From 653ee19c65eeda001b3af4bfe5b15888fc124933 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Tue, 11 Nov 2014 07:00:18 -0600
Subject: [PATCH] Check link target - do nothing if link is already created and
 the target matches the request.  From Freddie Chopin.

---
 nuttx/tools/link.sh | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/nuttx/tools/link.sh b/nuttx/tools/link.sh
index da1e6e7ae..f14e9e5ab 100755
--- a/nuttx/tools/link.sh
+++ b/nuttx/tools/link.sh
@@ -51,6 +51,15 @@ fi
 # report that it does not exist.
 
 if [ -h "${dest}" ]; then
+
+	# If the link is already created (and matches the request) do nothing
+
+	if [ "$(readlink ${dest})" = "${src}" ]; then
+		exit 0
+	fi
+
+	# Otherwise, remove the link
+
 	rm -f "${dest}"
 else