From d901c115704456b6b2bddd473fc79de00fc00ed8 Mon Sep 17 00:00:00 2001
From: GoaLitiuM <goalitium@kapsi.fi>
Date: Wed, 13 Jan 2021 20:37:19 +0200
Subject: [PATCH] Add compile flag for whole program optimization

---
 .../Tools/Flax.Build/Build/NativeCpp/CompileEnvironment.cs | 6 ++++++
 .../Flax.Build/Platforms/Windows/WindowsToolchainBase.cs   | 7 +++++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/Source/Tools/Flax.Build/Build/NativeCpp/CompileEnvironment.cs b/Source/Tools/Flax.Build/Build/NativeCpp/CompileEnvironment.cs
index b1159db1c..9939cea53 100644
--- a/Source/Tools/Flax.Build/Build/NativeCpp/CompileEnvironment.cs
+++ b/Source/Tools/Flax.Build/Build/NativeCpp/CompileEnvironment.cs
@@ -56,6 +56,11 @@ namespace Flax.Build.NativeCpp
         /// </summary>
         public bool Optimization = false;
 
+        /// <summary>
+        /// Enables the whole program optimization.
+        /// </summary>
+        public bool WholeProgramOptimization = false;
+
         /// <summary>
         /// Enables functions level linking support.
         /// </summary>
@@ -131,6 +136,7 @@ namespace Flax.Build.NativeCpp
                 RuntimeTypeInfo = RuntimeTypeInfo,
                 Inlining = Inlining,
                 Optimization = Optimization,
+                WholeProgramOptimization = WholeProgramOptimization,
                 FunctionLevelLinking = FunctionLevelLinking,
                 DebugInformation = DebugInformation,
                 UseDebugCRT = UseDebugCRT,
diff --git a/Source/Tools/Flax.Build/Platforms/Windows/WindowsToolchainBase.cs b/Source/Tools/Flax.Build/Platforms/Windows/WindowsToolchainBase.cs
index 0917b5027..79581e391 100644
--- a/Source/Tools/Flax.Build/Platforms/Windows/WindowsToolchainBase.cs
+++ b/Source/Tools/Flax.Build/Platforms/Windows/WindowsToolchainBase.cs
@@ -467,8 +467,11 @@ namespace Flax.Build.Platforms
                     // Frame-Pointer Omission
                     commonArgs.Add("/Oy");
 
-                    // Whole Program Optimization
-                    commonArgs.Add("/GL");
+                    if (compileEnvironment.WholeProgramOptimization)
+                    {
+                        // Whole Program Optimization
+                        commonArgs.Add("/GL");
+                    }
                 }
                 else
                 {