Compiling Swift With C Code

makefile

default: app

app: c.o s.o
	swiftc -o app c.o s.o

c.o: test.h test.c
	clang test.c -o c.o -c

s.o: test.swift
	swiftc test.swift -o s.o -c -import-objc-header test.h

test.c

#include <stdio.h>

void test()
{
    printf("Hello, World!\n");
}

test.h

#ifndef TEST_H
#define TEST_H

void test();

#endif

test.swift

test()