From e1588d5375da15ba697054feb976cb3b214caa25 Mon Sep 17 00:00:00 2001
From: Nick Cameron <ncameron@mozilla.com>
Date: Mon, 18 Sep 2017 19:50:42 +1200
Subject: [PATCH] guide: use "C" in `extern` items

---
 guide/items.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/guide/items.md b/guide/items.md
index 15c80bd..25ef268 100644
--- a/guide/items.md
+++ b/guide/items.md
@@ -110,3 +110,10 @@ Use `{}` for the full definition of the macro.
 macro_rules! foo {
 }
 ```
+
+
+### extern items
+
+When writing extern items (such as `extern "C" fn`), always be explicit about
+the ABI. For example, write `extern "C" fn foo ...`, not `extern fn foo ...`, or
+`extern "C" { ... }.