Hello All,

I'm trying to write my first extension module, and I am getting the following error in my command prompt and I was hoping you all could help me.

I have taken the following steps already:

1. My path is set for mingw/bin as well as python31. 2. There is a file in my disutils folder called disutils.cfg that says [build] compiler = mingw32 3. The instructions in the 3.1 documentation state the following: "These instructions only apply if you’re using a version of Python prior to 2.4.1 with a MinGW prior to 3.0.0 (with binutils-2.13.90-20030111- 1. http://docs.python.org/py3k/install/index.html 2. I am using Python 3.1 and the latest MinGW. 4. I tested gcc/mingw by doing C:\python31>gcc -shared pdv.c -o pdv.dll and the test was successful (or at least I was not given any errors while doing the compile). The pdv is a simple math formula. I am able to use the 64 bit version of this dll in ctypes, but not the 32 version. 5. I searched on the internet and the closest thing I can find is the following: http://bugs.python.org/issue4709 6. I suspected I might be having an issue with 64 bit compatibility, but I can't get the mingw64 bit compiler to run: "error: don't know how to compile C/C++ code on platform 'nt' with 'x86_64-w64-mingw32-gcc' compiler.

I am running Windows 7 64 bit version, I have installed the Python 3.1.2 64 bit interpreter. I have the MinGW32 and the one referenced above as well.

Below you will find the following

One, the error report two,my setup.py file three, the file I am trying to turn into a python extension module by running the following two commands:

python setup.py build python setup.py install

#1

Microsoft Windows [Version 6.1.7600]

Copyright (c) 2009 Microsoft Corporation. All rights reserved.

c:\Python31\Lib\finance>python setup.py build

running build

running build_ext

building 'finance' extension

creating build

creating build\temp.win-amd64-3.1

creating build\temp.win-amd64-3.1\Release

C:\MinGW\bin\gcc.exe -mno-cygwin -mdll -O -Wall -IC:\Python31\include

-IC:\Pytho

n31\PC -c finance.c -o build\temp.win-amd64-3.1\Release\finance.o

finance.c: In function `PyInit_finance':

finance.c:31: warning: implicit declaration of function `Py_Module_Create'

finance.c:31: warning: return makes pointer from integer without a cast

writing build\temp.win-amd64-3.1\Release\finance.def

creating build\lib.win-amd64-3.1

C:\MinGW\bin\gcc.exe -mno-cygwin -shared -s

build\temp.win-amd64-3.1\Release\fin

ance.o build\temp.win-amd64-3.1\Release\finance.def -LC:\Python31\libs

-LC:\Pyth

on31\PCbuild\amd64 -lpython31 -lmsvcr90 -o

build\lib.win-amd64-3.1\finance.pyd

build\temp.win-amd64-3.1\Release\finance.o:finance.c:(.text+0x2b): undefined

ref

erence to `_imp__PyArg_ParseTuple'

build\temp.win-amd64-3.1\Release\finance.o:finance.c:(.text+0x5c): undefined

ref

erence to `_imp__Py_BuildValue'

build\temp.win-amd64-3.1\Release\finance.o:finance.c:(.text+0x74): undefined

ref

erence to `Py_Module_Create'

collect2: ld returned 1 exit status

error: command 'gcc' failed with exit status 1

c:\Python31\Lib\finance>

#2

from distutils.core import setup, Extension

setup(name = "finance",

version = "1.0",

ext_modules = [Extension("finance", ["finance.c"])])

#3

#include <Python.h>

#include <math.h>

static PyObject *

pdv(PyObject *self, PyObject *args)

{

double value, rate, timex, denom, pdvx;

if (!PyArg_ParseTuple(args, "ddd", &value, &rate, &timex))

return NULL;

denom = (double) pow ((1 + rate), (timex));

pdvx = value / denom;

return Py_BuildValue("d", pdvx);

}

PyMethodDef pdvMethods[] = {

{"pdv", pdv, METH_VARARGS, "Returns the Present Discounted Value given

of a single future value"},

{NULL, NULL, 0, NULL}

};

static struct PyModuleDef financemodule = {

PyModuleDef_HEAD_INIT,

"finance", /* name of module */

NULL, /* module documentation, may be NULL */

-1, /* size of per-interpreter state of the module,

or -1 if the module keeps state in global variables. */

pdvMethods

};

PyMODINIT_FUNC

PyInit_finance(void)

{

return Py_Module_Create(&financemodule);

}