On Jul 6, 2006, at 7:58 PM, Siddartha Krishnan wrote:
Hi,
I'm new to using SWIG for python. I am having several problems
creating a C++ extension module for python. I am using OS X 10.4 with
python 2.4 and SWIG 1.3.29 (using darwinports).
I can use SWIG and distutils in order to make a C extension module
for python, however, I cannot do so for a C++ extension module - I
get an import error:
mie-15-203:~/swig/class_test siddarthakrishnan$ python mymod.py
Traceback (most recent call last):
File "mymod.py", line 5, in ?
import _mymod
ImportError: Failure linking new module: /Users/siddarthakrishnan/
SWIG/class_test/_mymod.so: Symbol not found: __ZN9SomeClassC1Eii
Referenced from: /Users/siddarthakrishnan/SWIG/class_test/_mymod.so
Expected in: dynamic lookup
The setup.py file is as follows:
# setup.py
from distutils.core import setup, Extension
setup (name = "_mymod",
version = "1.0",
maintainer = "Your Name",
maintainer_email = "[EMAIL PROTECTED]",
description = "Sample Python C++ Extension",
ext_modules = [Extension('_mymod',
sources=['mymod_wrap.cxx'])])
Does anyone know how to create a setup.py file that works with c++
extension modules?
Are you linking with all libraries that are needed for the extension? Your module seems to be missing 'SomeClass::SomeClass(int, int)'.
If you do the link step that setup.py generates manually, but add '- framework Python' and remove '-undefined surpress' you should get a list of all symbols that aren't present in the extension. However, don't build the final version of the extension like that.
Ronald
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