Re: [Boost-build] [v2] serialization library as dependency

From: Reece Dunn (msclrhd_at_[hidden])
Date: 2006-06-26 11:59:16

David Abrahams wrote:
> "Reece Dunn" <msclrhd_at_[hidden]> writes:
> > David Abrahams wrote:
> >> 
> >> Isn't "$(BOOST_ROOT)" just supposed to be "boost"?  Or am I missing
> >> something?
> >
> > (2) You import the $(BOOST_ROOT) library names in a parent Jamfile
> > of the one you are referencing the boost//library in. I can't recall
> > exactly how to do this, but I think it is something like:
> >
> >    using-project boost : $(BOOST_ROOT) ;
> 
> It's 
> 
>      use-project boost : /path/to/boost/root ;

Thanks.

> > You could have:
> >
> >    alias boost : $(BOOST_ROOT) ;
> >
> > and
> >
> >    exe test : [ glob *.cpp ] boost//thread ;
> >
> > I believe that would work. Either way, I think you need
> > $(BOOST_ROOT) somewhere when you are not in a child of
> > $(BOOST_ROOT).
> 
> I guess my point is that you don't really need $(BOOST_ROOT)
> anywhere.  That variable was a requirement for BBv1 in some cases, but
> now it's obsolete... and yet, people cling to it.

I wasn't aware that $(BOOST_ROOT) was a V1 thing and that it is
obsolete.

One advantage to using BOOST_ROOT is that if you have a project
that is dependant on Boost checked into CVS, Perforce or some other
source control system in such a way that the project and Boost could
be anywhere on the system, if you want that project to use Boost,
BOOST_ROOT is the easiest way to avoid issues. If you check in to
the SCM:

   use-project boost : c:/boost ;

then this prevents the developer(s) working on that project from
having Boost somewhere else (and prevents Unix/Mac development!)

I would say having:

   use-project boost : $(BOOST_ROOT) ;

at the root of your project (or some other environment variable)
is the best you can do in this situation. I like being able to say:

   /boost//thread

etc. in BBv2.

- Reece
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