Re: [jamboost] bjam and environment variables

From: Vladimir Prus (ghost_at_[hidden])
Date: 2004-10-11 03:39:56

Hi Toon,
> At the end of chapter 2 of the documentation, it says that one needs to
> create a file boost-build.jam that contains:
> boost-build /path/to/boost.build ;
>
> It however does specify
> 1) if the path needs be absolute or can also be relative
> 2) if environment variables can be used at this point.
>
> IMO the answer to these questions is:
> 1) both
> 2) yes

That's right.

> So this brings me to a broader question: are all env.vars. made
> available inside bjam? 

They are available *only* in the global module -- where boost-build.jam lives. 
All other files: Jamfiles, project-root.jam, Boost.Build files, are in 
separate modules, and env vars can be only obtained as documented at 

http://boost.org/boost-build2/doc/html/ch06s02.html

> What if there is a clash between a local variable 
> and a env.var?

It's not possible, I think.

> So finally to conclude: would'nt it be a good idea to start a
> wiki-documentation project? This way unexperienced users (like my self)
> could help with the documentation as long as you can overlook everything
> to make sure the information is always correct.

This is good idea. I'll contact Jeff to ask his opinion about creating such a 
page on Boost Wiki.

- Volodya