From 98208e7e95436dc6bee435d6b7e637b4aed7858a Mon Sep 17 00:00:00 2001
From: cosineblast <55855728+cosineblast@users.noreply.github.com>
Date: Wed, 17 Jan 2024 16:49:47 -0300
Subject: [PATCH] Add pragma once to the documentation

---
 doc/cc65.sgml | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/doc/cc65.sgml b/doc/cc65.sgml
index efe48b61b..634195497 100644
--- a/doc/cc65.sgml
+++ b/doc/cc65.sgml
@@ -1681,6 +1681,16 @@ void somefunc2(int, char *);
   </verb></tscreen>
 
 
+<sect1><tt>#pragma once</tt><label="pragma-once"><p>
+
+    This pragma is used to prevent multiple inclusion of a header file.
+    If this pragma is preprocessed in a file, any posterior
+    <tt>#include<tt> which targets the current file will be ignored.
+
+    Two files are considered to be the same by this directive if they
+    share the same absolute path. In the case of symbolic links,
+    the canonical, resolved path is considered instead.
+
 
 <sect>Register variables<label id="register-vars"><p>