I’m trying to compile C code with python 3.11.5 64 bit with Mingw. I’m using Windows 10. but I’m getting the errors from undefined references. I was able to compile with python3.11 but with 32 bits. But I need it to be 64-bit, because I’ll be calling python functions that use libraries that only 64-bit supports, such as ultralytis.

The code is this:

// main.c
#include <Python.h>
#include <stdlib.h>
#include <stdio.h> // Adding required inclusion for printf
int main() {
    // Initialize the Python interpreter
    Py_Initialize();
    // Import the Python module that contains our functions
    PyObject *pModule = PyImport_ImportModule("funcoes_python");
    // Checks if the import was successful
    if (pModule != NULL) {
        // Gets the references to the functions we want to call
        PyObject *pFuncSoma = PyObject_GetAttrString(pModule, "soma");
        PyObject *pFuncSubtracao = PyObject_GetAttrString(pModule, "subtracao");
        // Call the functions and print the results
        if (pFuncSoma && PyCallable_Check(pFuncSoma)) {
            PyObject *pArgs = PyTuple_Pack(2, PyLong_FromLong(10), PyLong_FromLong(5));
            PyObject *pResult = PyObject_CallObject(pFuncSoma, pArgs);
            long result = PyLong_AsLong(pResult);
            printf("Soma: %ldn", result);
            Py_XDECREF(pArgs);
            Py_XDECREF(pResult);
        }
        if (pFuncSubtracao && PyCallable_Check(pFuncSubtracao)) {
            PyObject *pArgs = PyTuple_Pack(2, PyLong_FromLong(10), PyLong_FromLong(5));
            PyObject *pResult = PyObject_CallObject(pFuncSubtracao, pArgs);
            long result = PyLong_AsLong(pResult);
            printf("Soma: %ldn", result);
            Py_XDECREF(pArgs);
            Py_XDECREF(pResult);
        }
        // Release references
        Py_XDECREF(pFuncSoma);
        Py_XDECREF(pFuncSubtracao);
    } else {
        PyErr_Print();
        
    }
    // Finaliza o interpretador Python
    Py_Finalize();
    return 0;
}

The Python functions I’m calling in C are in the code below:

// funcoes_python.c
# funcoes_python.py

def soma(a, b):
    return a + b

def subtracao(a, b):
    return a - b

But when I compile:

g++ -o main main.c -L C:Usersdossaanaconda3envsautosarlibs -lpython3 -I C:Usersdossaanaconda3envsautosarinclude

I catch these errors:

main.o:main.c:(.text+0x28): undefined reference to `_imp___Py_Dealloc'  
main.o:main.c:(.text+0x5c): undefined reference to `_imp__Py_Initialize'
main.o:main.c:(.text+0x6a): undefined reference to `_imp__PyImport_ImportModule' 
main.o:main.c:(.text+0x8f): undefined reference to `_imp__PyObject_GetAttrString'
main.o:main.c:(.text+0xa9): undefined reference to `_imp__PyObject_GetAttrString'
main.o:main.c:(.text+0xc3): undefined reference to `_imp__PyCallable_Check'
main.o:main.c:(.text+0xe9): undefined reference to `_imp__PyLong_FromLong' 
main.o:main.c:(.text+0xf9): undefined reference to `_imp__PyLong_FromLong'
main.o:main.c:(.text+0x10f): undefined reference to `_imp__PyTuple_Pack'
main.o:main.c:(.text+0x129): undefined reference to `_imp__PyObject_CallObject'
main.o:main.c:(.text+0x13b): undefined reference to `_imp__PyLong_AsLong'
main.o:main.c:(.text+0x181): undefined reference to `_imp__PyCallable_Check'
main.o:main.c:(.text+0x1a7): undefined reference to `_imp__PyLong_FromLong'
main.o:main.c:(.text+0x1b7): undefined reference to `_imp__PyLong_FromLong'
main.o:main.c:(.text+0x1cd): undefined reference to `_imp__PyTuple_Pack'
main.o:main.c:(.text+0x1e7): undefined reference to `_imp__PyObject_CallObject'
main.o:main.c:(.text+0x1f9): undefined reference to `_imp__PyLong_AsLong'
main.o:main.c:(.text+0x24a): undefined reference to `_imp__PyErr_Print'
main.o:main.c:(.text+0x251): undefined reference to `_imp__Py_Finalize'
collect2.exe: error: ld returned 1 exit status

Whereas in fact it should have sum and operation outputs. So how should I compile this function call, using python 3.11.5 64 bit?