From 4ca60a090bca2cb95b395690dc82a4187be223e5 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Mon, 25 Sep 2017 17:07:08 -0400
Subject: [PATCH] cmake: mark readline include directories as SYSTEM (thanks,
 Tobias!).

---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ad1441b..83c4541 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -204,7 +204,7 @@ if(PHYSFS_BUILD_TEST)
         if(READLINE_LIBRARY)
             set(HAVE_SYSTEM_READLINE TRUE)
             set(TEST_PHYSFS_LIBS ${TEST_PHYSFS_LIBS} ${READLINE_LIBRARY} ${CURSES_LIBRARY})
-            include_directories(${READLINE_H} ${HISTORY_H})
+            include_directories(SYSTEM ${READLINE_H} ${HISTORY_H})
             add_definitions(-DPHYSFS_HAVE_READLINE=1)
         endif()
     endif()