[C++-sig] importing issues with c++ shared dynamic libraries (.so)

[Tim Spens]

I have listed the paths to the other libraries in
LD_LIBRARY_PATH but still have the same problem.

--- David A Wagner <David.A.Wagner at jpl.nasa.gov>
wrote:

> Most likely, the dynamic loader is just failing to
> find the dependent 
> .so files because it doesn't
> know where to look for them.  You have to list the
> search paths in 
> LD_LIBRARY_PATH
> (inferring you're using linux) environment variable.
> 
> More info:  man ld.so
> 
> 
> Tim Spens wrote:
> > --- Tim Spens <t_spens at yahoo.com> wrote:
> >
> >   
> >> I'm trying to import multiple c++ shared dynamic
> >> libraries (.so) with inter-dependencies into
> python.
> >>
> >> Then use one of the .so libraries which I've
> added
> >> boost.python wrappers to.  Here's the out put
> from
> >> python...
> >>
> >> using boost 1.33
> >>
> >> Python 2.5.1 (r251:54863, May  2 2007, 16:56:35) 
> >> [GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
> >> Type "help", "copyright", "credits" or "license"
> for
> >> more information.
> >>     
> >>>>> import libxml2
> >>>>> #libxml2.so imported just fine
> >>>>>
> >>>>> import libboost_thread
> >>>>>           
> >> Traceback (most recent call last):
> >>   File "<stdin>", line 1, in <module>
> >> ImportError: dynamic module does not define init
> >> function (initlibboost_thread)
> >>     
> >>>>> import libboost_serialization
> >>>>>           
> >> Traceback (most recent call last):
> >>   File "<stdin>", line 1, in <module>
> >> ImportError: dynamic module does not define init
> >> function (initlibboost_serialization)
> >>     
> >>>>> import libboost_python
> >>>>>           
> >> Traceback (most recent call last):
> >>   File "<stdin>", line 1, in <module>
> >> ImportError: dynamic module does not define init
> >> function (initlibboost_python)
> >>     
> >>>>> import libX
> >>>>>           
> >> Traceback (most recent call last):
> >>   File "<stdin>", line 1, in <module>
> >> ImportError: dynamic module does not define init
> >> function (initlibX)
> >>     
> >>>>> libX.so is a c++ dynamic shared library with
> no
> >>>>>           
> >> boost.python wrappers
> >>     
> >>>>> import libShared
> >>>>>           
> >> Traceback (most recent call last):
> >>   File "<stdin>", line 1, in <module>
> >> ImportError: libShared.so: undefined symbol:
> xmlFree
> >>     
> >>>>> libShared.so is a c++ dynamic shared library
> >>>>>           
> >> with
> >> no boost.python wrappers
> >>     
> >>>>> import libzee
> >>>>>           
> >> Traceback (most recent call last):
> >>   File "<stdin>", line 1, in <module>
> >> ImportError: ./libzee.so: undefined symbol:
> >> _ZTIN5boost10lock_errorE
> >>     
> >>>>> libzee.so is a c++ dynamic shared library with
> >>>>>           
> >> boost.python wrappers added
> >>
> >> I've tried using ld.open but it seems to only
> allow
> >> me
> >> to call specific functions in the libraries and
> >> doesn't allow the libraries to talk to each
> other.
> >>
> >> Any help will be greatly appreciated.
> >>
> >>
> >>     
> >
> > I've just learned that I need to only import my
> > wrapped library, and python should find the
> libraries
> > the wrapped lib is dependent upon when it's
> loaded? 
> > So I added the paths of my c++ libraries and boost
> > libs to the sys.path and env path, but I still
> have
> > the same problem importing my python wrapped c++
> lib
> > because it has dependencies on boost libs.
> >
> >   
> >>>> import libzee
> >>>>         
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> > ImportError: ./libzee.so: undefined symbol:
> > _ZTIN5boost10lock_errorE
> >
> >
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