From a7c0ac623420344d20b919ad0d93a9d8efb6934b Mon Sep 17 00:00:00 2001
From: Michael Banther <michaelb@xmos.com>
Date: Wed, 16 Oct 2019 15:58:06 +0100
Subject: [PATCH] Protect configurations that do not include HID functionality
 from HID code.

---
 lib_xua/src/hid/hid.xc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib_xua/src/hid/hid.xc b/lib_xua/src/hid/hid.xc
index 72a4fea6..bdd5aef3 100644
--- a/lib_xua/src/hid/hid.xc
+++ b/lib_xua/src/hid/hid.xc
@@ -5,6 +5,7 @@
 #include "xud_std_requests.h"
 #include "xua_hid.h"
 
+#if( 0 < HID_CONTROLS )
 #define MS_IN_TICKS 100000U
 
 static unsigned s_hidIdleActive = 0U;
@@ -216,3 +217,5 @@ static unsigned HidTimeDiff( const unsigned earlierTime, const unsigned laterTim
 {
   return ( earlierTime < laterTime ) ? laterTime - earlierTime : UINT_MAX - earlierTime + laterTime;
 }
+
+#endif /* ( 0 < HID_CONTROLS ) */