From f81815e48ac1e50dfd434e9eec2e0a270595b205 Mon Sep 17 00:00:00 2001
From: Sacha <xsacha@gmail.com>
Date: Wed, 28 Feb 2018 10:25:25 +1000
Subject: [PATCH] Fix CMake cross-compiling

Without specifying thread count, NUM_THREADS would not be defined and CMake would fail.
This is because core count cannot be determined when cross-compiling.
---
 cmake/system.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmake/system.cmake b/cmake/system.cmake
index 064e7e4f2..3fdd9390c 100644
--- a/cmake/system.cmake
+++ b/cmake/system.cmake
@@ -97,7 +97,7 @@ if (NOT CMAKE_CROSSCOMPILING)
 endif()
 
 if (NOT DEFINED NUM_THREADS)
-  if (NOT NUM_CORES EQUAL 0)
+  if (DEFINED NUM_CORES AND NOT NUM_CORES EQUAL 0)
     # HT?
     set(NUM_THREADS ${NUM_CORES})
   else ()