I am trying to compile a simple C extension in Mac to use with Python, and all works well in the command line. Code and gcc command that works are presented below. Now I am trying to build the same extension in Xcode 4.5 (Mac OS10.8), and I tried several target settings for either dylib or static library, but I always get a file that cannot be loaded in Python showing the error:
./myModule.so: unknown file type, first eight bytes: 0x21 0x3C 0x61 0x72 0x63 0x68 0x3E 0x0A
My ultimate target is to create a workspace in XCode with the source code of a C/C++ extension and have python script that calls it in Xcode. So, if I need to debug the C/C++ extension I have XCode debugging capabilities. I am aware that XCode do not debug into Python script, but it can run it, correct ?
gcc -shared -arch i386 -arch x86_64 -L/usr/lib/python2.7 -framework python -I/usr/include/python2.7 -o myModule.so myModule.c -v
#include <Python.h>
/*
* Function to be called from Python
*/
static PyObject* py_myFunction(PyObject* self, PyObject* args)
{
char *s = "Hello from C!";
return Py_BuildValue("s", s);
}
/*
* Another function to be called from Python
*/
static PyObject* py_myOtherFunction(PyObject* self, PyObject* args)
{
double x, y;
PyArg_ParseTuple(args, "dd", &x, &y);
return Py_BuildValue("d", x*y);
}
/*
* Bind Python function names to our C functions
*/
static PyMethodDef myModule_methods[] = {
{"myFunction", py_myFunction, METH_VARARGS},
{"myOtherFunction", py_myOtherFunction, METH_VARARGS},
{NULL, NULL}
};
/*
* Python calls this to let us initialize our module
*/
void initmyModule()
{
(void) Py_InitModule("myModule", myModule_methods);
}
