Re: [jamboost] [BBv2 docs editorial] tutorial/conditions

From: Vladimir Prus (ghost_at_[hidden])
Date: 2005-09-21 09:40:43

On Tuesday 20 September 2005 23:46, David Abrahams wrote:

> > lib demangler : dummy_demangler.cpp ; # alternative
> > 1 lib demangler : demangler_gcc.cpp : <toolset>gcc ; # alternative 2
> > lib demangler : demangler_msvc.cpp : <toolset>msvc ; # alternative 3
> >
> > In the example above, when built with gcc or msvc, demangler will use
> > a source file specific to the toolset. Otherwise, it will use a
> > generic source file, dummy_demangler.cpp.
>
> Does it select the best match, or what? The reader needs to get at
> least a very rough sense of how the alternative selection process
> works at this point.

I've modified this to be:

When building <filename>demangler</filename>, Boost.Build will compare
requirements for each alternative with build properties to find a best match.
For example, when building with with <code>&lt;toolset&gt;gcc</code>, 
alternative 2, will be selected, and when building with 
<code>&lt;toolset&gt;msvc</code> alternative 3 will be selected. In all other
cases, the most generic alternative 1 will be built.

- Volodya

-- 
Vladimir Prus
http://vladimir_prus.blogspot.com
Boost.Build V2: http://boost.org/boost-build2