Hi everyone,
I am attempting to convert some time critical code into C to be imported as
a module into python. This is on OS X (10.3.9) using the bundled 2.3.3
version of python.
I am working through the extending python tutorial but am having trouble
wrapping my head around some things which are a little above my knowledge of
C and OS X.
Full code is copied below. But, basically what I've done is created 2
source files, mod.c and sum.c with a header file sum.h (as per the
tutorial).
For compiling, I am doing the following:
[code]
[EMAIL PROTECTED] 14:03:21]$ gcc $PYTHPATH sum.c -o sum.o
[/code]
Where $PYTHPATH
='-I/System/Library/Frameworks/Python.framework/Versions/2.3/include/python2
.3'
So gcc can find python.h
sum.c compiles fine. The wrapper file mod.c, however gives me the
following.
[code]
[EMAIL PROTECTED] 14:03:12]$ gcc $PYTHPATH mod.c -o mod.o
ld: Undefined symbols:
_main
_PyArg_ParseTuple
_Py_BuildValue
_Py_InitModule4
_sum
[/code]
I was under the impression that I should compile the source files, and then
compile a shared library by the following:
[EMAIL PROTECTED] 14:03:14]$ gcc $PYTHPATH mod.o sum.o -o mod.so
However, the compile is pooching out on the compile of mod.c
I am hoping that someone with more experience with this may give me some
tips regarding how to go about this. The code from the tutorial I have
pasted below.
Thanks.
kjm
// ------------------------------------------------------------
// begin sum.c
#include "sum.h"
int sum(int a, int b)
{
return a + b;
}
int main(int argc, char* argv[])
{
return 0;
}
//----------------------------------------------------------
//-----------------------------------------------------------
// being sum.h
int sum(int a, int b);
int main(int argc, char* argv[]);
//-----------------------------------------------------------
//-----------------------------------------------------------
// being mod.c
#undef _DEBUG
#include <Python.h>
#include "sum.h"
static PyObject* mod_sum(PyObject *self, PyObject *args)
{
int a;
int b;
int s;
if (!PyArg_ParseTuple(args,"ii",&a,&b))
return NULL;
s = sum(a,b);
return Py_BuildValue("i",s);
}
static PyMethodDef ModMethods[] = {
{"sum", mod_sum, METH_VARARGS, "Description.."},
{NULL,NULL,0,NULL}
};
PyMODINIT_FUNC initmod(void)
{
PyObject *m;
m = Py_InitModule("mod",ModMethods);
if (m == NULL)
return;
}
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