Re: [Boost-users] [serialization] Polymorphic serialization withpolymorphic archives problem...

Subject: Re: [Boost-users] [serialization] Polymorphic serialization withpolymorphic archives problem...
From: Robert Ramey (ramey_at_[hidden])
Date: 2010-02-23 00:41:51

Bogdan wrote:

> 3. serialization files in a separate dll. Both the main executable
> and my dll link with the dll version of the serialization library:
>
>    main.exe
>        my_serialization.dll
>        boost_serialization.dll
>
>    my_serialization.dll
>        boost_serialization.dll
>
> Builds OK but FAILS at runtime , at run time I get a C++ exception
> BEFORE main() in basic_serializer_map.cpp around the line 48:
>
> 'archive_exception::multiple_code_instantiation with the message "code
> instantiated in more than one module - polymorphic_base"'

This would indicate that the serialization for polymorphic_base is included
in BOTH the mainline and the DLL.  Check that the serialization function
is NOT an inline definition. the polymorphic_base.cpp should only be needed
when compiling the DLL.

option 1

include serialization definition for polymorphic_base in 
my_serialization.dll

option 2

include serialization definition for polymorphic_base in it's own dll.

> 4. serialization files in a separate dll. Both the main executable
> and my dll link with the static version of the serialization library:
>
>    main.exe
>        my_serialization.dll
>        boost_serialization.lib
>
>    my_serialization.dll
>        boost_serialization.lib
>
> Builds OK but FAILS at runtime while trying to serialize with the
> following exception thrown in oserializer.hpp(line 424):struct
> polymorphic::save():
>
> 'unregistered void cast class polymorphic_derived1<-polymorphic_base
> in function 'int __cdecl main(int,char *[])''

This is probably failing due to the compiler stripping out code
not explicitly referred to.  Since it's not referrred to, the linking
doesn't include it from the library.

Robert Ramey