From b33eaf881d9c6356a6a1df51158c8da37d06f3c0 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Wed, 29 Aug 2018 05:39:01 -0600
Subject: [PATCH] apps/system/cu:  Fix undefined SIGKILL if CONFIG_SIG_DEFUALT
 is not defined.

---
 system/cu/cu_main.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/system/cu/cu_main.c b/system/cu/cu_main.c
index c909d3014..0d70cf3a7 100644
--- a/system/cu/cu_main.c
+++ b/system/cu/cu_main.c
@@ -61,6 +61,14 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
+#ifndef SIGKILL
+#  define SIGKILL 9
+#endif
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
 enum parity_mode
 {
   PARITY_NONE,