I have this code of mytest.cpp to try calling some class from Standby.py python file.

#include <iostream>
#include <cstdlib>
#include <string>
#include <array>
#include <sstream>
#include <unistd.h>  // Required for sleep() function
#include <Python.h>

// Function to show available commands
void showUsage() {
    std::cout << "  standby         - Put the system into standby mode\n";
    std::cout << "  reboot         - Send the system into shutdown mode\n";
}

// Function to execute the provided command
void executeCommand(const std::string &command) {
    PyObject* myModuleString = PyLong_FromString((char*)"/usr/lib/enigma2/python/Screens/Standby.py");
    PyObject* myModule = PyImport_Import(myModuleString);
    PyObject* myFunction = PyObject_GetAttrString(myModule,(char*)"Standby");
    if (command == "standby") {
        myFunction;
    }
}

// Main function
int main(int argc, char *argv[]) {
    if (argc != 2) {
        showUsage();
        return 1;
    }

    std::string command = argv[1];
    executeCommand(command);

    return 0;
}

And when i try to compile it with this command

arm-linux-gnueabihf-g++ -o Bcmd.so Bcmd.cpp

I have got this error

cmd.cpp:7:10: fatal error: Python.h: No such file or directory
    7 | #include <Python.h>
      |          ^~~~~~~~~~
compilation terminated.

and also try this command

arm-linux-gnueabihf-g++ -o Bcmd.so Bcmd.cpp -I/usr/include/python3.12/ -lpython3.12

But I have got

In file included from /usr/include/python3.12/Python.h:12,
                 from Bcmd.cpp:7:
/usr/include/python3.12/pyconfig.h:15:12: fatal error: arm-linux-gnueabihf/python3.12/pyconfig.h: No such file or directory
   15 | #  include <arm-linux-gnueabihf/python3.12/pyconfig.h>
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.

And here are the output of find files

/usr/lib/ccache/arm-linux-gnueabihf-g++
/usr/bin/arm-linux-gnueabihf-g++

/usr/libexec/gcc-cross/arm-linux-gnueabihf
/usr/share/gdb/auto-load/usr/arm-linux-gnueabihf
/usr/arm-linux-gnueabihf
/usr/arm-linux-gnueabihf/include/c++/13/arm-linux-gnueabihf
/usr/arm-linux-gnueabihf/include/finclude/arm-linux-gnueabihf
/usr/lib/arm-linux-gnueabihf
/usr/lib/gcc-cross/arm-linux-gnueabihf

/usr/include/python3.12/Python.h

/usr/include/x86_64-linux-gnu/python3.12/pyconfig.h
/usr/include/python3.12/pyconfig.h

How to fix this issue ?!

P.s: I am using Ubuntu 24.04 And I was installed (g++-arm-linux-gnueabihf, g++-aarch64-linux-gnu and g++-mipsel-linux-gnu) to compile 3 files to using on receiver system (Arm, aarch64 and mipsel)