go调用c++ so问题 cgo

Question

test.go
package main

/*
#include "load_so.h"
#cgo LDFLAGS: -L ./ -lload_so
*/
import "C"
import "fmt"

func main() {
fmt.Println("20*30=", C.do_test_so_func(20, 30))
fmt.Println("20+30=", C.dd_test_so_func(20,30))

}

load_so.c
#include "load_so.h"
#include "dlfcn.h"

int do_test_so_func(int a,int b)
{
void* handle;
typedef int (*FPTR)(int,int);

handle = dlopen("./test_so.so", 1);
FPTR fptr = (FPTR)dlsym(handle, "test_so_func");

int result = (*fptr)(a,b);
return result;

}

int dd_test_so_func(int a,int b)
{
void* handle;
typedef int (*FPTR)(int,int);

handle = dlopen("./test_so.so", 1);
FPTR fptr = (FPTR)dlsym(handle, "dd_so_func");

int result = (*fptr)(a,b);
return result;

}

test_so.c
#include "test_so.h"

int test_so_func(int a,int b)
{
return a*b;
}

int dd_so_func(int a,int b){
return a+b;
}

gcc -shared ./test_so.c -o test_so.so

gcc -o libload_so.so -O2 -fPIC -shared load_so.c -ldl

gcc 可以通过
g++不能通过
请有过go 调用c++ so的经验

Answer 1

http://blog.csdn.net/newjueqi/article/details/32131521