In order for this to work, you have to explicitly instantiate the code in the library/dll. It will not be instantiated automatically as it is not called from within the library. For an example of this take a look at demo_pimple Robert Ramey Cyril Picat wrote:
Hi everybody,
I have just tried a simple example of a class serialization in a DLL and did not manage to make it work. I have been using Boost serialization since a while but until now I was putting all the serialization code in the .hpp. By the way thanks Robert (and Boost) for this great library.
I am using MSVC 8.0 and Boost 1.34.1. I have tried the same with Boost Serialization 1.36 (head of Boost) without any success.
My test is the following. The class MyClass in declared in a DLL boost-example.dll built from Example.cpp. A test program Example.t.cpp linked with boost-example.dll try to serialize MyClass to an XML archive.
The files are the following:
//////// Example.hpp #if _MSC_VER > 1000 #pragma once #endif
// Do NOT include any headers after this point #if (defined(__COMPILING_Example_CPP__) && defined(WIN32)) #define _LIBSPEC __declspec(dllexport) #else #define _LIBSPEC #endif
class _LIBSPEC MyClass { public: MyClass();
private: friend class boost::serialization::access;
template <class Archive> void serialize(Archive & ar, const unsigned int version);
std::string m_str;
};
// add the folloing here #include <boost/archive/xml_oarchive.hpp> #include <boost/archive/xml_iarchive.hpp> .... // instanciate the code we want to generate and add tothe library template MyClass::serialize<boost::archive::xml_oarchive>; template MyClass::serialize<boost::archive::xml_iarchive>;