Extending Python 3 with C++ - c++

Question

I'm trying to extend Python 3 using instructions given here and I'm fairly confident I've followed the instructions correctly so far, but it asks me to include this code:
PyMODINIT_FUNC
PyInit_spam(void)
{
PyObject *m;
m = PyModule_Create(&spammodule);
if (m == NULL)
return NULL;
SpamError = PyErr_NewException("spam.error", NULL, NULL);
Py_INCREF(SpamError);
PyModule_AddObject(m, "error", SpamError);
return m;
}
I'm writing this in MSVC++ 2010 and it's warning me that &spammodule is undefined (the name of the module is spammodule.cpp), but it doesn't define it anywhere in the instructions so I assume that it should recognise it automatically as the name of the module.
The full code is:
#include <Python.h>
#include <iostream>
using namespace std;
static PyObject *SpamError;
int main()
{
cout << "Test" << endl;
system("PAUSE");
return(0);
}
static PyObject *spam_system(PyObject *self, PyObject *args)
{
const char *command;
int sts;
if (!PyArg_ParseTuple(args, "s", &command))
return NULL;
sts = system(command);
return PyLong_FromLong(sts);
}
PyMODINIT_FUNC
PyInit_spam(void)
{
PyObject *m;
m = PyModule_Create(&spammodule);
if (m == NULL)
return NULL;
SpamError = PyErr_NewException("spam.error", NULL, NULL);
Py_INCREF(SpamError);
PyModule_AddObject(m, "error", SpamError);
return m;
}

Answer 1

You're still writing C++, so you still need to declare spammodule somewhere. This is given later on the same page:
static struct PyModuleDef spammodule = {
PyModuleDef_HEAD_INIT,
"spam", /* name of module */
spam_doc, /* module documentation, may be NULL */
-1, /* size of per-interpreter state of the module,
or -1 if the module keeps state in global variables. */
SpamMethods
};

Answer 2

No no no, PyModule_Create() accepts a pointer to the module definition structure and has absolutely nothing to do with the name of the source file.