Compiling error with python/c++ using swig - c++

Question

I am trying to wrap c++ code to python with numpy using swig and a setup-file. I created a rather simple swig file and a setup.py, but when I run (on Windows XP)
python setup.py build -c mingw32
compilation of the shared library fails. I have no clue why, so hopefully someone can point me in the right direction.
What happens is this:
The setup-skript runs swig as it should, and a wrapped goldstein_wrap.cpp is created. Then MinGW is called, and it fails:
C:\MinGW\bin\gcc.exe -mdll -O -Wall -IC:\Programme\Python27\lib\site-packages\numpy\core\include -IC:\Programme\Python27\include -IC:\Programme\Python27\PC -c > goldstein_wrap.cpp -o build\temp.win32-2.7\Release\goldstein_wrap.o -static-libgcc -static-libstdc++
In file included from C:\Programme\Python27\lib\site-packages\numpy\core\include/numpy/ arrayobject.h:14:0,
from goldstein_wrap.cpp:3059:
C:\Programme\Python27\lib\site-packages\numpy\core\include/numpy/ndarrayobject.h:10:1:
Fehler: expected initializer before »extern«
goldstein_wrap.cpp:2954:25: Warnung: »swig_module« definiert, aber nicht verwendet
[-Wunused-variable]
error: command 'gcc' failed with exit status 1
My swig file looks like this:
%module goldstein
%{
#define SWIG_FILE_WITH_INIT
#include "goldstein.h"
%}
/*include numpy typemaps*/
%include "numpy.i"
/*initialize module*/
%init %{
import_array();
%}
%rename(unwrap2d) phase_unwrapping_func;
/* typemaps for the arrays*/
%apply (int DIM1,int DIM2,float* IN_ARRAY2) {(int ysize,int xsize,float* in)};
%apply (int DIM1,int DIM2,unsigned short* IN_ARRAY2) {(int y1,int x1,unsigned short* mask)};
%apply (int DIM1,int DIM2,float* INPLACE_ARRAY2) {(int y2,int x2,float* out),
(int y3,int x3,float* bcuts),
(int y4,int x4,float* res),
(int y5,int x5,float* diff)}
%inline %{
void phase_unwrapping_func(int ysize,int xsize,float* in,int y1,int x1,
unsigned short* mask,int y2,int x2,float* out, int y3,int x3,
float* bcuts,int y4,int x4,float* res, int y5,int x5,float* diff)
{
phase_unwrapping(xsize, ysize, in, mask, out, bcuts, res, diff);
}
%}
And to give really all information, my setup.py:
from distutils.core import setup, Extension
import numpy
try:
np_include = numpy.get_include()
except AttributeError:
np_include = numpy.get_numpy_include()
_goldstein = Extension('_goldstein',
['goldstein.i','goldstein.cpp'],
include_dirs=[np_include], #include python dll
swig_opts=['-c++'], #enable c++ wrapping
extra_compile_args=["-static-libgcc",
"-static-libstdc++"],
)
setup(name='goldstein',
version='1.1',
description='Blubb',
author='Foo',
ext_modules = [_goldstein]
)
And, as demanded, the mentioned lines of the swig-generated file:
Lines 2950 to 2958:
/* -------- TYPES TABLE (BEGIN) -------- */
#define SWIGTYPE_p_char swig_types[0]
static swig_type_info *swig_types[2];
static swig_module_info swig_module = {swig_types, 1, 0, 0, 0, 0};
#define SWIG_TypeQuery(name) SWIG_TypeQueryModule(&swig_module, &swig_module, name)
#define SWIG_MangledTypeQuery(name) SWIG_MangledTypeQueryModule(&swig_module, &swig_module, name)
/* -------- TYPES TABLE (END) -------- */
And lines 3051 to 3060:
#define SWIG_FILE_WITH_INIT
#include "goldstein.h"
#ifndef SWIG_FILE_WITH_INIT
# define NO_IMPORT_ARRAY
#endif
#include "stdio.h"
#include <numpy/arrayobject.h>
void phase_unwrapping_func(int ysize,int xsize,float* in,int y1,int x1,
unsigned short* mask,int y2,int x2,float* out,
int y3,int x3,float* bcuts,int y4,int x4,float* res,
int y5,int x5,float* diff)
{
phase_unwrapping(xsize, ysize, in, mask, out, bcuts, res, diff);
}
Line 3059 is the one including numpy/arrayobject.h. Sorry, I should have thought about that earlier...

Answer 1

Thanks for the hint towards the headerfile, it was a typo in the last line of that file.