构建Go程序时使用LDFLAGS链接C代码报错的解决方案

// #cgo CFLAGS: -I. -fPIC
// #cgo LDFLAGS: -lstdc++ -w -hostobj -L. libsomething.a
// #include "something.h"
// #include <stdlib.h>
import "C"

import "fmt"

func main() {
    fmt.Println("Hello, C!")
}

// #cgo CFLAGS: -I. -fPIC
// #cgo LDFLAGS: -lstdc++ -w -linkmode=external -L. libsomething.a
// #include "something.h"
// #include <stdlib.h>
import "C"

import "fmt"

func main() {
    fmt.Println("Hello, C!")
}

// something.h
#ifndef SOMETHING_H
#define SOMETHING_H

int something_function();

#endif

// something.c
#include "something.h"

int something_function() {
  return 42;
}

package main

// #cgo CFLAGS: -I. -fPIC
// #cgo LDFLAGS: -lstdc++ -w -linkmode=external -L. -lsomething
// #include "something.h"
import "C"

import "fmt"

func main() {
  result := C.something_function()
  fmt.Println("Result from C:", result)
}

gcc -c something.c -o something.o
ar rcs libsomething.a something.o

go build main.go

./main

Result from C: 42