Porting Oracle C/C++ Code with MinGW

Listing 1 Source code for dllfunc.h, dllfunc.c, and hello.c

dllfunc.h
---------
#ifdef BUILD_DLL
#define EXPORT __declspec(dllexport)
#else
#define EXPORT __declspec(dllimport)
#endif

EXPORT void say_hello (void);


dllfunc.c
---------
#include <stdio.h>
#include "dllfunc.h"

EXPORT void say_hello (void)
{
   printf ("Hello\n");
}

hello.c
-------
#include "dllfunc.h"

int main ()
{
   say_hello ();
   return (0);
}