Re: [Boost-build] [bbv2] propagating requirements to libraries

From: Eric Niebler (eric_at_[hidden])
Date: 2007-04-04 11:55:46

Konstantin Litvinenko wrote:
> Hello, Eric!
> You wrote  on Tue, 03 Apr 2007 12:13:26 -0700:
> 
>  EN> This causes all of my tests to crash, because the tests are built with
>  EN> _HAS_ITERATOR_DEBUGGING=0, and the unit test framework is not. What I
>  EN> really need to do is build my *own* version of the unit test framework
>  EN> with this define, and link to that. But I don't know how to get the
>  EN> <define> requirement to propagate to the library.
> 
>  EN> Can anybody tell me the magic incantation?
> 
> Try this
> 
> import feature ;
> 
> feature.feature iterator_debugging : on off : composite propagated optional 
> ;
> feature.compose <iterator_debugging>off : <define>_HAS_ITERATOR_DEBUGGING=0 
> ;
> 
> project
>      : requirements
>        <library>/boost/test//boost_unit_test_framework
>        <link>static
>        # MSVC-8's iterator debugging causes some tests to run forever.
>        <toolset>msvc-8.0:<iterator_debugging>off
>      ;
> 
> test-suite "accumulators"
>      : [ run count.cpp ]
>        [ run covariance.cpp ]
> ...
>      ;

It works! You're a genius. And I see that puts the resulting lib in a 
special iterator_debugging-off/ subdirectory, so other tests that don't 
use this feature won't link to this special lib inadvertently. Very nice.

-- 
Eric Niebler
Boost Consulting
www.boost-consulting.com