[Boost-users] [serialization] conflicting declaration (BOOST_CLASS_EXPORT)

Subject: [Boost-users] [serialization] conflicting declaration (BOOST_CLASS_EXPORT)
From: jens weller (jensweller_at_[hidden])
Date: 2008-09-18 15:28:58

Hi,

I just had this similar error today, but it took me quite a few minutes 
to build a working "example".

I'll start off with the error(s):
L:\project\serializationtest\Mixed.hpp:27: error: conflicting 
declaration 'const 
boost::archive::detail::guid_initializer<Mixed>&<unnamed>::boost_serialization_guid_initializer_27'
L:\project\serializationtest\Child.hpp:27: error: 
'<unnamed>::boost_serialization_guid_initializer_27' has a previous 
declaration as `const 
boost::archive::detail::guid_initializer<Child>&<unnamed>::boost_serialization_guid_initializer_27'
L:\project\serializationtest\Mixed.hpp:27: error: type mismatch with 
previous external decl of `const 
boost::archive::detail::guid_initializer<Mixed>&<unnamed>::boost_serialization_guid_initializer_27'
L:\project\serializationtest\Child.hpp:27: error: previous external decl 
of `const 
boost::archive::detail::guid_initializer<Child>&<unnamed>::boost_serialization_guid_initializer_27'
L:\project\serializationtest\Mixed.hpp:27: error: declaration of `const 
boost::archive::detail::guid_initializer<Mixed>&<unnamed>::boost_serialization_guid_initializer_27'
L:\project\serializationtest\Child.hpp:27: error: conflicts with 
previous declaration `const 
boost::archive::detail::guid_initializer<Child>&<unnamed>::boost_serialization_guid_initializer_27'
:: === Build finished: 6 errors, 0 warnings ===

This is my class structure:

Base
Child : Base
Mixed : Base or #include "Base.hpp" is actually enough.

Easy, but maybe its already a hint to the problem. The "original" Class
structure in my app is far more complex, so I just will refer to my 
little example, as I guess its the same source some how.
I tend to believe that the problem resides somewhere in the Macro
BOOST_CLASS_EXPORT, as the compiler points to this.
I'm working on Windows XP, with MinGW and the latest (Monday) SVN Build
of boost. (as serialization is in 1.36 partly broken afaik/imho).

I'll attach my code.

So, how to resolve this?

regards

Jens Weller