Re: [jamboost] [UI] default-build syntax

From: Vladimir Prus (ghost_at_[hidden])
Date: 2002-10-09 09:06:12

David Abrahams wrote:
> Vladimir Prus <ghost_at_[hidden]> writes:
> 
> 
>>I'm currently about to implement "use-requirements", which are 
>>requirements propagated to targets that use one which specifies 
>>"use-requirements". 
> 
> 
> That last phrase makes no sense to me. Can you show an example of
> where those requirements are propagated to, say, in conjunction with
> the code below?

I'll use more concrete example. Boost.date_time requires that any code 
that uses it set DATE_TIME_INLINE defines. This might be conveniently 
implemented this way:

lib date_time : ..... : use-requirements <define>DATE_TIME_INLINE ;

if somebody writes:

exe calendar : calendar.cpp @/boost/date_time/date_time ;

then <define>DATE_TIME_INCLUDE will be applied when compiling calendar.cpp

- Volodya