From ed09dddf0906ee6443683322713bceb8b9cdd3fb Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Sun, 24 Sep 2017 02:54:35 +0900
Subject: [PATCH] jni: Add comment

---
 internal/jni/jni_android.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/internal/jni/jni_android.go b/internal/jni/jni_android.go
index d56b4afc7..ee45b3005 100644
--- a/internal/jni/jni_android.go
+++ b/internal/jni/jni_android.go
@@ -10,6 +10,9 @@ package jni
 #include <jni.h>
 #include <stdlib.h>
 
+// These definitions are duplicated with those in ctx_android.go of golang.org/x/mobile/internal/mobileinit package.
+// To be exact, this might cause undefined behavior, but some compilers including GCC work as a common extension.
+// (J.5.11 Multiple external definitions)
 JavaVM* current_vm;
 jobject current_ctx;