Re: [jamboost] Re: Precompiled headers

From: Reece Dunn (msclrhd_at_[hidden])
Date: 2005-09-23 05:56:52

>From: Vladimir Prus <ghost_at_[hidden]>
>On Friday 23 September 2005 12:27, Reece Dunn wrote:
> > Vladimir Prus wrote:
> > > On Thursday 15 September 2005 10:54, Reece Dunn wrote:
> > >>>When we talked about it before, the general agreement was to never 
>use
> > >>>automatic pch, but instead use manual mode. MSVC users said it's much
> > >>>more reliable.
> >
> > Precompiled headers are implemented in different ways on different
> > toolsets. It would be a good idea to collate this information for all
> > the toolsets. I have started with msvc and cw, although I'm not sure how
> > the options on CodeWarrior are used. We can then work out how to
> > implement PCH support.
> >
> > -- pch.jam --
> >
> > rule pch ( name : header : source ? )
> > {
> > # How do we implement this??
> > }
>
>If fact, you don't have to implement this at all.
>
>1. Define type PCH. This will automatically define main target rule "pch".
>2. The rule will be able to accept as many sources as you pass to it.
>3. For msvc, define the generator like this:
>
> generators.register-standard msvc.pch : CPP HPP : PCH : <toolset>msvc ;

Cool! Is this in the BBv2 documents somewhere... something like this would 
be great as a simple example to see how types, generators and rules fit 
together, so you have that "aha!" moment when it all starts to fit together 
:).

- Reece