[C++-sig] Boost Python Question - Multiple Classes and Modules not appearing as attribute

[Jon Lederman]

Hi,

Thanks for the response.  However, this example doesn’t work for me either if I set the shared object file to zoo.so.  It doesn’t find the animal attribute:

http://pyengr.readthedocs.io/en/latest/inter/bpy

Can you explain why?

Thanks.

Jon


> On Sep 9, 2016, at 4:07 AM, Holger Joukl <Holger.Joukl at LBBW.de> wrote:
> 
> Hi,
> 
> "Cplusplus-sig" <cplusplus-sig-bounces+holger.joukl=lbbw.de at python.org>
> schrieb am 09.09.2016 02:33:57:
> 
>> Hi,
>> 
>> And here is yet another person who seems to encounter the same issue:
>> http://stackoverflow.com/questions/9140572/c-boost-python-2-problems
>> 
>> -Jon
> 
> Python expects an init function for extension modules named initNAME
> where NAME is the name of the extension module, i.e. NAME.so.
> (see https://docs.python.org/2/extending/extending.html)
> 
> BOOST_PYTHON_MODULE is boost.python's macro for automagically giving you
> such
> an init function.
> 
> So in the directives
> - in the boost.python wrapper code: BOOST_PYTHON_MODULE(NAME)
> - in the Jamroot file: python-extension NAME
> (or maybe if you compile without bjam, in your g++ link step the -o
> Parameter:
> g++ -shared -oNAME.so -Wl,-h -Wl,NAME.so ...
> # don't know if the SONAME setting (-Wl,-h -Wl,NAME.so) must also match as
> # Python dlopen()s the extension)
> 
> NAME must be consistent.
> 
> Holger
> 
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