From 9df748972796a3c449b0ac0cb10163662dd4ee5c Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Tue, 28 Feb 2023 15:49:59 +0100
Subject: [PATCH] Fix using Vulkan SDK header from system when cross-compiling

---
 .../Vulkan/GraphicsDeviceVulkan.Build.cs              | 11 ++++++++---
 Source/ThirdParty/volk/volk.Build.cs                  |  2 +-
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/Source/Engine/GraphicsDevice/Vulkan/GraphicsDeviceVulkan.Build.cs b/Source/Engine/GraphicsDevice/Vulkan/GraphicsDeviceVulkan.Build.cs
index b2780f7ca..252652978 100644
--- a/Source/Engine/GraphicsDevice/Vulkan/GraphicsDeviceVulkan.Build.cs
+++ b/Source/Engine/GraphicsDevice/Vulkan/GraphicsDeviceVulkan.Build.cs
@@ -88,10 +88,12 @@ public sealed class VulkanSdk : Sdk
     /// <summary>
     /// Tries the get includes folder path (header files). This handles uppercase and lowercase installations for all platforms.
     /// </summary>
+    /// <param name="platform">Target platform hint.</param>
     /// <param name="includesFolderPath">The includes folder path.</param>
     /// <returns>True if got valid folder, otherwise false.</returns>
-    public bool TryGetIncludePath(out string includesFolderPath)
+    public bool TryGetIncludePath(TargetPlatform platform, out string includesFolderPath)
     {
+        includesFolderPath = string.Empty;
         if (IsValid)
         {
             var vulkanSdk = RootPath;
@@ -99,6 +101,11 @@ public sealed class VulkanSdk : Sdk
             // Use system-installed headers
             if (vulkanSdk.EndsWith("/include") && Directory.Exists(vulkanSdk))
             {
+                if (platform != Flax.Build.Platform.BuildTargetPlatform)
+                {
+                    Log.Warning(string.Format("Cannot use system-installed VulkanSDK at {0} when building for platform {1}", vulkanSdk, platform));
+                    return false;
+                }
                 includesFolderPath = vulkanSdk;
                 return true;
             }
@@ -123,8 +130,6 @@ public sealed class VulkanSdk : Sdk
             foreach (var include in includes)
                 Log.Warning(string.Format("No Vulkan header files in {0}", include));
         }
-
-        includesFolderPath = string.Empty;
         return false;
     }
 }
diff --git a/Source/ThirdParty/volk/volk.Build.cs b/Source/ThirdParty/volk/volk.Build.cs
index 8de605d7e..0b5e4d1c0 100644
--- a/Source/ThirdParty/volk/volk.Build.cs
+++ b/Source/ThirdParty/volk/volk.Build.cs
@@ -48,7 +48,7 @@ public class volk : ThirdPartyModule
         }
 
         string includesFolderPath;
-        if (VulkanSdk.Instance.TryGetIncludePath(out includesFolderPath))
+        if (VulkanSdk.Instance.TryGetIncludePath(options.Platform.Target, out includesFolderPath))
         {
             options.PublicIncludePaths.Add(includesFolderPath);
         }