From 8b0b80000818199ea623897b1ad3705b657983c6 Mon Sep 17 00:00:00 2001
From: Tiger Wang <ziwei.tiger@outlook.com>
Date: Sun, 31 May 2020 20:26:50 +0100
Subject: Configurable LTO (#4755)

---
 CMakeLists.txt | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

(limited to 'CMakeLists.txt')

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5c16c0e40..6b0ce4afa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -97,11 +97,11 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
-# The need for speed (in Release)
-include(CheckIPOSupported)
-check_ipo_supported(RESULT IPO_SUPPORTED)
-if(IPO_SUPPORTED)
-	set(CMAKE_INTERPROCEDURAL_OPTIMIZATION_RELEASE ON)
+# The need for speed (in Release):
+if(WHOLE_PROGRAM_OPTIMISATION)
+	include(CheckIPOSupported)
+	check_ipo_supported(RESULT IPO_SUPPORTED)
+	set(CMAKE_INTERPROCEDURAL_OPTIMIZATION_RELEASE ${IPO_SUPPORTED})
 endif()
 
 # Static CRT
-- 
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