Creating a DLL and compiling with C

Notes on creating a DLL and compiling C

Library

Source file

// gcd.c
int gcd(int a, int b){
   return !b ? a : gcd(b, a % b);
}

Header file

// gcd.h
#ifndef TEST_H
#define TEST_H

int gcd(int a, int b);

#endif

Program

#include <stdio.h>
#include "gcd.h"

int main(void){
   printf("%d\n", gcd(24, 36));
}

Compilation

Creating the DLL

gcc gcd.c -shared -o gcd.dll

Compile

gcc main.c -lgcd -L.