golang 通过 cgo 调用 C/C++ 静态库(一次通过)

hello.h

#ifndef HELLO_H_
#define HELLO_H_

#ifdef __cplusplus
extern "C" {
#endif

extern int hello(char *name, int age);

#ifdef __cplusplus
}
#endif

#endif // HELLO_H_

hello.c

#include <stdio.h>
#include <stdlib.h>
#include "hello.h"

int hello(char *name, int age) {
    printf("Hello %s, your age is %d.\n", name, age);
    return age;
}

hello.go

package main

import (
	"fmt"	
	"log"			
	"unsafe"
)

/*
#include <stdio.h>
#include <stdlib.h>
#include "hello.h"

#cgo CFLAGS: -I.
#cgo LDFLAGS: -L. -lhello
*/
import "C"

func main() {

	name := C.CString("jack")
	defer C.free(unsafe.Pointer(name))
	age := C.int(28)
	fmt.Println(name)
	result := C.hello(name, age)
	log.Println("cgo----------->age %d ", result)
}

编译C静态库

gcc -Wall -c hello.c
ar -rv libhello.a hello.o