From 54e0eab236e815fedb3b8268aa502b181542cc8c Mon Sep 17 00:00:00 2001
From: Martin Geisler <martin@geisler.net>
Date: Thu, 5 Dec 2024 12:30:03 -0500
Subject: [PATCH] Add speaker notes to JNI slide (#2495)

Part of #1083.
---
 src/android/interoperability/java.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/android/interoperability/java.md b/src/android/interoperability/java.md
index 3000a42b888..9ab8c644dff 100644
--- a/src/android/interoperability/java.md
+++ b/src/android/interoperability/java.md
@@ -38,3 +38,14 @@ Finally, you can build, sync, and run the binary:
 ```shell
 {{#include ../build_all.sh:helloworld_jni}}
 ```
+
+<details>
+
+- The `unsafe(no_mangle)` attribute instructs Rust to emit the
+  `Java_HelloWorld_hello` symbol exactly as written. This is important so that
+  Java can recognize the symbol as a `hello` method on the `HelloWorld` class.
+
+  - By default, Rust will mangle (rename) symbols so that a binary can link in
+    two versions of the same Rust crate.
+
+</details>