Re: Toolset configuration question

From: David Abrahams (dave_at_[hidden])
Date: 2004-06-09 05:39:35

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.

-- 
Dave Abrahams
Boost Consulting
http://www.boost-consulting.com