Re: [Boost-users] [serialization] BOOST_CLASS_EXPORT_GUID cant link

From: Robert Ramey (ramey_at_[hidden])
Date: 2007-07-04 18:03:50

This most likely occurs if you have something like the following in more 
than
one module:

#include "water.hpp" // which icludes BOOST...EXPORT
#include "../?iarchive.hpp"
#include "../?oarchive.hpp"

to fix this - make sure you include .../archive.hpp in only one module.

Robert Ramey

Manuel Jung wrote:
> Hi,
>
> Im trying to use the BOOST_CLASS_EXPORT_GUID, but if i use it, i cant
> link my project.
> if got these error messages:
>
> /gcc-4.1.2/debug/threading-multi/crabd.o:/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/exception:57:
> multiple definition of
> `boost::archive::detail::guid_initializer<water::status>::instance'
> bin/gcc-4.1.2/debug/threading-multi/seal.o:/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/exception:57:
> first defined here
> bin/gcc-4.1.2/debug/threading-multi/water.o:/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/exception:57:
> multiple definition of
> `boost::archive::detail::guid_initializer<water::status>::instance'
> bin/gcc-4.1.2/debug/threading-multi/seal.o:/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/exception:57:
> first defined here
>
> The file with the macros is just one time defined. Is there an other
> possible reason than multiple definition or a more hidden way to
> define it more than one time?
> Kind Regards
> Manuel Jung