From c066ab566486f2ec20db20c8b451c6b24736334a Mon Sep 17 00:00:00 2001
From: Andrew Walbran <qwandor@google.com>
Date: Fri, 20 Jan 2023 10:56:30 +0000
Subject: [PATCH] Mention other ABI options.

---
 src/unsafe/extern-functions.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/unsafe/extern-functions.md b/src/unsafe/extern-functions.md
index e3f2f046..bc7f2eb6 100644
--- a/src/unsafe/extern-functions.md
+++ b/src/unsafe/extern-functions.md
@@ -22,4 +22,7 @@ This is usually only a problem for extern functions which do things with pointer
 violate Rust's memory model, but in general any C function might have undefined behaviour under any
 arbitrary circumstances.
 
+The `"C"` in this example is the ABI;
+[other ABIs are available too](https://doc.rust-lang.org/reference/items/external-blocks.html).
+
 </details>