From 829b7e612f5f0f0f21ac9ba21799f76eb7aed609 Mon Sep 17 00:00:00 2001
From: Natalia Gimelshein <ngimel@fb.com>
Date: Wed, 8 Mar 2023 19:45:56 +0000
Subject: [PATCH] require cmake 3.18, make policy conditional

---
 CMakeLists.txt | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 64dfe06119f5..68f26a048882 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,8 +1,10 @@
-cmake_minimum_required(VERSION 3.20)
+cmake_minimum_required(VERSION 3.18)
 
+if(POLICY CMP0116)
 # Introduced in cmake 3.20
 # https://cmake.org/cmake/help/latest/policy/CMP0116.html
-cmake_policy(SET CMP0116 OLD)
+  cmake_policy(SET CMP0116 OLD)
+endif()
 
 include(ExternalProject)