More on features

From: Vladimir Prus (ghost_at_[hidden])
Date: 2002-08-07 08:01:48

I've started tweaking V2 code according to feature description in the docs. 
In no time I've realized that the change is going to be really small -- we 
essentially only split free properties into free-valued and incidental.
Good.

But while we're on this topic, I have anyther suggestion. We were planning to 
support things like stlport using special generators, which would just modify 
build properties. I've done some initial work on generators, and they appear 
to be not so simple a thing. For that reason, I'd prefer not to complicate 
them more and support stlport et al in a different way.

Let's make "active" properties and features. If build properties for a main 
target contain an active property, like

<stdlib>stlport

then a previously registered rule will be called which will adjust properties.

Likewise, if there's feature

python-arity

with any value, another rule would translate it into appropriate defines.
Opinions?

- Volodya