From a0edd51120deddf56167134438c3295c6fc51a19 Mon Sep 17 00:00:00 2001
From: Jason Lin <JasonXJ@users.noreply.github.com>
Date: Mon, 28 Jul 2025 12:29:32 +1000
Subject: [PATCH] Add a note about using rust-bindgen (#2818)

Co-authored-by: Dmitri Gribenko <gribozavr@gmail.com>
---
 src/unsafe-rust/exercise.md | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/unsafe-rust/exercise.md b/src/unsafe-rust/exercise.md
index 208ec97f..14da5368 100644
--- a/src/unsafe-rust/exercise.md
+++ b/src/unsafe-rust/exercise.md
@@ -74,3 +74,13 @@ functions and methods:
 
 {{#include exercise.rs:main}}
 ```
+
+<details>
+
+FFI binding code is typically generated by tools like [bindgen], rather than
+being written manually as we are doing here. However, bindgen can't run in an
+online playground.
+
+</details>
+
+[bindgen]: https://github.com/rust-lang/rust-bindgen