golang C 混編

簡單例子

cGo.go

package main//#include <stdio.h>//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!")}

稍複雜例子

callC.h

#ifndef CALLC_H#define CALLC_Hvoid cHello();void printMessage(char* message);#endif

callC.c

#include <stdio.h>#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 <stdlib.h>// #include <callC.h>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!")}