go c语言 混合编程,golang C 混编

简单例子

cGo.go

package main

//#include

//void callC() {

// printf("Calling C code!\n");

//}

import "C"

import "fmt"

func main() {

fmt.Println("A Go statement!")

C.callC()

fmt.Println("Another Go statement!")

}

稍复杂例子

callC.h

#ifndef CALLC_H

#define CALLC_H

void cHello();

void printMessage(char* message);

#endif

callC.c

#include

#include "callC.h"

void cHello() {

printf("Hello from C!\n");

}

void printMessage(char* message) {

printf("Go send me %s\n", message);

}

callC.go

package main

// #cgo CFLAGS: -I${SRCDIR}/callClib

// #cgo LDFLAGS: ${SRCDIR}/callC.a

// #include

// #include

import "C"

import (

"fmt"

"unsafe"

)

func main() {

fmt.Println("Going to call a C function!")

C.cHello()

fmt.Println("Going to call another C function!")

myMessage := C.CString("This is Mihalis!")

defer C.free(unsafe.Pointer(myMessage))

C.printMessage(myMessage)

fmt.Println("All perfectly done!")

}