Thanks for all the replies so far. I'm starting to look at SWIG, but
the libraries I want access to are all static. I created a small
interface file and a setup.py file, but when I build it, I get
undefined symbols. It sounds like the pack/unpack struct method is a
little to messy for my tastes. I was looking at the example for
defining a new type, but I wasn't sure how to pass the structure. I
need to look more into the PyArg_ParseTupleAndKeywords and creating a
list to pass into that.
I haven't looked at the ctypes module yet, but it looks like it not one
of the modules Python comes with, so I'm a little reluctant to use it.
Here's my set.py and interface file for my module:
##### setup.py ########
#!/bin/env python
import sys, os
from distutils.core import setup, Extension
OTB_HOME='/vps/otbknox/williams/OTB_2.0'
OTB_INCLDIR=[
os.path.join(OTB_HOME, 'include', 'global'),
os.path.join(OTB_HOME, 'include', 'libinc'),
os.path.join(sys.prefix,'include','python2.3'),
OTB_HOME
]
OTB_LIBDIR=[os.path.join(OTB_HOME, 'lib'),
os.path.join(sys.prefix, 'lib', 'python2.3')]
OTB_LIBS=['cmdline']
setup (name = "OTB_cmdline",
version="1.0",
author="Tim Williams",
ext_modules=[Extension('_OTB_cmdline',
sources=['OTB_cmdline.i'],
include_dirs=OTB_INCLDIR,
library_dirs=OTB_LIBDIR,
libraries=OTB_LIBS,
runtime_library_dirs=[os.path.join(OTB_HOME,'lib')]
)]
)
#############
##### module.i ##########
%module OTB_cmdline
%{
#include <libcmdline.h>
#include <stdext.h>
#include <stdio.h>
%}
extern void cmd_process_options (
int argc,
argv_t argv,
int *leftover_argc,
argv_t * leftover_argv,
CMD_OPTION * options,
uint32 sizeof_options,
int32 verbose);
###############
Here's the output of the build:
####################
python setup.py build --force
running build
running build_ext
building '_OTB_cmdline' extension
swigging OTB_cmdline.i to OTB_cmdline_wrap.c
swig -python -o OTB_cmdline_wrap.c OTB_cmdline.i
/usr/bin/gcc33 -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -fPIC
-I/vps/otbknox/williams/OTB_2.0/include/global
-I/vps/otbknox/williams/OTB_2.0/include/libinc
-I/project/c4i/Users_Share/williams/Linux/include/python2.3
-I/vps/otbknox/williams/OTB_2.0
-I/project/c4i/Users_Share/williams/Linux/include/python2.3 -c
OTB_cmdline_wrap.c -o build/temp.linux-i686-2.3/OTB_cmdline_wrap.o
OTB_cmdline_wrap.c:187: warning: `SWIG_Python_TypeDynamicCast' defined
but notused
OTB_cmdline_wrap.c:199: warning: `SWIG_Python_TypeName' defined but not
used
OTB_cmdline_wrap.c:205: warning: `SWIG_Python_TypeQuery' defined but
not used
OTB_cmdline_wrap.c:444: warning: `SWIG_Python_addvarlink' defined but
not used
OTB_cmdline_wrap.c:551: warning: `SWIG_Python_MustGetPtr' defined but
not used
OTB_cmdline_wrap.c:559: warning: `SWIG_Python_ConvertPacked' defined
but not used
gcc -pthread -shared build/temp.linux-i686-2.3/OTB_cmdline_wrap.o
-L/vps/otbknox/williams/OTB_2.0/lib
-L/project/c4i/Users_Share/williams/Linux/lib/python2.3-Wl,-R/vps/otbknox/williams/OTB_2.0/lib
-lcmdline -o build/lib.linux-i686-2.3/_OTB_cmdline.so
################
After copying the _OTB_cmdline.so file to the directory where
OTB_cmdline.py is, here's what happens when I try to import it:
#############
Python 2.3.2 (#10, Feb 24 2005, 10:59:54)
[GCC 3.2 20020903 (Red Hat Linux 8.0 3.2-7)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import OTB_cmdline
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "OTB_cmdline.py", line 5, in ?
import _OTB_cmdline
ImportError: ./_OTB_cmdline.so: undefined symbol: cmd_process_options
################
Can I only make extensions with shared libraries?
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