Re: [jamboost] Re: Toolset configuration question

From: Vladimir Prus (ghost_at_[hidden])
Date: 2004-06-09 06:06:24

David Abrahams wrote:
> Vladimir Prus <ghost_at_[hidden]> writes:
> > I'd like to finally settle the question that Michael raised some time
> > ago. Briefly, given
> >
> > using gcc ;
> > using gcc : 3.3 : g++-3.3 ;
> >
> > it is not clear if default-configured gcc is the same as gcc 3.3, or not.
> > This might cause a problem for user, since he can build the project twice
> > without need, and it causes some complexity for toolsets.
> >
> > Here's what I propose: each "configuration parameter" of toolset should
> > be either specified on all calls of the "using" rule, or omitted in all
> > the calls. The rationale is: first time user can invoke "using gcc ; "
> > and it will work. Advanced user, who wants to configure several version,
> > probably knows the version number of default "gcc" as well, so it's no
> > problem for him.
>
> I think we could get into trouble with separate "using" statements in
> site_config / user_config. Don't forget that site_config may be
> installed by some sysadmin somewhere.

Then I wonder what could be done? Maybe, just a policy that shared site_config 
may not use versionless init. 

- Volodya