Feb 12, 2013

Using C libraries with Go.

Here’s a simple example of how to use a C library from Go. I made a small library called libfoo.


#include "libfoo.h"
int foo() {
    return 1;


int foo();

Of course, you have to compile that as a shared object with GCC.

$ gcc -shared libfoo.c -o libfoo.so

Make sure you copy over the binary to /usr/lib/ and copy the header to /usr/include/.

The Go file.

package main

#cgo LDFLAGS: -lfoo
#include <libfoo/libfoo.h>
import "C"

import "fmt"

func main() {
    fmt.Println("From libfoo: ", C.foo())

…and that’s it. I’m playing around with libguestfs and libvirt using Go. We’ll see how that Goes. The puns never end!

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