Subject: Re: [boost] [1.58.0] Release candidates available
From: Rob Stewart (rob.stewart_at_[hidden])
Date: 2015-04-08 04:41:25
On April 7, 2015 6:05:34 AM EDT, Vladimir Prus <vladimir_at_[hidden]> wrote:
> On 04/07/2015 11:40 AM, Rob Stewart wrote:
> > If Boost used to build fine on a limited machine, it might slow to a
> crawl due to paging with the added parallelism. Such users would have
> to use -j1 to avoid that problem.
> > Those with memory enough and more CPUs need to opt in to benefit, of
> course, but the build doesn't swamp such machines by default. However,
> if the option could be set in user.jam, then those that wish to opt in
> can do so once and then forget about it.
> Rob, it used to be possible to do:
> import option ;
> option.set jobs : 4 ;
> in user-config.jam, but that appears to have regressed. Is that what
> you're after?
I wasn't requesting the feature so much as suggesting that it would be reasonable to have a user-specified, opt in mechanism for building in parallel as part of my answer to why parallel ought not be the default.
However, to directly answer your question, yes, I think such an option would be nice. It also looks like it could be used for other options, too, which would be nice.
(Sent from my portable computation engine)