Re: [Boost-users] serialization: "derived class not registered orexported" exception , 1.45 boost

Subject: Re: [Boost-users] serialization: "derived class not registered orexported" exception , 1.45 boost
From: Hicham Mouline (hicham_at_[hidden])
Date: 2010-12-19 18:09:29

> -----Original Message-----
> From: boost-users-bounces_at_[hidden] [mailto:boost-users-
> bounces_at_[hidden]] On Behalf Of Robert Ramey
> Sent: 19 December 2010 22:48
> To: boost-users_at_[hidden]
> Subject: Re: [Boost-users] serialization: "derived class not registered
> orexported" exception , 1.45 boost
> 
> Hicham Mouline wrote:
> > Hello,
> >
> > I have moved all serialization code in a separate static library that
> > I called serialization. This, in my case, depends on mpi.
> > The headers in this static library:
> > 1.       include <boost/serialization/export.hpp>
> > 2.       include the definition of the derived class being serialized
> > 3.       declare a template function serialize() that takes a
> > reference to the derived class being serialized in the
> > boost::serialization namespace
> > 4.       invoke the BOOST_CLASS_EXPORT_KEY(<derivedclass>) macro at
> > the global namespace scope
> >
> > The corresponding source files in this static library:
> > 1.       include the header
> > 2.       define the function template serialize()
> > 3.       explicitly instantiate the serialize() function with all the
> > archives used: mpi::packed_iarchive and mpi::packed_oarchive in the
> > boost::serialization namespace
> > 4.       invoke the BOOST_CLASS_EXPORT_IMPLEMENT(<derivedclass>)
> > macro at the global namespace scope
> >
> > The main program links against this static library, and invokes a mpi
> > function (broadcast) that serializes by the base pointer. The base
> > class is polymorphic. All class derivations are public.
> >
> > Debugging, the code reaches : archive/detail/oserializer.hpp
> >
> >
> boost::archive::detail::save_pointer_type<boost::mpi::packed_oarchive>:
> :polymorphic::save<baseclass>(boost::mpi::packed_oarchive
> > & ar={...}, baseclass& t={...})  Line 400 + 0x38 bytes
> >
> > where NULL==true_type
> >
> > However, looking at the t argument of save(), it shows that is the
> > correct derived object. But the type T is the base class.
> >
> > What am I missing?
> 
> Not much, you're almost there.
> 
> You've invoked the EXPORT macros so the runtime static objects
> are created in the library.  So far, so good.  But you're mainline
> doesn't
> refer to them, so they are not included in your executable.  I think
> the
> easiest way to do this is to include in the execution build something
> like:
> 
> my_module.cpp
> 
> #include "my_type.hpp"
> BOOST_SERIALIZATION_EXPORT_IMPL(my_type)
> ...
> other types.
> 

I've just tried this. Do you mean
BOOST_CLASS_EXPORT_IMPLEMENT?

I can't find BOOST_SERIALIZATION_EXPORT_IMPL anywhere in boost/serialization
nor archive headers.

when I tried BOOST_CLASS_EXPORT_IMPLEMENT, it complained about a member
g  begin defined twice, in my serialization lib, and my main code,

rds,