Re: [jamboost] Re: Relevant properties

From: Vladimir Prus (ghost_at_[hidden])
Date: 2004-10-06 03:25:29

David Abrahams wrote:
> Vladimir Prus <ghost_at_[hidden]> writes:
> > exe foo : foo.cpp : <relevant-feature>none ;
>
> I am not fond of the name "relevant-feature." I suggest:
>
> exe foo : foo.cpp : <build-subdirectory>none

1. The build directory is still used, in my proposal. That is, targets are 
placed in "bin", not in ".".

2. How do we specify that we want some specific property in path. E.g.

exe foo : foo.cpp : <relevant-feature>doc-format ;

The <build-subdirectory> does not sound good in that context.

> That said, is this really something we want to set on a
> target-by-target basis?

Sometimes so, sometimes not. One use case is files produced by a parser 
generator -- if we add the generated files to CVS, we want Boost.Build to use 
"bin" path. If we don't add them to CVS, we want "bin/gcc/whatever" path.

As I've mentioned, with <relevant-feature> it's still possible do this this on 
per-generator basic -- the generator will add <relevant-feature> properties 
just before creating the dependency graph.

- Volodya