Thanks for the reply. I'm afraid you misunderstood my post. I *know* that BOOST_CLASS_EXPORT is only required for derived classes; and in my actual application, that's certainly what I'm attempting to use it for. The code I posted was just the very simplest code that illustrates the problem, which is (as I said): if I try to use *both* BOOST_CLASS_EXPORT and either of the polymorphic archives, I get a link error. Please try compiling my simple example, *with* the BOOST_CLASS_EXPORT() in there, and see what you get. P.S. Thanks for the suggestion on opening the ostringstream "binary". -----Original Message----- From: boost-bounces@lists.boost.org [mailto:boost-bounces@lists.boost.org] On Behalf Of Robert Ramey Sent: Friday, January 21, 2011 5:08 PM To: boost@lists.boost.org Subject: Re: [boost] [1.44][serialization] Link error with polymorphicarchiveand BOOST_CLASS_EXPORT Wilson Tim-CTW024 wrote:
I've run into a conflict between use of the polymorphic archives and the BOOST_CLASS_EXPORT() macro. It doesn't seem possible to use both without getting a link error. The following code illustrates the problem (yes, I know this code doesn't do anything worth doing, but it's the simplest code that demonstrates the problem):
----------------------
# include <sstream>
# include <boost/serialization/export.hpp> # include <boost/archive/polymorphic_binary_oarchive.hpp>
class A { public:
template<class Archive> void serialize(Archive & ar, const unsigned version) { }
};
///BOOST_CLASS_EXPORT(A); // need only for derived classes
int main() {
A a;
std::ostringstream os(std::ios_binary); // make sure stream is opened
binary // boost::archive::polymorphic_binary_oarchive oa(os); boost::archive::polymorphic_oarchive & oa = boost::archive::polymorphic_binary_oarchive(os); oa & a; }
Try the above changes. Robert Ramey _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost