Re: [Boost-users] [boost.serialization] shared object plugin

Subject: Re: [Boost-users] [boost.serialization] shared object plugin
From: Giampiero Gabbiani (giampiero_at_[hidden])
Date: 2012-08-08 02:41:51

Hi Robert,
I tried the test_dll_plugin (with CMAKE under Linux) that seems to cover my 
case.

add_executable(test_dll_plugin test_dll_plugin.cpp polymorphic_base.cpp)
target_link_libraries(test_dll_plugin dl boost_serialization 
boost_filesystem)

add_library(plugin_polymorphic_derived2 SHARED polymorphic_derived2.cpp)

it compiles (under Linux) but during execution I get:

test_dll_plugin: /usr/include/boost/serialization/singleton.hpp:137: static 
T& boost::serialization::singleton<T>::get_mutable_instance() [with T = 
boost::archive::detail::extra_detail::guid_initializer<polymorphic_derived2>]: 
Assertion `! is_locked()' failed.

If I make an ldd of both the executable

ldd test_dll_plugin
linux-vdso.so.1 =>  (0x00007fff0d56d000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007f547aaab000)
libboost_serialization-1_49.so.1.49.0 => 
/usr/lib64/libboost_serialization-1_49.so.1.49.0 (0x00007f547a835000)
libboost_filesystem-1_49.so.1.49.0 => 
/usr/lib64/libboost_filesystem-1_49.so.1.49.0 (0x00007f547a610000)
libstdc++.so.6 => /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.3/libstdc++.so.6 
(0x00007f547a301000)
libm.so.6 => /lib64/libm.so.6 (0x00007f547a07d000)
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f5479e66000)
libc.so.6 => /lib64/libc.so.6 (0x00007f5479ad4000)
libboost_system-1_49.so.1.49.0 => /usr/lib64/libboost_system-1_49.so.1.49.0 
(0x00007f54798d0000)
/lib64/ld-linux-x86-64.so.2 (0x00007f547acaf000)

and the shared object

ldd libplugin_polymorphic_derived2.so 
linux-vdso.so.1 =>  (0x00007fffd332b000)
libstdc++.so.6 => /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.3/libstdc++.so.6 
(0x00007ffa4936c000)
libm.so.6 => /lib64/libm.so.6 (0x00007ffa490e7000)
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007ffa48ed0000)
libc.so.6 => /lib64/libc.so.6 (0x00007ffa48b3e000)
/lib64/ld-linux-x86-64.so.2 (0x00007ffa498fa000)

the strange is that there is no dynamic linking to libboost_serialization 
inside the libplugin_polymorphic_derived2.so.

So ... did I make some error in the project organization or are there any 
comile option or define I missed?

I wonder - for example - if I should link the executable against the 
multithread version of the serialization library (I guess not ...).

Many thanks
Giampiero

> Giampiero Gabbiani wrote:
> 
>> So far, is there a complete example of boost.serialization of plugins
>> with private implementation in shared object?
> 
> There are some tests and demo for this case.  Have you checked
> in the libs/serialization/test and libs/serialization/example directories?
> 
> Robert Ramey