From 2fc2ca765289d11dc2c482c04a364bc45feebd06 Mon Sep 17 00:00:00 2001
From: Aaron Gokaslan <aaronGokaslan@gmail.com>
Date: Wed, 1 Feb 2023 17:06:53 +0000
Subject: [PATCH] [BE]: Fix CMake LTO policy on pytorch (#93388)

Not this is a non-functional change since non of our CIs actually build with LTO.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/93388
Approved by: https://github.com/albanD
---
 CMakeLists.txt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0e2eb06bdcf..74031801fa2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,6 +8,12 @@ cmake_minimum_required(VERSION 3.18 FATAL_ERROR)
 cmake_policy(SET CMP0010 NEW)
 cmake_policy(SET CMP0025 NEW)
 
+# Enables CMake to set LTO on compilers other than Intel.
+cmake_policy(SET CMP0069 NEW)
+# Enable the policy for CMake subprojects.
+# protobuf currently causes issues
+#set(CMAKE_POLICY_DEFAULT_CMP0069 NEW)
+
 # Suppress warning flags in default MSVC configuration.  It's not
 # mandatory that we do this (and we don't if cmake is old), but it's
 # nice when it's possible, and it's possible on our Windows configs.