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 succesful (or at least I was not given any errors while
doing the compile)
5. I searched on the internet and the closest thing I can find is the
following: http://bugs.python.org/issue4709
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);
}
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