From cd4a684214f5396c860e4f8ee16fc2d4b928c14e Mon Sep 17 00:00:00 2001
From: Kai Backman <kaib@golang.org>
Date: Tue, 2 Feb 2010 18:09:07 -0800
Subject: [PATCH] added note about the GOARM env variable

R=rsc, r
CC=golang-dev
https://golang.org/cl/198074
---
 doc/install.html | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/doc/install.html b/doc/install.html
index 5e2cd757f7b..6321ce726e5 100644
--- a/doc/install.html
+++ b/doc/install.html
@@ -86,6 +86,17 @@ plus one optional variable:</p>
 	After installing, you will want to arrange to add this
 	directory to your <code>$PATH</code>, so you can use the tools.
 </dd>
+
+<dt>
+<code>$GOARM</code> (optional, arm, default=6)
+</dt>
+<dd>
+	The ARM architecture version the runtime libraries should target.
+	ARMv6 cores have more efficient synchronization primitives. Setting
+	<code>$GOARM</code> to 5 will compile the runtime libraries using
+	just SWP instructions that work on older architectures as well.
+	Running v6 code on an older core will cause an illegal instruction trap.
+</dd>
 </dl>
 
 <p>