From faec9fe579e9b6494bbadb193d14da754ddd25a5 Mon Sep 17 00:00:00 2001
From: SalimTerryLi <lhf2613@gmail.com>
Date: Thu, 9 Jan 2020 22:51:47 +0800
Subject: [PATCH] boards px4/raspberrypi: fix upload AUTOPILOT_HOST

---
 boards/px4/raspberrypi/cmake/upload.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/boards/px4/raspberrypi/cmake/upload.cmake b/boards/px4/raspberrypi/cmake/upload.cmake
index f0ee765a62..ce0472b8a7 100644
--- a/boards/px4/raspberrypi/cmake/upload.cmake
+++ b/boards/px4/raspberrypi/cmake/upload.cmake
@@ -31,7 +31,7 @@
 #
 ############################################################################
 
-if($ENV{AUTOPILOT_HOST})
+if(DEFINED ENV{AUTOPILOT_HOST})
 	set(AUTOPILOT_HOST $ENV{AUTOPILOT_HOST})
 else()
 	set(AUTOPILOT_HOST "raspberrypi")