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Re: parallel build bug in git M4

From: Ralf Wildenhues
Subject: Re: parallel build bug in git M4
Date: Thu, 19 Mar 2009 06:54:58 +0100
User-agent: Mutt/1.5.18 (2008-05-17)

Hi Eric,

* Eric Blake wrote on Thu, Mar 19, 2009 at 02:31:26AM CET:
> According to Ralf Wildenhues on 3/14/2009 6:36 AM:
> > 
> > I have been thinking about this a bit, and the only real solution that
> > I've found that doesn't involve other races or adding .NOTPARALLEL was
> > to reintroduce a subdir makefile.  But then we can put all doc/ rules
> > there again; see the patch below.  Do you see any other possibilities?
> I'm still thinking about it.  Gary originally introduced the non-recursive
> make; and for the source files and incremental builds, it makes a big
> difference.

The reintroduction of doc/Makefile.am carries only a negligible speed

> But the documentation doesn't have much that runs in
> parallel, and making the man page occur in a recursive make doesn't seem
> like too big a penalty from my point of view if it avoids the race.  I'd
> really like to hear from Gary on this issue, though, before pushing anything.



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