Barclay <dmlb@dmlb.org> To: Wes Peters <wes@softweyr.com> Cc: freebsd-hackers@FreeBSD.ORG, Russell L.Carter <rcarter@pinyon.org> Subject: Re: Clustering FreeBSD Message-ID: <XFMail.010121001541.dmlb@computer.my.domain> In-Reply-To: <3A693255.56934523@softweyr.com>
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On 20-Jan-01 Wes Peters wrote:
> "Russell L. Carter" wrote:
<details snipped>
>> %See the paper "Recursive Make Considered Harmful." Make is an amazing
>> %tool when used correctly.
>>
>> That's not the problem, unfortunately. I've never had a problem
>> rebuilding dependencies unnecessarily, or any of those
>> other problems described. Well precompiled headers would be
>> really really cool. The problem, again, is that parallelism
>> is limited by the directory structure, and the directory structure
>> is entirely rational.
>
> The directory structure has nothing to do with the Makefiles. To
> obtain the goal the paper suggests, you replace the recursive
> Makefiles with a single top-level Makefile that describes ALL of the
> targets and ALL of the dependencies. Note that this does not require
> a single mono- lithic Makefile; the top level Makefile can be a shell
> that includes per-directory Makefiles. The important part is to get a
> single dependency tree with no cycles in the graph.
I was so impressed by the clarity in the paper and dicussions with
friends that use Plan 9's "mk", that I put together "remake". This is a
Makefile framework that implements the per-directory Makefiles to build
the dependency tree. If anyone one wants to take a look it's at
http://www.ragnet.demon.co.uk/RM/remake.html
I haven't used it for a year or two and can only point to
http://www.ragnet.demon.co.uk/mynews
as an example of its use.
If anyone gets interested drop me a line and I will try and remember how
it works.
Duncan
> --
> "Where am I, and what am I doing in this handbasket?"
>
> Wes Peters Softweyr
> LLC
> wes@softweyr.com
> http://softweyr.com/
>
>
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---
________________________________________________________________________
Duncan Barclay | God smiles upon the little children,
dmlb@dmlb.org | the alcoholics, and the permanently stoned.
dmlb@freebsd.org| Steven King
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