From d3ea5e0328bf83890fd9c464e892ec558f200f12 Mon Sep 17 00:00:00 2001
From: Markus Reitboeck <mrpilot@gmx.net>
Date: Thu, 11 Apr 2019 22:03:56 +0200
Subject: [PATCH] CMake: fix checking if variable is set

CMake documentation:
https://cmake.org/cmake/help/v3.0/command/if.html
---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8ad8f86f72..640e8fde8e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -47,7 +47,7 @@ endif (${CMAKE_CXX_COMPILER_ID} MATCHES "Clang")
 # ================================================================================
 
 # Allow developers to use Boost < 1.48
-if (NOT ${BOOST_MIN_VERSION})
+if (NOT BOOST_MIN_VERSION)
     set(BOOST_MIN_VERSION 1.48)
 endif()