From b5f48d8343889490374e1a70a340da1d3b9f71aa Mon Sep 17 00:00:00 2001
From: Rodrigo Reichert <rodrigo.reichert@swift-nav.com>
Date: Wed, 8 Jul 2020 17:40:41 +1000
Subject: [PATCH] updated cmake script to conform to system header include
 configuration

---
 CMakeLists.txt | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 33a1c37..77aed5b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,13 +3,10 @@ cmake_minimum_required(VERSION 2.8)
 project(variant CXX)
 
 add_library(variant INTERFACE)
-if(NOT CMAKE_CROSSCOMPILING OR THIRD_PARTY_INCLUDES_AS_SYSTEM)
-  target_include_directories(variant
-      SYSTEM INTERFACE $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
-      )
+if (DEFINED THIRD_PARTY_INCLUDES_AS_SYSTEM AND NOT THIRD_PARTY_INCLUDES_AS_SYSTEM)
+  target_include_directories(variant INTERFACE
+      $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>)
 else()
-  target_include_directories(variant
-      INTERFACE $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
-      )
-endif()
-
+  target_include_directories(variant SYSTEM INTERFACE
+      $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>)
+endif()
\ No newline at end of file