Yet another Numeric Swig core dump problem

Edward C. Jones edcjones at erols.com
Fri Aug 10 01:48:16 CEST 2001


The following Python / SWIG / Numeric program dumps core. I use RedHat Linux
on a PC. Python 2.1, Numeric 20.0.0, SWIG 1.1 build 883, gcc 2.96.

The output looks like:

 > testdb.py
called import_array
L11
Segmentation fault (core dumped)
 >KLTfeatures.KLTSelectGoodFeatures()
 >

The program files are:

-----------
testdb.py:

#! /usr/bin/python

import Numeric, KLTfeatures

KLTfeatures.KLTSelectGoodFeatures()

-----------
KLTfeatures.h:

#include "Python.h"
#include "/usr/include/python2.1/Numeric/arrayobject.h"

void KLTSelectGoodFeatures(void);

-----------
KLTfeatures.i:

%module KLTfeatures

%{
#include "KLTfeatures.h"
%}

%init %{
     import_array();
     printf("called import_array\n");

%}

void KLTSelectGoodFeatures(void);

-----------
KLTfeaturesmodule.c:

#include "KLTfeatures.h"

void KLTSelectGoodFeatures()
{    PyArrayObject *pao;
     int dims[2];

     dims[0] = 100;
     dims[1] = 200;
     printf("L11\n");
     pao = (PyArrayObject*) PyArray_FromDims(2, dims, PyArray_UBYTE);
     printf("L17\n");
     Py_DECREF(pao);
}

----------
How to compile:

swig -python KLTfeatures.i
gcc -c -Wall KLTfeaturesmodule.c KLTfeatures_wrap.c -I/usr/include/python2.1
ld -shared KLTfeaturesmodule.o KLTfeatures_wrap.o -o KLTfeatures.so




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