From 74bac97f445461fd3b7b25ed5468a4cd74c37872 Mon Sep 17 00:00:00 2001
From: Ari Vuollet <ari.vuollet@goat.moe>
Date: Sat, 6 Dec 2025 00:03:42 +0200
Subject: [PATCH] Deprecate `UseFastPDBLinking`

This is no longer supported in VS2026
---
 Source/Tools/Flax.Build/Build/NativeCpp/LinkEnvironment.cs    | 3 +++
 .../Flax.Build/Platforms/Windows/WindowsToolchainBase.cs      | 4 +++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/Source/Tools/Flax.Build/Build/NativeCpp/LinkEnvironment.cs b/Source/Tools/Flax.Build/Build/NativeCpp/LinkEnvironment.cs
index 58b827a1a..7e5456cac 100644
--- a/Source/Tools/Flax.Build/Build/NativeCpp/LinkEnvironment.cs
+++ b/Source/Tools/Flax.Build/Build/NativeCpp/LinkEnvironment.cs
@@ -59,6 +59,7 @@ namespace Flax.Build.NativeCpp
         /// <summary>
         /// Hints to use fast PDB linking.
         /// </summary>
+        [Obsolete("Not supported in Visual Studio 2026 or later toolchain")]
         public bool UseFastPDBLinking = false;
 
         /// <summary>
@@ -114,6 +115,7 @@ namespace Flax.Build.NativeCpp
         /// <inheritdoc />
         public object Clone()
         {
+#pragma warning disable CS0618 // X is obsolete
             var clone = new LinkEnvironment
             {
                 Output = Output,
@@ -127,6 +129,7 @@ namespace Flax.Build.NativeCpp
                 LinkAsConsoleProgram = LinkAsConsoleProgram,
                 GenerateDocumentation = GenerateDocumentation
             };
+#pragma warning restore CS0618 // X is obsolete
             clone.InputFiles.AddRange(InputFiles);
             clone.DocumentationFiles.AddRange(DocumentationFiles);
             clone.InputLibraries.AddRange(InputLibraries);
diff --git a/Source/Tools/Flax.Build/Platforms/Windows/WindowsToolchainBase.cs b/Source/Tools/Flax.Build/Platforms/Windows/WindowsToolchainBase.cs
index 8d581d986..f7f6bc5f5 100644
--- a/Source/Tools/Flax.Build/Platforms/Windows/WindowsToolchainBase.cs
+++ b/Source/Tools/Flax.Build/Platforms/Windows/WindowsToolchainBase.cs
@@ -951,10 +951,12 @@ namespace Flax.Build.Platforms
                     if (linkEnvironment.DebugInformation)
                     {
                         // Generate debug information
-                        if (Toolset != WindowsPlatformToolset.v140 && linkEnvironment.UseFastPDBLinking)
+#pragma warning disable CS0618 // X is obsolete
+                        if (Toolset >= WindowsPlatformToolset.v141 && Toolset <= WindowsPlatformToolset.v144 && linkEnvironment.UseFastPDBLinking)
                         {
                             args.Add("/DEBUG:FASTLINK");
                         }
+#pragma warning restore CS0618 // X is obsolete
                         else if (linkEnvironment.UseFullDebugInformation)
                         {
                             args.Add("/DEBUG:FULL");