Re: [Boost-build] Nested projects

Subject: Re: [Boost-build] Nested projects
From: Johan Nilsson (r.johan.nilsson_at_[hidden])
Date: 2009-09-15 02:57:57

Brian Ravnsgaard Riis wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hi,
>
> Is it currently possible to nest a complete, seperately compilable
> project inside a boost.build project. Say I have a library, foo, that
> can be seperately compiled using boost.build. I use a "externals"
> facility to get a given revision of foo into a nested externals or
> vendor folder under a project that uses foo.
>
> <~/dev/bar>
>    + jamroot.jam
>    + src
>    |  + jamfile.jam
>    |  + *.cpp
>    |  - *.hpp
>    - externals
>       - foo
>          + jamroot.jam
>          - src
>             + jamfile.jam
>             + *.cpp
>             - *.hpp
>
> How would you do this with Boost.Build? I tried the naïve approach and
> get bitten by an error along the lines of "warning: rulename
> $($(project).attributes).get expands to empty string".

I'm not really sure what the "naive" approach boils down to, but did you try 
e.g.:

-- dev/bar/externals/foo/jamroot.jam --

...
use-project src : src ;

-- dev/bar/jamroot.jam --

...
use-project /foo : externals/foo ;
alias foo-src : /foo//src ;

[caveat: not tested]

HTH / Johan