Re: [jamboost] Boost.Build V2, load behaviour part 2.

From: Rene Rivera (grafik666_at_[hidden])
Date: 2002-04-08 13:23:00

On 2002-04-08 at 09:59 PM, ghost_at_[hidden] (Vladimir Prus) wrote:

>Rene Rivera wrote:
>
>> >> project (and from project root, maybe?)
>> >> 2. I believe (and I think we've talked about it some time ago), that
>> >
>> >backward
>> >
>> >> propagation of requirement should be supported. E.g. -- a using
>> >
>> ><lib>boost in
>> >
>> >> sources will automatically add boost includes.
>> >
>> >Agreed.
>>
>> No. Doing that generically would be a problem for me. If we make that the
>> default behaviour I would need a way to prevent those and other kinds of
>> properties from propagating to other targets. It might not be evident to
>> Boost compiling, after all Boost does the sensible thing of having a
>> separate include directory. But I make use of other packages which aren't
>> that sensible. I have to deal with some projects which have different
>> settings, and includes for when building the lib, than when using the
lib.
>
>I case that wasn't evident from my post, I don't mean that requirements 
>propagation should be default behavour. It should be some special kind of 
>requirements
>
>lib my_lib : ...........
> : <export_include>.....
>
>Since, for ill-behaving libraries, you're likely to write Jamfiles
yourself, 
>it will be possible to decide is exporting include is needed or not.

It wasn't evident from your post :-) Yes it makes sense to me that exporting
things like that is the way to go. Also since it's an orthogonal aspect this
might be better syntax:

lib my_lib : ...
: <export><include>/baz

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