Re: [Boost-users] Problem with Serialization in Boost 1.37

Subject: Re: [Boost-users] Problem with Serialization in Boost 1.37
From: Christoph Mayer (mayer_at_[hidden])
Date: 2009-03-02 03:27:37

Hi,

I still have the issue described below. If someone could give me a hint 
why using BOOST_CLASS_EXPORT from Boost.Serialization give me linker 
errors I would greatly appreciate it!

The small code that reproduces the problem is available at 
http://pastebin.com/m5eebb3b7

Thanks,
Chris

Christoph Mayer schrieb:
> Hi,
> 
>>> when using Boost v1.37 I get a problem with the serialization library
>>> that did not appear before. The following linker error occurs:
>>>
>>>> undefined reference to
>>> `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: 
>>>
>>>> polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch 
>>>>
>>> ive::binary_oarchive, char, std::char_traits<char> > >
>>>>>> :~archive_pointer_oserializer()'
>>> The error does not appear when I omit the class registration using
>>> BOOST_CLASS_EXPORT_GUID.
> 
> Robert Ramey schrieb:
>  > Support for EXPORT was clarified and improved in 1.37.  The 
> documention was
>  > updated to reflect this.  Double check the documentation in this area 
> and
>  > verify that your usage if EXPORT is consistent with the information 
> found
>  > there.
> 
> Thanks for your reply. Unfortunately I have been struggling with this 
> now for weeks and can't get it to work.
> 
> I created a minimal sample that reproduces the linker error on Boost 
> 1.38. The sample is attached below and available at 
> http://pastebin.com/m5eebb3b7
> 
> This code does not compile on Boost 1.38 but on Boost 1.34. There is one 
> special one that is shown as
> ///////// COMMENT THE NEXT LINE TO MAKE IT COMPILE!!!
> If I comment the next line in the sample the code compiler with Boost 
> 1.38. But then I get an exception saying "unregistered class".
> 
> If possible I would like to use BOOST_CLASS_EXPORT as it fits nicely 
> into my project structure.
> 
> I am aware that the there are much unused #includes, as I assembled this 
> sample from a larger project.
> 
> Any hints on how the inclusion of the BOOST_CLASS_EXPORT causes problems 
> here is welcome!
> 
> Thanks,
> Chris
> 
> 
> //////////////////////////////////////////////
> // ---------------> Message
> 
> #include <boost/serialization/serialization.hpp>
> #include <boost/serialization/base_object.hpp>
> #include <boost/serialization/assume_abstract.hpp>
> 
> class Message {
>     friend class boost::serialization::access;
> public:
>     Message() : type(123) {
>     }
> 
>     virtual ~Message(){
>     }
> 
>     virtual void virtualfunc () = 0;
> 
> private:
>     int type;
>     
>     template<class Archive>
>     void serialize(Archive& x, const unsigned int version){
>         x & type;
>     }
> };
> 
> BOOST_SERIALIZATION_ASSUME_ABSTRACT(Message);
> 
> //////////////////////////////////////////////
> // ----------------> MessageTimer
> 
> #include <boost/serialization/string.hpp>
> 
> using std::string;
> 
> class MessageTimer : public Message {
>     friend class boost::serialization::access;
> public:
>     MessageTimer(int x) : event(x){
>     }
> 
>     MessageTimer() : event(0){
>     }
> 
>     virtual ~MessageTimer(){
>     }
>     
>     virtual void virtualfunc(){
>     }
>     
> private:
>     int event;
> 
>     template<class Archive>
>     void serialize(Archive& y, const unsigned int version){
>         boost::serialization::base_object<Message>(*this);
>         boost::serialization::void_cast_register<MessageTimer, Message> ();
>         y & event;
>     }
> };
> 
> //////////////////////////////////////////////
> // ----------------> Serialization
> 
> #include <iostream>
> #include <sstream>
> #include <ios>
> #include <boost/archive/polymorphic_binary_oarchive.hpp>
> #include <boost/archive/polymorphic_binary_iarchive.hpp>
> #include <boost/serialization/utility.hpp>
> #include <boost/serialization/serialization.hpp>
> #include <boost/serialization/tracking.hpp>   
> #include <boost/serialization/base_object.hpp>
> #include <boost/serialization/export.hpp>
> #include <boost/serialization/factory.hpp>
> 
> 
> ///////// COMMENT THE NEXT LINE TO MAKE IT COMPILE!!!
> BOOST_CLASS_EXPORT(MessageTimer);
> ///////////////////////////////////////////////////////
> 
> BOOST_CLASS_TRACKING(MessageTimer, boost::serialization::track_never);
> 
> int main(){
> 
>     Message* msg = new MessageTimer( 5 );
> 
>     std::stringstream archiveStream (std::ios_base::binary | 
> std::ios_base::out);
>     {   
>         boost::archive::polymorphic_binary_oarchive    outputArchive 
> (archiveStream);
>         outputArchive & msg;
>     }   
> 
>     string data= archiveStream.str    ();
>     std::cout << data << std::endl;   
> 
>     return 0;
> }
> 
> 
>> Robert Ramy
>>
>> Christoph Mayer wrote:
>>> Hi,
>>>
>>> when using Boost v1.37 I get a problem with the serialization library
>>> that did not appear before. The following linker error occurs:
>>>
>>>> undefined reference to
>>> `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: 
>>>
>>>> polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch 
>>>>
>>> ive::binary_oarchive, char, std::char_traits<char> > >
>>>>>> :~archive_pointer_oserializer()'
>>> The error does not appear when I omit the class registration using
>>> BOOST_CLASS_EXPORT_GUID.
>>>
>>> As far as I understand the error, the linker can't find the d'tor for
>>> the singleton where the classes get registered. Below you can find the
>>> complete linker output.
>>>
>>> Any help is appreciated,
>>> Chris
>>
>>
>>
>> _______________________________________________
>> Boost-users mailing list
>> Boost-users_at_[hidden]
>> http://lists.boost.org/mailman/listinfo.cgi/boost-users
> 

-- 
Dipl.-Inform. Christoph P. Mayer
Institute of Telematics, University of Karlsruhe (TH)
Zirkel 2, 76128 Karlsruhe, Germany
Phone: [phone], Email: mayer_at_[hidden]
Web: http://www.tm.uka.de/~mayer/