Re: [Boost-users] [bcp][shared_ptr][wave]Extractingsubsetofboostforshared_ptr - 3.2MB?

From: David Abrahams (dave_at_[hidden])
Date: 2006-02-19 16:17:13

"Hartmut Kaiser" <hartmut.kaiser_at_[hidden]> writes:

>  
> David Abrahams wrote:
>
>> >> This one is easy. Just run the tool twice, once with the macro 
>> >> defined and once without.
>> >
>> > Not if there's more than one of them: it becomes a 2^N problem.
>> 
>> Oh far, more than that.  Consider something like:
>> 
>>   -DBOOST_MPL_MAX_SEQUENCE_LENGTH=40
>> 
>> The value of this macro affects which headers get included.
>
> But this particular macro is application specific, ergo should be constant
> for all different compiler configurations. The problematic part are the
> compiler dependent config macros, IMHO. 

User configuration info counts too, as we saw with
BOOST_SP_USE_QUICK_ALLOCATOR.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com