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Phil Carmody on Thu, 26 Jan 2012 21:27:31 +0100
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- To: pari-dev@pari.math.u-bordeaux1.fr
- Subject: Re: Fwd: parallel make
- From: Phil Carmody <thefatphil@yahoo.co.uk>
- Date: Thu, 26 Jan 2012 20:27:24 +0000 (GMT)
- Delivery-date: Thu, 26 Jan 2012 21:27:31 +0100
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--- On Thu, 1/19/12, John Cremona <john.cremona@gmail.com> wrote:
> I normally build much faster using "make -j" instead of plain "make".
> Now I was just trying "./Configure --tune" for the first time, and I
> see that it is doing a full build (and I expect it will do this more
> than once given the estimated time for this given in the manual).
>
> If the Makefiles used $MAKE instead of make, then this could also be
> sped up via the user setting (e.g.) export MAKE='make -j' before
> starting. Is there any reason why this would not work?
If you have to perform recursive makes, then yes, that makes more sense. However, /Recursive Make Considered Harmful/. (There ought to be a followup to that called "gnu make without -r considered harmful". Strace a gmake on an empty directory, I dare you.
Phil