Re: [jamboost] Boost.Build and SCons

From: Pedro Ferreira (pedro.ferreira_at_[hidden])
Date: 2004-12-22 07:41:55

Hi Steven,

Em 22 Dec 2004, às 12:20, Steven Knight escreveu:

> Hi Pedro (et al.)--
>
> One follow-on note here:
>
>> many thanks for your support: it is very welcome and am looking 
>> forward
>> to try to contribute to enhance SCons as well.
> .
> .
> .
>>>> I really don't like SCons Enviroments because they are too cluttered
>>>> with functions, are too unwieldy, load all tools by default, etc.
>>>> So I prefer the second approach: it provides all the functionality
>>>> bjam
>>>> provides (and more) and fits very well with BB's architecture.
> .
> .
> .
>>> That said, I agree with you that SCons Environments have become too
>>> heavyweight. To that extent, we will be cleaning up how Environments
>>> handle Tools at some point in the (relatively near) future, after
>>> 0.97 is out.
>
>>> I'd be very interested if your project (or anyone else) came up
>>> with some sort of "minimal Environment," for example, that still
>>> made things build correctly. What I'd be inclined to do is fold
>>> that into the SCons build engine itself, so there's a relatively
>>> lightweight Environment base class appropriate for all interfaces,
>>> and the "cluttered" Environment subclass(es) can be ignored by
>>> interfaces like yours that don't need the extra stuff.
>
> I just wanted to let you know that the weight-loss program for SCons
> Environments has begun. I checked in a change yesterday that splits up
> construction environments into a base class that just handles 
> construction
> variable substitution, and two differently flavored subclasses.
>
> This change was driven by trying to cut down on copies of construction
> environments, so there are still a lot of methods there, but it's a
> first step towards what I hope will be an eventual refactoring of the
> construction environment architecture to allow other interfaces (such
> as Boost.Build) to only require the pieces they need.

Looks promising. Thanks for keeping us up to date!

> Let me know whenever you get to the point of diving in to this level 
> so we
> can try to figure out how to further refactor the architecture.  
> Thanks!

We certainly will.

Regards,

Pedro