UnityのネイティブプラグインをGoで書く #golang #unity ref: http://qiita.com/tenntenn/items/4d3316490a571e5d79ed

file1.txt

$ CGO_ENABLED=1 \
CC=arm-linux-androideabi-gcc \
GOOS=android \
GOARCH=arm \
GOARM=7 \
go build -buildmode=c-shared -o libhoge.so hoge.go

file2.txt

$ cd $GOROOT/src
$ GOROOT_BOOTSTRAP=/path/to/go1.4/ \
GOARM=7 \
CGO_ENABLED=1 \
GOARCH=arm \
CC_FOR_TARGET=`pwd`/../misc/ios/clangwrap.sh \
CXX_FOR_TARGET=`pwd`/../misc/ios/clangwrap.sh ./make.bash

file3.txt

CGO_ENABLED=1 \
GOARCH=arm \
go build -buildmode=c-archive -tags=ios hoge.go

file4.txt

using UnityEngine;
using System.Runtime.InteropServices;

public class Sample : MonoBehaviour
{

#if UNITY_IPHONE
    [DllImport("__Internal")]
#else
    [DllImport("hoge")]
#endif
    private static extern int Hoge();

    void Start()
    {
        var n = Hoge();
        Debug.LogFormat("n = {0}", n); // n = 100
    }
}

hoge.go

package main

import "C"

//export Hoge
func Hoge() int {
    return 100
}

func main() {
}