Call C function in Go | Go语言调用C函数

callee.c

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

void SayHello() {
    printf("Hello, world!\n");
}

callee.h

void SayHello();

caller.go

package main

/*
#cgo CFLAGS: -I.
#cgo LDFLAGS: -L. -lcallee
#include "callee.h"
*/
import "C"

import (
	"fmt"
)

func main() {
	C.SayHello()
	fmt.Println("Success!")
}

Makefile

.DEFAULT_GOAL := run

callee.o: callee.c
	gcc -fPIC -c callee.c

libcallee.so: callee.o
	gcc -shared -o $@ $^

caller: caller.go libcallee.so
	go build caller.go

clean:
	rm -f caller libcallee.so callee.o

run: caller
	./caller