Golang and C

January 29th, 2015

Golang is all good and sunshine .. untill you need a library which is only available in C / C++

Here is a few note for Golang <-> C binding :

Calling C code from Golang 

//callme.c
#include <stdio.h>

void callme(){
    printf("Called from C");
}

//main.go
package main

//extern void callme()
import "C"


func CallC(){
    C.callme()
}

//Called from C

Calling Go code from C 

//callme.c
#include <stdio.h>
#include <_cgo_export.h>

void callme(){
    GoCall();
}

//main.go
package main

//extern void callme()
import "C"
import "fmt"

//export GoCall
func GoCall(){
    fmt.Println("Called from Go")   
}

func CallC(){
    C.callme()
}

//Called from Go

and of course there is some part where you need to take care of, not everything can be exported to C

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