Re: [jamboost] Re: [V2] Problems with setting <exception-handling>off with msvc

From: Jürgen Hunold (hunold_at_[hidden])
Date: 2005-07-05 01:40:32

Hi !

On Maandag 04 Juli 2005 19:12, David Abrahams wrote:
> Vladimir Prus <ghost_at_[hidden]> writes:
> > I think the situation is that Jurgen has <use>/boost
> > somewhere. That, in turns builds every single target in Boost, and
> > propagates usages requirements back to the dependent. Including that
> > <async-exceptions> thing.
>
> Why is that an appropriate behavior? For what use case would it make
> sense?

Yes, this is the question our discussion boiled down to.

> > The right solution is a combination of:
> >
> > 1. <use>-in only the needed libraries

Well, I normally use only header-only libraries.

> > 2. Add "alias headers ; " to top-level Boost Jamfile.v2, and
> > <use>/boost//headers. This way, you'll get <include> usage requirements
> > from top-level Jamfile.v2, and nothing else.

This would be great. 

> Maybe; I still have a hard time understanding that using a project
> means using every library in it.

Yes. Especially since the new alias "headers ;" would be subject to this 
behaviour, too. In this case this is good but it might be better to 
explicitly put "headers" in the usage-requierements of "project /boost ;" 

Yours,

Jürgen 

-- 
* Dipl.-Math. Jürgen Hunold ! Institut für Verkehrswesen, Eisenbahnbau
* voice: ++49 511 762-2529 ! und -betrieb, Universität Hannover 
* fax : ++49 511 762-3001 ! Appelstrasse 9a, D-30167 Hannover
* hunold_at_[hidden] ! www.ive.uni-hannover.de