Re: [Boost-build] can I determine if a project has been added?

Subject: Re: [Boost-build] can I determine if a project has been added?
From: Vladimir Prus (ghost_at_[hidden])
Date: 2010-12-09 15:42:12

On Thursday, December 09, 2010 22:48:38 Spencer E. Olson wrote:
> Is there some way that one project can test whether another project has
> been added, such that referencing a target in that other project will be
> resolved?
> 
> I'd like to optionally specifiy some metatargets (exe, alias, ...)
> depending on whether a particular project has been added with
> 'use-project'
> 
> Configuration is something like this:
> <root-project/Jamroot>
>   use-project /lib1 : ./lib1/ ;
>   use-project /lib2 : ./lib2/ ;
> 
> <lib1/Jamroot>
>   lib mylib : ... ;
>   ...
> 
> <lib2/Jamroot>
>   lib mylib : ... ;
> 
>   if lib1 {
>     lib mylib2 :  ... ;
>     exe exe2 : /lib1//mylib ;
>   }

Try this:

        path-constant HERE : . ;
        import project ;
        if [ project.find /lib1 : $(HERE) ] {
        }

This is untested code.

- Volodya

-- 
Vladimir Prus
http://vladimir_prus.blogspot.com
Boost.Build: http://boost.org/boost-build2