From 1aab3db68b8f5240fb7f01890a945fac72019e0a Mon Sep 17 00:00:00 2001
From: JosiahWI <41302989+JosiahWI@users.noreply.github.com>
Date: Sat, 21 Aug 2021 13:16:31 -0500
Subject: [PATCH] Set policies through CMake 3.9 to allow enabling IPO

---
 CMakeLists.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6552ef70..eb90eaba 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,12 @@
 cmake_minimum_required(VERSION 3.5)
 
+# Set policies up to 3.9 since we want to enable the IPO option
+if(${CMAKE_VERSION} VERSION_LESS 3.9)
+	cmake_policy(VERSION ${CMAKE_VERSION_MAJOR}.${CMAKE_VERSION_MINOR})
+else()
+	cmake_policy(VERSION 3.9)
+endif()
+
 project(Irrlicht
 	VERSION 1.9.0
 	LANGUAGES CXX