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

From: Hughes, James (jhughes_at_[hidden])
Date: 2007-07-06 04:36:46

I've been putting these macros into cpp files where possible, which
prevents this sort of thing from happening, but I am doing this stuff in
libraries so that's really the only option.

James 

> -----Original Message-----
> From: boost-users-bounces_at_[hidden] 
> [mailto:boost-users-bounces_at_[hidden]] On Behalf Of Manuel Jung
> Sent: 05 July 2007 08:30
> To: boost-users_at_[hidden]
> Subject: Re: [Boost-users] [serialization] 
> BOOST_CLASS_EXPORT_GUID cant link
> 
> Hi,
> 
> Yes this did the trick, thanks. The EXPORT Scripts were in a 
> header file and thus included more than one time from 
> different cpp files.
> Thanks!
> Greetings
> Manuel Jung
> 
> > 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-lin
ux-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-l
inux-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-l
inux-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
> 
> 
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