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Re: Major upgrades to SWIG/Python bindings in r15848

From: Justin Erenkrantz <justin_at_erenkrantz.com>
Date: 2005-08-27 10:04:54 CEST

On Sat, Aug 20, 2005 at 02:05:43PM -0400, David James wrote:
> I've committed some major upgrades to SWIG/Python bindings in r15848
> (Merged from the python-bindings-improvements branch).

Given that trunk didn't do squat for me (I ran into similar problems as
Philip did), I switched back to the branch.

However, there's a problem here (both in trunk and the branch): how is
the SWIG generated code supposed to link to anything?

In my setups, linking consistently fails because of undefined symbols
that are defined by Python's libraries. Nowhere do I see any mention of
linking to libpython. Manually defining -lpython2.4 to LSWIGPY works.
(Note that SWIG_PY_LIBS doesn't get used anywhere, AFAICT.)

With previous SWIG versions, we'd link against libswigpy (defined at
configure time as LSWIGPY) - which would link in turn to libpython.
However, with our current setup, I don't see how that is being done.

I don't know if get-py-info.py needs to be 'spruced' up or something
else. (It wasn't touched at all as part of this work; so perhaps it is
not useful anymore?)

% python ./get-py-info.py --libs

% python ./get-py-info.py --link
gcc -pthread -shared

Philip's post contained a configure snippet that is almost identical to
what I get. So, unless I'm missing something, if he tries the branch
(or trunk after merge), I think he's going to get the same problem.

I'm kinda stumped as I feel there's some pieces missing that I'm not
sure where they go or if they are present. -- justin

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Received on Sat Aug 27 10:06:12 2005

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