I am working on a pseudo OS using Rust and c++, I am trying to detect the keys pressed using c++ with ncurses (I am aware that there is a similar crate for Rust) and in the build.rs I have the following code

cc::Build::new()
        .cpp(true)
        .file("src/button.cpp")
        .flag("-lncurses") // Link with ncurses library
        .compile("button.a");

But at the moment of making cargo run I get the following errors:

> undefined reference to `initscr'.
> undefined reference to `cbreak
> undefined reference to `noecho
> undefined reference to `stdscr' 
> undefined reference to `keypad 
> undefined reference to `stdscr' 
> undefined reference to `wgetch'
> undefined reference to `printw'

The code in which the error occurs is as follows:

// This code is provided by ChatGPT for testing purposes

#include <iostream>
#include <ncurses.h>

using namespace std;

extern "C" {

void button() {
initscr();
cbreak();  
noecho(); 
keypad(stdscr, TRUE); 
int key;
while (true) {
key = wgetch(stdscr);
if (key == KEY_DOWN)
printw("Arrow down");
else if (key == KEY_UP)
printw("Arrow up");
else if (key == KEY_LEFT)
printw("Arrow left");
else if (key == KEY_RIGHT)
printw("Arrow right");
else if (key == 'n')
printw("Return");
else if (key == 3)
break;
else if (key < 256)
printw("%c", key);
else
printw("Special character");
printw("n");
refresh(); 
        }
endwin();
    }
}

I am trying not to get these errors when charging run