从c调用go函数时出错

Answer 1

新来这里。试图从 C 调用 go 函数但遇到了一些编译问题

这是 go 脚本

package main

// #cgo CFLAGS: -Wno-error=implicit-function-declaration

// #include <stdlib.h> 

// #include "wrapper.c"

import "C"

//import "unsafe"

import "fmt"

//import "time"

//export dummy

func dummy() int {

    fmt.Println("hi you");

    return 0

}

func main() {

    C.testc()

}

这是包装纸

#include <sys/types.h>

#include <stdio.h>

#include <errno.h>

#include <string.h>

extern int dummy();

void testc(){

    dummy();

}

运行时报错

xyz@xyz-HP:~/learn/go$ go run reader.go 

# command-line-arguments

In file included from $WORK/command-line-arguments/_obj/_cgo_export.c:2:0:

reader.go:30:14: error: conflicting types for ‘dummy’

In file included from reader.go:3:0,

                 from $WORK/command-line-arguments/_obj/_cgo_export.c:2:

./wrapper.c:6:12: note: previous declaration of ‘dummy’ was here

/tmp/go-build528677551/command-line-arguments/_obj/_cgo_export.c:8:7: error: conflicting types for ‘dummy’

In file included from reader.go:3:0,

                 from $WORK/command-line-arguments/_obj/_cgo_export.c:2:

./wrapper.c:6:12: note: previous declaration of ‘dummy’ was here