[Pythonmac-SIG] Extending python in C++

[Chris Barker]

> > I'm trying to extend python with some C++ source, [...]
> >
> > void initdemo()
> > {
> >     Py_InitModule("demo", demoMethods);
> > }
> 
> You need an extern "C" construct for that one, otherwise the symbol
> name will be name-mangled according to the C++ rules.

To be precise, you need:

extern "C" void initdemo()
{
     Py_InitModule("demo", demoMethods);
}

I don't what version of Python or what compiler you're using, but I also
had a problem linking a C++ extension to the Python that came with
Jaguar. this was Jack's response to my problem:

> This just came by on another mailing list. The problem is that 
> the link step is done with "gcc", not "g++", so you have to add 
> the C++ library by hand. The easiest is to add an 
> extra_link_libraries (iirc) flag to the setup.py file.

Honestly, I havn't tried it. I was only using C++ for a few handy syntax
improvements over C, so I just re-wrote my extension in C (I had done
this before Jack posted that tip)

-Chris

-- 
Christopher Barker, Ph.D.
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