Re: [boost] [build][wave][spirit] tools/wave link failure

From: Hartmut Kaiser (hartmut.kaiser_at_[hidden])
Date: 2008-01-31 17:38:40

Stefan,

> > Wave drags in threads only if it gets compiled in an environment
> requiring
> > threads (BOOST_HAS_THREADS is defined). If you build Wave such that
> > BOOST_HAS_THREADS is not defined, it won't depend on threads.
> 
> But having threads and using threads are not the same thing !
> Also, I find this configuration-based approach a little too
> coarse-grained. Ideally the question of whether or not to use threads
> (or whatever it is boost.spirit uses that requires thread support)
> would
> be configured using a template parameter (policy / traits), so the same
> library could be used with and without threads without requiring a
> separate build.

Agreed. But this isn't possible using the existing libraries. As I said,
threading support is needed for Spirit and Pool, both of which need to be
configured by pp constants at compile time.

Regards Hartmut