go 调用c++报错

package main

// #cgo LDFLAGS: -lre2
//
//#include<re2/re2.h>
//#include<re2/filtered_re2.h>
//#include<cstdio>
//#include<iostream>
//#include<re2/set.h>
import "C"
import "fmt"

func main() {
	fmt.Println("hello world")
}

错误信息：

In file included from ./main.go:5:0:
/usr/include/re2/re2.h:184:10: fatal error: algorithm: No such file or directory
 #include <algorithm>
          ^~~~~~~~~~~
compilation terminated.

增加CFLAGS，

#cgo CFLAGS: -x c++

还是报错：

/tmp/go-build3534255395/b001/_x002.o: In function `_GLOBAL__sub_I_main.cgo2.c':
/usr/include/c++/7/iostream:74: undefined reference to `std::ios_base::Init::Init()'
/usr/include/c++/7/iostream:74: undefined reference to `std::ios_base::Init::~Init()'
collect2: error: ld returned 1 exit status

这个应该是链接错误，再修改LDFLAGS， #cgo LDFLAGS: -lstdc++

go build成功。

运行如下：

# ./re2
hello world