UnrealEngineUWP/Engine/Source/Programs/UnrealBuildTool/Platform/Windows/UEBuildWindows.cs

// Copyright Epic Games, Inc. All Rights Reserved.

using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using System.IO;
using System.Linq;
using EpicGames.Core;
using System.Diagnostics.CodeAnalysis;
using UnrealBuildBase;
using System.Runtime.Versioning;
using Microsoft.Extensions.Logging;

namespace UnrealBuildTool
{
	/// <summary>
	/// Available compiler toolchains on Windows platform
	/// </summary>
	public enum WindowsCompiler
	{
		/// <summary>
		/// Use the default compiler. A specific value will always be used outside of configuration classes.
		/// </summary>
		Default,

		/// <summary>
		/// Use Clang for Windows, using the clang-cl driver.
		/// </summary>
		Clang,

		/// <summary>
		/// Use the Intel oneAPI C++ compiler
		/// </summary>
		Intel,

		/// <summary>
		/// Visual Studio 2019 (Visual C++ 16.0)
		/// </summary>
		VisualStudio2019,

		/// <summary>
		/// Visual Studio 2022 (Visual C++ 17.0)
		/// </summary>
		VisualStudio2022,
	}


	/// <summary>
	/// Extension methods for WindowsCompilier enum
	/// </summary>
	public static class WindowsCompilerExtensions
	{
		/// <summary>
		/// Returns if this compiler toolchain based on Clang
		/// </summary>
		/// <param name="Compiler">The compiler to check</param>
		/// <returns>true if Clang based</returns>
		public static bool IsClang(this WindowsCompiler Compiler)
		{
			return Compiler == WindowsCompiler.Clang || Compiler == WindowsCompiler.Intel;
		}

		/// <summary>
		/// Returns if this compiler toolchain based on MSVC
		/// </summary>
		/// <param name="Compiler">The compiler to check</param>
		/// <returns>true if MSVC based</returns>
		public static bool IsMSVC(this WindowsCompiler Compiler)
		{
			return Compiler >= WindowsCompiler.VisualStudio2019;
		}
	}


	/// <summary>
	/// Which static analyzer to use
	/// </summary>
	[Obsolete("Replace with StaticAnalyzer. Will be removed in 5.2")]
	public enum WindowsStaticAnalyzer
	{
		/// <summary>
		/// Do not perform static analysis
		/// </summary>
		None,

		/// <summary>
		/// Use the default static analyzer for the selected compiler, if it has one. For
		/// Visual Studio and Clang, this means using their built-in static analysis tools.
		/// Any compiler that doesn't support static analysis will ignore this option.
		/// </summary>
		Default, 

		/// <summary>
		/// Use the built-in Visual C++ static analyzer
		/// </summary>
		VisualCpp = Default,

		/// <summary>
		/// Use PVS-Studio for static analysis
		/// </summary>
		PVSStudio,
		
		/// <summary>
		/// Use clang for static analysis. This forces the compiler to clang.
		/// </summary>
		Clang,
	}

	/// <summary>
	/// Output type for the static analyzer. This currently only works for the Clang static analyzer.
	/// The Clang static analyzer can do either Text, which prints the analysis to stdout, or
	/// html, where it writes out a navigable HTML page for each issue that it finds, per file.
	/// The HTML is output in the same directory as the object fil that would otherwise have
	/// been generated. 
	/// All other analyzers default automatically to Text. 
	/// </summary>
	[Obsolete("Replace with StaticAnalyzerOutputType. Will be removed in 5.2")]
	public enum WindowsStaticAnalyzerOutputType
	{
		/// <summary>
		/// Output the analysis to stdout.
		/// </summary>
		Text,

		/// <summary>
		/// Output the analysis to an HTML file in the object folder.
		/// </summary>
		Html,
	}

	/// <summary>
	/// Available architectures on Windows platform
	/// </summary>
	public enum WindowsArchitecture
	{
		/// <summary>
		/// x64
		/// </summary>
		x64,
		/// <summary>
		/// ARM64
		/// </summary>
		ARM64,
	}

	/// <summary>
	/// Windows-specific target settings
	/// </summary>
	public class WindowsTargetRules
	{
		/// <summary>
		/// The target rules which owns this object. Used to resolve some properties.
		/// </summary>
		TargetRules Target;

		/// <summary>
		/// Version of the compiler toolchain to use on Windows platform. A value of "default" will be changed to a specific version at UBT start up.
		/// </summary>
		[ConfigFile(ConfigHierarchyType.Engine, "/Script/WindowsTargetPlatform.WindowsTargetSettings", "Compiler")]
		[XmlConfigFile(Category = "WindowsPlatform")]
		[CommandLine("-2019", Value = nameof(WindowsCompiler.VisualStudio2019))]
		[CommandLine("-2022", Value = nameof(WindowsCompiler.VisualStudio2022))]
		[CommandLine("-Compiler=")]
		public WindowsCompiler Compiler = WindowsCompiler.Default;

		/// <summary>
		/// Version of the toolchain to use on Windows platform when a non-msvc Compiler is in use, to locate include paths etc.
		/// </summary>
		public WindowsCompiler ToolChain => Compiler.IsMSVC() ? Compiler : WindowsPlatform.GetDefaultCompiler(Target.ProjectFile, Architecture, Target.Logger);

		/// <summary>
		/// Architecture of Target.
		/// </summary>
		public WindowsArchitecture Architecture
		{
			get;
			internal set;
		}
		= WindowsArchitecture.x64;

		/// <summary>
		/// The specific toolchain version to use. This may be a specific version number (for example, "14.13.26128"), the string "Latest" to select the newest available version, or
		/// the string "Preview" to select the newest available preview version. By default, and if it is available, we use the toolchain version indicated by
		/// WindowsPlatform.DefaultToolChainVersion (otherwise, we use the latest version).
		/// </summary>
		[ConfigFile(ConfigHierarchyType.Engine, "/Script/WindowsTargetPlatform.WindowsTargetSettings", "CompilerVersion")]
		[XmlConfigFile(Category = "WindowsPlatform")]
		[CommandLine("-CompilerVersion")]
		public string? CompilerVersion = null;

		/// <summary>
		/// True if we should use the Clang linker (LLD) when we are compiling with Clang, or Intel linker (xilink\xilib) when we are compiling with Intel oneAPI, otherwise we use the MSVC linker.
		/// </summary>
		[ConfigFile(ConfigHierarchyType.Engine, "/Script/WindowsTargetPlatform.WindowsTargetSettings", "bAllowClangLinker")]
		[XmlConfigFile(Category = "WindowsPlatform")]
		[CommandLine("-ClangLinker")]
		public bool bAllowClangLinker = false;
		
		/// <summary>
		/// The specific Windows SDK version to use. This may be a specific version number (for example, "8.1", "10.0" or "10.0.10150.0"), or the string "Latest", to select the newest available version.
		/// By default, and if it is available, we use the Windows SDK version indicated by WindowsPlatform.DefaultWindowsSdkVersion (otherwise, we use the latest version).
		/// </summary>
		[XmlConfigFile(Category = "WindowsPlatform")]
		public string? WindowsSdkVersion = null;

		/// <summary>
		/// Value for the WINVER macro, defining the minimum supported Windows version.
		/// </summary>
		public int TargetWindowsVersion = 0x601;

		/// <summary>
		/// Enable PIX debugging (automatically disabled in Shipping and Test configs)
		/// </summary>
		[ConfigFile(ConfigHierarchyType.Engine, "/Script/WindowsTargetPlatform.WindowsTargetSettings", "bEnablePIXProfiling")]
		public bool bPixProfilingEnabled = true;

		/// <summary>
		/// Enable building with the Win10 SDK instead of the older Win8.1 SDK 
		/// </summary>
		[ConfigFile(ConfigHierarchyType.Engine, "/Script/WindowsTargetPlatform.WindowsTargetSettings", "bUseWindowsSDK10")]
		public bool bUseWindowsSDK10 = false;

		/// <summary>
		/// Enable building with the C++/WinRT language projection
		/// </summary>
		[ConfigFile(ConfigHierarchyType.Engine, "/Script/WindowsTargetPlatform.WindowsTargetSettings", "bUseCPPWinRT")]
		public bool bUseCPPWinRT = false;

		/// <summary>
		/// Enables runtime ray tracing support.
		/// </summary>
		[ConfigFile(ConfigHierarchyType.Engine, "/Script/WindowsTargetPlatform.WindowsTargetSettings", "bEnableRayTracing")]
		public bool bEnableRayTracing = false;

		/// <summary>
		/// The name of the company (author, provider) that created the project.
		/// </summary>
		[ConfigFile(ConfigHierarchyType.Game, "/Script/EngineSettings.GeneralProjectSettings", "CompanyName")]
		public string? CompanyName;

		/// <summary>
		/// The project's copyright and/or trademark notices.
		/// </summary>
		[ConfigFile(ConfigHierarchyType.Game, "/Script/EngineSettings.GeneralProjectSettings", "CopyrightNotice")]
		public string? CopyrightNotice;

		/// <summary>
		/// The product name.
		/// </summary>
		[ConfigFile(ConfigHierarchyType.Game, "/Script/EngineSettings.GeneralProjectSettings", "ProjectName")]
		public string? ProductName;

		/// <summary>
		/// The static analyzer to use.
		/// </summary>
		[XmlConfigFile(Category = "WindowsPlatform")]
		[CommandLine("-StaticAnalyzer")]
		[Obsolete("Replace with TargetRuies.StaticAnalyzer (Xml Category BuildConfiguration). Will be removed in 5.2")]
		public WindowsStaticAnalyzer StaticAnalyzer = WindowsStaticAnalyzer.None;

		/// <summary>
		/// The output type to use for the static analyzer.
		/// </summary>
		[XmlConfigFile(Category = "WindowsPlatform")]
		[CommandLine("-StaticAnalyzerOutputType")]
		[Obsolete("Replace with TargetRuies.StaticAnalyzerOutputType (Xml Category BuildConfiguration). Will be removed in 5.2")]
		public WindowsStaticAnalyzerOutputType StaticAnalyzerOutputType = WindowsStaticAnalyzerOutputType.Text;

		/// <summary>
		/// Enables address sanitizer (ASan). Only supported for Visual Studio 2019 16.7.0 and up.
		/// </summary>
		[XmlConfigFile(Category = "BuildConfiguration", Name = "bEnableAddressSanitizer")]
		[CommandLine("-EnableASan")]
		public bool bEnableAddressSanitizer = false;

		/// <summary>
		/// Whether we should export a file containing .obj to source file mappings.
		/// </summary>
		[XmlConfigFile]
		[CommandLine("-ObjSrcMap")]
		public string? ObjSrcMapFile = null;

		/// <summary>
		/// Provides a Module Definition File (.def) to the linker to describe various attributes of a DLL.
		/// Necessary when exporting functions by ordinal values instead of by name.
		/// </summary>
		public string? ModuleDefinitionFile;

		/// <summary>
		/// Specifies the path to a manifest file for the linker to embed. Defaults to the manifest in Engine/Build/Windows/Resources. Can be assigned to null
		/// if the target wants to specify its own manifest.
		/// </summary>
		public string? ManifestFile;

		/// <summary>
		/// Enables strict standard conformance mode (/permissive-).
		/// </summary>
		[XmlConfigFile(Category = "WindowsPlatform")]
		[CommandLine("-Strict")]
		public bool bStrictConformanceMode = false;

		/// <summary>
		/// Enables updated __cplusplus macro (/Zc:__cplusplus).
		/// </summary>
		[RequiresUniqueBuildEnvironment]
		[XmlConfigFile(Category = "WindowsPlatform")]
		[CommandLine("-UpdatedCPPMacro")]
		public bool bUpdatedCPPMacro = true;

		/// <summary>
		/// Enables inline conformance (Remove unreferenced COMDAT) (/Zc:inline).
		/// </summary>
		[RequiresUniqueBuildEnvironment]
		[XmlConfigFile(Category = "WindowsPlatform")]
		[CommandLine("-StrictInline")]
		public bool bStrictInlineConformance = false;

		/// <summary>
		/// Enables new preprocessor conformance (/Zc:preprocessor).
		/// </summary>
		[XmlConfigFile(Category = "WindowsPlatform")]
		[CommandLine("-StrictPreprocessor")]
		public bool bStrictPreprocessorConformance = false;

		/// <summary>
		/// Enables enum types conformance (/Zc:enumTypes) in VS2022 17.4 Preview 4.0+.
		/// </summary>
		[RequiresUniqueBuildEnvironment]
		[XmlConfigFile(Category = "WindowsPlatform")]
		[CommandLine("-StrictEnumTypes")]
		public bool bStrictEnumTypesConformance = false;

		/// VS2015 updated some of the CRT definitions but not all of the Windows SDK has been updated to match.
		/// Microsoft provides legacy_stdio_definitions library to enable building with VS2015 until they fix everything up.
		public bool bNeedsLegacyStdioDefinitionsLib
		{
			get { return Compiler.IsMSVC() || Compiler.IsClang(); }
		}

		/// <summary>
		/// The stack size when linking
		/// </summary>
		[RequiresUniqueBuildEnvironment]
		[ConfigFile(ConfigHierarchyType.Engine, "/Script/WindowsTargetPlatform.WindowsTargetSettings")]
		public int DefaultStackSize = 12000000;

		/// <summary>
		/// The stack size to commit when linking
		/// </summary>
		[RequiresUniqueBuildEnvironment]
		[ConfigFile(ConfigHierarchyType.Engine, "/Script/WindowsTargetPlatform.WindowsTargetSettings")]
		public int DefaultStackSizeCommit;

		/// <summary>
		/// Determines the amount of memory that the compiler allocates to construct precompiled headers (/Zm).
		/// </summary>
		[XmlConfigFile(Category = "WindowsPlatform")]
		public int PCHMemoryAllocationFactor = 0;

		/// <summary>
		/// Allow the target to specify extra options for linking that aren't otherwise noted here
		/// </summary>
		[XmlConfigFile(Category = "WindowsPlatform")]
		public string AdditionalLinkerOptions = "";

		/// <summary>
		/// Create an image that can be hot patched (/FUNCTIONPADMIN)
		/// </summary>
		public bool bCreateHotPatchableImage
		{
			get { return bCreateHotPatchableImagePrivate ?? Target.bWithLiveCoding; }
			set { bCreateHotPatchableImagePrivate = value; }
		}
		private bool? bCreateHotPatchableImagePrivate;

		/// <summary>
		/// Strip unreferenced symbols (/OPT:REF)
		/// </summary>
		public bool bStripUnreferencedSymbols
		{
			get { return bStripUnreferencedSymbolsPrivate ?? ((Target.Configuration == UnrealTargetConfiguration.Test || Target.Configuration == UnrealTargetConfiguration.Shipping) && !Target.bWithLiveCoding); }
			set { bStripUnreferencedSymbolsPrivate = value; }
		}
		private bool? bStripUnreferencedSymbolsPrivate;
			
		/// <summary>
		/// Merge identical COMDAT sections together (/OPT:ICF)
		/// </summary>
		public bool bMergeIdenticalCOMDATs
		{
			get { return bMergeIdenticalCOMDATsPrivate ?? ((Target.Configuration == UnrealTargetConfiguration.Test || Target.Configuration == UnrealTargetConfiguration.Shipping) && !Target.bWithLiveCoding); }
			set { bMergeIdenticalCOMDATsPrivate = value; }
		}
		private bool? bMergeIdenticalCOMDATsPrivate;

		/// <summary>
		/// Whether to put global symbols in their own sections (/Gw), allowing the linker to discard any that are unused.
		/// </summary>
		public bool bOptimizeGlobalData = true;

		/// <summary>
		/// (Experimental) Appends the -ftime-trace argument to the command line for Clang to output a JSON file containing a timeline for the compile. 
		/// See http://aras-p.info/blog/2019/01/16/time-trace-timeline-flame-chart-profiler-for-Clang/ for more info.
		/// </summary>
		[XmlConfigFile(Category = "WindowsPlatform")]
		public bool bClangTimeTrace = false;

		/// <summary>
		/// Outputs compile timing information so that it can be analyzed.
		/// </summary>
		[XmlConfigFile(Category = "WindowsPlatform")]
		public bool bCompilerTrace = false;

		/// <summary>
		/// Print out files that are included by each source file
		/// </summary>
		[CommandLine("-ShowIncludes")]
		[XmlConfigFile(Category = "WindowsPlatform")]
		public bool bShowIncludes = false;

		/// <summary>
		/// Bundle a working version of dbghelp.dll with the application, and use this to generate minidumps. This works around a bug with the Windows 10 Fall Creators Update (1709)
		/// where rich PE headers larger than a certain size would result in corrupt minidumps.
		/// </summary>
		public bool bUseBundledDbgHelp = true;

		/// <summary>
		/// Settings for PVS studio
		/// </summary>
		public PVSTargetSettings PVS = new PVSTargetSettings();

		/// <summary>
		/// The Visual C++ environment to use for this target. Only initialized after all the target settings are finalized, in ValidateTarget().
		/// </summary>
		internal VCEnvironment? Environment;

		/// <summary>
		/// Directory containing the toolchain
		/// </summary>
		public string? ToolChainDir
		{
			get { return (Environment == null)? null : Environment.ToolChainDir.FullName; }
		}

		/// <summary>
		/// The version number of the toolchain
		/// </summary>
		public string? ToolChainVersion
		{
			get { return (Environment == null)? null : Environment.ToolChainVersion.ToString(); }
		}

		/// <summary>
		/// Root directory containing the Windows Sdk
		/// </summary>
		public string? WindowsSdkDir
		{
			get { return (Environment == null)? null : Environment.WindowsSdkDir.FullName; }
		}


		/// <summary>
		/// Directory containing the NETFXSDK
		/// </summary>
		[SuppressMessage("Interoperability", "CA1416:Validate platform compatibility", Justification = "Manually checked")]
		public string? NetFxSdkDir
		{
			get
			{
				DirectoryReference? NetFxSdkDir;
				if (RuntimePlatform.IsWindows && MicrosoftPlatformSDK.TryGetNetFxSdkInstallDir(out NetFxSdkDir))
				{
					return NetFxSdkDir.FullName;
				}
				return null;
			}
		}

		/// <summary>
		/// Directory containing the DIA SDK
		/// </summary>
		public string? DiaSdkDir
		{
			get { return MicrosoftPlatformSDK.FindDiaSdkDirs(Environment!.Compiler).Select(x => x.FullName).FirstOrDefault(); }
		}

		/// <summary>
		/// Directory containing the IDE package (Professional, Community, etc...)
		/// </summary>
		public string? IDEDir
		{
			get
			{
				try
				{
					return MicrosoftPlatformSDK.FindVisualStudioInstallations(Environment!.Compiler, Target.Logger).Select(x => x.BaseDir.FullName).FirstOrDefault();
				}
				catch(Exception) // Find function will throw if there is no visual studio installed! This can happen w/ clang builds
				{
					return null;
				}
			}
		}

		/// <summary>
		/// When using a Visual Studio compiler, returns the version name as a string
		/// </summary>
		/// <returns>The Visual Studio compiler version name (e.g. "2019")</returns>
		public string GetVisualStudioCompilerVersionName()
		{
			switch (Compiler)
			{
				case WindowsCompiler.Clang:
				case WindowsCompiler.Intel:
				case WindowsCompiler.VisualStudio2019:
				case WindowsCompiler.VisualStudio2022:
					return "2015"; // VS2022 is backwards compatible with VS2015 compiler

				default:
					throw new BuildException("Unexpected WindowsCompiler version for GetVisualStudioCompilerVersionName().  Either not using a Visual Studio compiler or switch block needs to be updated");
			}
		}

		/// <summary>
		/// Constructor
		/// </summary>
		/// <param name="Target">The target rules which owns this object</param>
		internal WindowsTargetRules(TargetRules Target)
		{
			this.Target = Target;

			ManifestFile = FileReference.Combine(Unreal.EngineDirectory, "Build", "Windows", "Resources", String.Format("Default-{0}.manifest", Target.Platform)).FullName;
		}
	}

	/// <summary>
	/// Read-only wrapper for Windows-specific target settings
	/// </summary>
	public class ReadOnlyWindowsTargetRules
	{
		/// <summary>
		/// The private mutable settings object
		/// </summary>
		private WindowsTargetRules Inner;

		/// <summary>
		/// Constructor
		/// </summary>
		/// <param name="Inner">The settings object to wrap</param>
		public ReadOnlyWindowsTargetRules(WindowsTargetRules Inner)
		{
			this.Inner = Inner;
			this.PVS = new ReadOnlyPVSTargetSettings(Inner.PVS);
		}

		/// <summary>
		/// Accessors for fields on the inner TargetRules instance
		/// </summary>
		#region Read-only accessor properties 
		#pragma warning disable CS1591

		public WindowsCompiler Compiler
		{
			get { return Inner.Compiler; }
		}
		
		public WindowsArchitecture Architecture
		{
			get { return Inner.Architecture; }
		}

		public string? CompilerVersion
		{
			get { return Inner.CompilerVersion; }
		}

		public string? WindowsSdkVersion
		{
			get { return Inner.WindowsSdkVersion; }
		}

		public int TargetWindowsVersion
		{
			get { return Inner.TargetWindowsVersion; }
		}

		public bool bPixProfilingEnabled
		{
			get { return Inner.bPixProfilingEnabled; }
		}

		public bool bUseWindowsSDK10
		{
			get { return Inner.bUseWindowsSDK10; }
		}

		public bool bUseCPPWinRT
		{
			get { return Inner.bUseCPPWinRT; }
		}

		public bool bAllowClangLinker
		{
			get { return Inner.bAllowClangLinker; }
		}

		public bool bEnableRayTracing
		{
			get { return Inner.bEnableRayTracing; }
		}

		public string? CompanyName
		{
			get { return Inner.CompanyName; }
		}

		public string? CopyrightNotice
		{
			get { return Inner.CopyrightNotice; }
		}

		public string? ProductName
		{
			get { return Inner.ProductName; }
		}

		[Obsolete("Replace with TargetRuies.StaticAnalyzer (Xml Category BuildConfiguration). Will be removed in 5.2")]
		public WindowsStaticAnalyzer StaticAnalyzer
		{
			get { return Inner.StaticAnalyzer; }
		}

		[Obsolete("Replace with TargetRuies.StaticAnalyzerOutputType (Xml Category BuildConfiguration). Will be removed in 5.2")]
		public WindowsStaticAnalyzerOutputType StaticAnalyzerOutputType
		{
			get { return Inner.StaticAnalyzerOutputType; }
		}

		public bool bEnableAddressSanitizer
		{ 
			get { return Inner.bEnableAddressSanitizer; }
		}

		public string? ObjSrcMapFile
		{
			get { return Inner.ObjSrcMapFile; }
		}

		public string? ModuleDefinitionFile
		{
			get { return Inner.ModuleDefinitionFile; }
		}

		public string? ManifestFile
		{
			get { return Inner.ManifestFile; }
		}

		public bool bNeedsLegacyStdioDefinitionsLib
		{
			get { return Inner.bNeedsLegacyStdioDefinitionsLib; }
		}

		public bool bStrictConformanceMode
		{
			get { return Inner.bStrictConformanceMode; }
		}

		public bool bUpdatedCPPMacro
		{
			get { return Inner.bUpdatedCPPMacro; }
		}

		public bool bStrictInlineConformance
		{
			get { return Inner.bStrictInlineConformance; }
		}

		public bool bStrictPreprocessorConformance
		{
			get { return Inner.bStrictPreprocessorConformance; }
		}

		public bool bStrictEnumTypesConformance
		{
			get { return Inner.bStrictEnumTypesConformance; }
		}

		public int DefaultStackSize
		{
			get { return Inner.DefaultStackSize; }
		}

		public int DefaultStackSizeCommit
		{
			get { return Inner.DefaultStackSizeCommit; }
		}

		public int PCHMemoryAllocationFactor
		{
			get { return Inner.PCHMemoryAllocationFactor; }
		}

		public string AdditionalLinkerOptions
		{
			get { return Inner.AdditionalLinkerOptions; }
		}

		public bool bCreateHotpatchableImage
		{
			get { return Inner.bCreateHotPatchableImage; }
		}

		public bool bStripUnreferencedSymbols
		{
			get { return Inner.bStripUnreferencedSymbols; }
		}

		public bool bMergeIdenticalCOMDATs
		{
			get { return Inner.bMergeIdenticalCOMDATs; }
		}

		public bool bOptimizeGlobalData
		{
			get { return Inner.bOptimizeGlobalData; }
		}

		public bool bClangTimeTrace
		{
			get { return Inner.bClangTimeTrace; }
		}

		public bool bCompilerTrace
		{
			get { return Inner.bCompilerTrace; }
		}

		public bool bShowIncludes
		{
			get { return Inner.bShowIncludes; }
		}

		public string GetVisualStudioCompilerVersionName()
		{
			return Inner.GetVisualStudioCompilerVersionName();
		}

		public bool bUseBundledDbgHelp
		{
			get { return Inner.bUseBundledDbgHelp; }
		}

		public ReadOnlyPVSTargetSettings PVS
		{
			get; private set;
		}

		internal VCEnvironment? Environment
		{
			get { return Inner.Environment; }
		}

		public string? ToolChainDir
		{
			get { return Inner.ToolChainDir; }
		}

		public string? ToolChainVersion
		{
			get { return Inner.ToolChainVersion; }
		}

		public string? WindowsSdkDir
		{
			get { return Inner.WindowsSdkDir; }
		}

		public string? NetFxSdkDir
		{
			get { return Inner.NetFxSdkDir; }
		}

		public string? DiaSdkDir
		{
			get { return Inner.DiaSdkDir; }
		}
		
		public string? IDEDir
		{
			get { return Inner.IDEDir; }
		}

		public string GetArchitectureSubpath()
		{
			return WindowsExports.GetArchitectureSubpath(Architecture);
		}

		#pragma warning restore CS1591
		#endregion
	}

	/// <summary>
	/// Information about a particular Visual Studio installation
	/// </summary>
	[DebuggerDisplay("{BaseDir}")]
	class VisualStudioInstallation
	{
		/// <summary>
		/// Compiler type
		/// </summary>
		public WindowsCompiler Compiler { get; }

		/// <summary>
		/// Version number for this installation
		/// </summary>
		public VersionNumber Version { get; }

		/// <summary>
		/// Base directory for the installation
		/// </summary>
		public DirectoryReference BaseDir { get; }

		/// <summary>
		/// Whether it's a community edition of Visual Studio.
		/// </summary>
		public bool bCommunity { get; }

		/// <summary>
		/// Whether it's a pre-release version of the IDE.
		/// </summary>
		public bool bPreview { get; }

		/// <summary>
		/// Constructor
		/// </summary>
		public VisualStudioInstallation(WindowsCompiler Compiler, VersionNumber Version, DirectoryReference BaseDir, bool bCommunity, bool bPreview)
		{
			this.Compiler = Compiler;
			this.Version = Version;
			this.BaseDir = BaseDir;
			this.bCommunity = bCommunity;
			this.bPreview = bPreview;
		}
	}

	class WindowsPlatform : UEBuildPlatform
	{		
		MicrosoftPlatformSDK SDK;

		/// <summary>
		/// Constructor
		/// </summary>
		/// <param name="InPlatform">Creates a windows platform with the given enum value</param>
		/// <param name="InSDK">The installed Windows SDK</param>
		/// <param name="InLogger">Logger instance</param>
		public WindowsPlatform(UnrealTargetPlatform InPlatform, MicrosoftPlatformSDK InSDK, ILogger InLogger)
			: base(InPlatform, InSDK, InLogger)
		{
			SDK = InSDK;
		}

		/// <summary>
		/// Reset a target's settings to the default
		/// </summary>
		/// <param name="Target"></param>
		public override void ResetTarget(TargetRules Target)
		{
			base.ResetTarget(Target);
		}

		/// <summary>
		/// Creates the VCEnvironment object used to control compiling and other tools. Virtual to allow other platforms to override behavior
		/// </summary>
		/// <param name="Target">Stanard target object</param>
		/// <returns></returns>
		[SupportedOSPlatform("windows")]
		protected virtual VCEnvironment CreateVCEnvironment(TargetRules Target)
		{
			return VCEnvironment.Create(Target.WindowsPlatform.Compiler, Target.WindowsPlatform.ToolChain, Platform, Target.WindowsPlatform.Architecture, Target.WindowsPlatform.CompilerVersion, Target.WindowsPlatform.WindowsSdkVersion, null, Target.WindowsPlatform.bUseCPPWinRT, Target.WindowsPlatform.bAllowClangLinker, Logger);
		}

		/// <summary>
		/// Validate a target's settings
		/// </summary>
		[SupportedOSPlatform("windows")]
		public override void ValidateTarget(TargetRules Target)
		{
			if (Platform == UnrealTargetPlatform.Win64)
			{
				Target.WindowsPlatform.Architecture = WindowsArchitecture.x64;
			}

			// Disable Simplygon support if compiling against the NULL RHI.
			if (Target.GlobalDefinitions.Contains("USE_NULL_RHI=1"))
			{
				Target.bCompileCEF3 = false;
			}
			
			// If clang is selected for static analysis, switch compiler to clang and proceed
			// as normal.
			if (Target.StaticAnalyzer == StaticAnalyzer.Clang)
			{
				if (!Target.WindowsPlatform.Compiler.IsClang())
				{
					Target.WindowsPlatform.Compiler = WindowsCompiler.Clang;
				}
				Target.StaticAnalyzer = StaticAnalyzer.Default;
			}
			else if (Target.StaticAnalyzer != StaticAnalyzer.None && 
			         Target.StaticAnalyzerOutputType != StaticAnalyzerOutputType.Text)
			{
				Logger.LogInformation("Defaulting static analyzer output type to text");
			}

			// Set the compiler version if necessary
			if (Target.WindowsPlatform.Compiler == WindowsCompiler.Default)
			{
				Target.WindowsPlatform.Compiler = GetDefaultCompiler(Target.ProjectFile, Target.WindowsPlatform.Architecture, Logger);
			}

			// Disable linking and ignore build outputs if we're using a static analyzer
			if (Target.StaticAnalyzer != StaticAnalyzer.None)
			{
				Target.bDisableLinking = true;
				Target.bIgnoreBuildOutputs = true;
			}

			// Disable PCHs for PVS studio analyzer.
			if (Target.StaticAnalyzer == StaticAnalyzer.PVSStudio)
			{
				Target.bUsePCHFiles = false;
			}

			// E&C support.
			if (Target.bSupportEditAndContinue || Target.bAdaptiveUnityEnablesEditAndContinue)
			{
				Target.bUseIncrementalLinking = true;
			}
			if (Target.bAdaptiveUnityEnablesEditAndContinue && !Target.bAdaptiveUnityDisablesPCH && !Target.bAdaptiveUnityCreatesDedicatedPCH)
			{
				throw new BuildException("bAdaptiveUnityEnablesEditAndContinue requires bAdaptiveUnityDisablesPCH or bAdaptiveUnityCreatesDedicatedPCH");
			}

			// If we're using PDB files and PCHs, the generated code needs to be compiled with the same options as the PCH.
			if ((Target.bUsePDBFiles || Target.bSupportEditAndContinue) && Target.bUsePCHFiles)
			{
				Target.bDisableDebugInfoForGeneratedCode = false;
			}

			Target.bCompileISPC = true;

			// Initialize the VC environment for the target, and set all the version numbers to the concrete values we chose
			Target.WindowsPlatform.Environment = CreateVCEnvironment(Target);

			// pull some things from it
			Target.WindowsPlatform.Compiler = Target.WindowsPlatform.Environment.Compiler;
			Target.WindowsPlatform.CompilerVersion = Target.WindowsPlatform.Environment.CompilerVersion.ToString();
			Target.WindowsPlatform.WindowsSdkVersion = Target.WindowsPlatform.Environment.WindowsSdkVersion.ToString();

			// If we're enabling support for C++ modules, make sure the compiler supports it. VS 16.8 changed which command line arguments are used to enable modules support.
			if (Target.bEnableCppModules && !ProjectFileGenerator.bGenerateProjectFiles && Target.WindowsPlatform.Environment.CompilerVersion < new VersionNumber(14, 28, 29304))
			{
				throw new BuildException("Support for C++20 modules requires Visual Studio 2019 16.8 preview 3 or later. Compiler Version Targeted: {0}", Target.WindowsPlatform.Environment.CompilerVersion);
			}

			// Ensure we're using recent enough version of Visual Studio to support ASan builds.
			if (Target.WindowsPlatform.bEnableAddressSanitizer && Target.WindowsPlatform.Environment.CompilerVersion < new VersionNumber(14, 27, 0))
			{
				throw new BuildException("Address sanitizer requires Visual Studio 2019 16.7 or later.");
			}

//			@Todo: Still getting reports of frequent OOM issues with this enabled as of 15.7.
//			// Enable fast PDB linking if we're on VS2017 15.7 or later. Previous versions have OOM issues with large projects.
//			if(!Target.bFormalBuild && !Target.bUseFastPDBLinking.HasValue && Target.WindowsPlatform.Compiler.IsMSVC())
//			{
//				VersionNumber Version;
//				DirectoryReference ToolChainDir;
//				if(TryGetVCToolChainDir(Target.WindowsPlatform.Compiler, Target.WindowsPlatform.CompilerVersion, out Version, out ToolChainDir) && Version >= new VersionNumber(14, 14, 26316))
//				{
//					Target.bUseFastPDBLinking = true;
//				}
//			}
		}

		/// <summary>
		/// Gets the default compiler which should be used, if it's not set explicitly by the target, command line, or config file.
		/// </summary>
		/// <returns>The default compiler version</returns>
		internal static WindowsCompiler GetDefaultCompiler(FileReference? ProjectFile, WindowsArchitecture Architecture, ILogger Logger)
		{
			// If there's no specific compiler set, try to pick the matching compiler for the selected IDE
			if (ProjectFileGeneratorSettings.Format != null)
			{
				foreach(ProjectFileFormat Format in ProjectFileGeneratorSettings.ParseFormatList(ProjectFileGeneratorSettings.Format, Logger))
				{
					if (Format == ProjectFileFormat.VisualStudio2022)
					{
						return WindowsCompiler.VisualStudio2022;
					}
					else if (Format == ProjectFileFormat.VisualStudio2019)
					{
						return WindowsCompiler.VisualStudio2019;
					}
				} 
			}

			// Also check the default format for the Visual Studio project generator
			object? ProjectFormatObject;
			if (XmlConfig.TryGetValue(typeof(VCProjectFileSettings), "ProjectFileFormat", out ProjectFormatObject))
			{
				VCProjectFileFormat ProjectFormat = (VCProjectFileFormat)ProjectFormatObject;
				if (ProjectFormat == VCProjectFileFormat.VisualStudio2022)
				{
					return WindowsCompiler.VisualStudio2022;
				}
				else if (ProjectFormat == VCProjectFileFormat.VisualStudio2019)
				{
					return WindowsCompiler.VisualStudio2019;
				}
			}

			// Check the editor settings too
			ProjectFileFormat PreferredAccessor;
			if(ProjectFileGenerator.GetPreferredSourceCodeAccessor(ProjectFile, out PreferredAccessor))
			{
				if(PreferredAccessor == ProjectFileFormat.VisualStudio2022)
			    {
				    return WindowsCompiler.VisualStudio2022;
			    }
				else if (PreferredAccessor == ProjectFileFormat.VisualStudio2019)
				{
					return WindowsCompiler.VisualStudio2019;
				}
			}

			// Second, default based on what's installed, test for 2022 first
			if (MicrosoftPlatformSDK.HasValidCompiler(WindowsCompiler.VisualStudio2022, Architecture, Logger))
			{
				return WindowsCompiler.VisualStudio2022;
			}
			else if (MicrosoftPlatformSDK.HasValidCompiler(WindowsCompiler.VisualStudio2019, Architecture, Logger))
			{
				return WindowsCompiler.VisualStudio2019;
			}

			// If we do have a Visual Studio installation, but we're missing just the C++ parts, warn about that.
			if (TryGetVSInstallDirs(WindowsCompiler.VisualStudio2022, Logger) != null)
			{
				string ToolSetWarning = Architecture == WindowsArchitecture.x64 ?
					"MSVC v143 - VS 2022 C++ x64/x86 build tools (Latest)" :
					"MSVC v143 - VS 2022 C++ ARM64 build tools (Latest)";
				Logger.LogWarning("Visual Studio 2022 is installed, but is missing the C++ toolchain. Please verify that the \"{Component}\" component is selected in the Visual Studio 2022 installation options.", ToolSetWarning);
			}
			else if (TryGetVSInstallDirs(WindowsCompiler.VisualStudio2019, Logger) != null)
			{
				string ToolSetWarning = Architecture == WindowsArchitecture.x64 ?
					"MSVC v142 - VS 2019 C++ x64/x86 build tools (Latest)" :
					"MSVC v142 - VS 2019 C++ ARM64 build tools (Latest)";
				Logger.LogWarning("Visual Studio 2019 is installed, but is missing the C++ toolchain. Please verify that the \"{Component}\" component is selected in the Visual Studio 2019 installation options.", ToolSetWarning);
			}
			else
			{
				Logger.LogWarning("No Visual C++ installation was found. Please download and install Visual Studio 2022 or 2019 with C++ components.");
			}

			// Finally, default to VS2022 anyway
			return WindowsCompiler.VisualStudio2022;
		}

		/// <summary>
		/// Returns the human-readable name of the given compiler
		/// </summary>
		/// <param name="Compiler">The compiler value</param>
		/// <returns>Name of the compiler</returns>
		public static string GetCompilerName(WindowsCompiler Compiler)
		{
			return MicrosoftPlatformSDK.GetCompilerName(Compiler);
		}

		/// <summary>
		/// Get the first Visual Studio install directory for the given compiler version. Note that it is possible for the compiler toolchain to be installed without
		/// Visual Studio.
		/// </summary>
		/// <param name="Compiler">Version of the toolchain to look for.</param>
		/// <param name="Logger">Logger for output</param>
		/// <returns>True if the directory was found, false otherwise.</returns>
		public static IEnumerable<DirectoryReference>? TryGetVSInstallDirs(WindowsCompiler Compiler, ILogger Logger)
		{
			List<VisualStudioInstallation> Installations = MicrosoftPlatformSDK.FindVisualStudioInstallations(Compiler, Logger);
			if(Installations.Count == 0)
			{
				return null;
			}

			return Installations.Select(x => x.BaseDir);
		}

		/// <summary>
		/// Determines if a given compiler is installed
		/// </summary>
		/// <param name="Compiler">Compiler to check for</param>
		/// <param name="Architecture">Architecture the compiler must support</param>
		/// <param name="Logger">Logger for output</param>
		/// <returns>True if the given compiler is installed</returns>
		public static bool HasCompiler(WindowsCompiler Compiler, WindowsArchitecture Architecture, ILogger Logger)
		{
			return MicrosoftPlatformSDK.HasCompiler(Compiler, Architecture, Logger);
		}

		/// <summary>
		/// Determines the directory containing the MSVC toolchain
		/// </summary>
		/// <param name="Compiler">Major version of the compiler to use</param>
		/// <param name="CompilerVersion">The minimum compiler version to use</param>
		/// <param name="Architecture">Architecture that is required</param>
		/// <param name="Logger">Logger for output</param>
		/// <param name="OutToolChainVersion">Receives the chosen toolchain version</param>
		/// <param name="OutToolChainDir">Receives the directory containing the toolchain</param>
		/// <param name="OutRedistDir">Receives the optional directory containing redistributable components</param>
		/// <returns>True if the toolchain directory was found correctly</returns>
		public static bool TryGetToolChainDir(WindowsCompiler Compiler, string? CompilerVersion, WindowsArchitecture Architecture, ILogger Logger, [NotNullWhen(true)] out VersionNumber? OutToolChainVersion, [NotNullWhen(true)] out DirectoryReference? OutToolChainDir, out DirectoryReference? OutRedistDir)
		{
			return MicrosoftPlatformSDK.TryGetToolChainDir(Compiler, CompilerVersion, Architecture, Logger, out OutToolChainVersion, out OutToolChainDir, out OutRedistDir);
		}

		public static string GetArchitectureSubpath(WindowsArchitecture arch)
		{
			string archPath = "Unknown";
			if (arch == WindowsArchitecture.x64)
			{
				archPath = "x64";
			}
			else if (arch == WindowsArchitecture.ARM64)
			{
				archPath = "arm64";
			}
			return archPath;
		}


		/// <summary>
		/// Determines if a directory contains a valid DIA SDK
		/// </summary>
		/// <param name="DiaSdkDir">The directory to check</param>
		/// <returns>True if it contains a valid DIA SDK</returns>
		static bool IsValidDiaSdkDir(DirectoryReference DiaSdkDir)
		{
			return FileReference.Exists(FileReference.Combine(DiaSdkDir, "bin", "amd64", "msdia140.dll"));
		}



		[SupportedOSPlatform("windows")]
		public static bool TryGetWindowsSdkDir(string? DesiredVersion, ILogger Logger, [NotNullWhen(true)] out VersionNumber? OutSdkVersion, [NotNullWhen(true)] out DirectoryReference? OutSdkDir)
		{
			return MicrosoftPlatformSDK.TryGetWindowsSdkDir(DesiredVersion, Logger, out OutSdkVersion, out OutSdkDir);
		}


		/// <summary>
		/// Gets the platform name that should be used.
		/// </summary>
		public override string GetPlatformName()
		{
			return "Windows";
		}

		/// <summary>
		/// If this platform can be compiled with SN-DBS
		/// </summary>
		public override bool CanUseSNDBS()
		{
			return true;
		}

		/// <summary>
		/// If this platform can be compiled with FASTBuild
		/// </summary>
		public override bool CanUseFASTBuild()
		{
			return true;
		}

		/// <summary>
		/// Determines if the given name is a build product for a target.
		/// </summary>
		/// <param name="FileName">The name to check</param>
		/// <param name="NamePrefixes">Target or application names that may appear at the start of the build product name (eg. "UnrealEditor", "ShooterGameEditor")</param>
		/// <param name="NameSuffixes">Suffixes which may appear at the end of the build product name</param>
		/// <returns>True if the string matches the name of a build product, false otherwise</returns>
		public override bool IsBuildProduct(string FileName, string[] NamePrefixes, string[] NameSuffixes)
		{
			return IsBuildProductName(FileName, NamePrefixes, NameSuffixes, ".exe")
				|| IsBuildProductName(FileName, NamePrefixes, NameSuffixes, ".dll")
				|| IsBuildProductName(FileName, NamePrefixes, NameSuffixes, ".dll.response")
				|| IsBuildProductName(FileName, NamePrefixes, NameSuffixes, ".lib")
				|| IsBuildProductName(FileName, NamePrefixes, NameSuffixes, ".pdb")
				|| IsBuildProductName(FileName, NamePrefixes, NameSuffixes, ".exp")
				|| IsBuildProductName(FileName, NamePrefixes, NameSuffixes, ".obj")
				|| IsBuildProductName(FileName, NamePrefixes, NameSuffixes, ".map")
				|| IsBuildProductName(FileName, NamePrefixes, NameSuffixes, ".objpaths");
		}

		/// <summary>
		/// Get the extension to use for the given binary type
		/// </summary>
		/// <param name="InBinaryType"> The binrary type being built</param>
		/// <returns>string    The binary extenstion (ie 'exe' or 'dll')</returns>
		public override string GetBinaryExtension(UEBuildBinaryType InBinaryType)
		{
			switch (InBinaryType)
			{
				case UEBuildBinaryType.DynamicLinkLibrary:
					return ".dll";
				case UEBuildBinaryType.Executable:
					return ".exe";
				case UEBuildBinaryType.StaticLibrary:
					return ".lib";
			}
			return base.GetBinaryExtension(InBinaryType);
		}

		/// <summary>
		/// Get the extensions to use for debug info for the given binary type
		/// </summary>
		/// <param name="Target">The target being built</param>
		/// <param name="InBinaryType"> The binary type being built</param>
		/// <returns>string[]    The debug info extensions (i.e. 'pdb')</returns>
		public override string[] GetDebugInfoExtensions(ReadOnlyTargetRules Target, UEBuildBinaryType InBinaryType)
		{
			switch (InBinaryType)
			{
				case UEBuildBinaryType.DynamicLinkLibrary:
				case UEBuildBinaryType.Executable:
					return new string[] {".pdb"};
			}
			return new string [] {};
		}

		public override bool HasDefaultBuildConfig(UnrealTargetPlatform Platform, DirectoryReference ProjectPath)
		{
			// check the base settings
			return base.HasDefaultBuildConfig(Platform, ProjectPath);
		}

		/// <summary>
		/// Modify the rules for a newly created module, where the target is a different host platform.
		/// This is not required - but allows for hiding details of a particular platform.
		/// </summary>
		/// <param name="ModuleName">The name of the module</param>
		/// <param name="Rules">The module rules</param>
		/// <param name="Target">The target being build</param>
		public override void ModifyModuleRulesForOtherPlatform(string ModuleName, ModuleRules Rules, ReadOnlyTargetRules Target)
		{
		}

		/// <summary>
		/// Gets the application icon for a given project
		/// </summary>
		/// <param name="ProjectFile">The project file</param>
		/// <returns>The icon to use for this project</returns>
		public static FileReference GetWindowsApplicationIcon(FileReference? ProjectFile)
		{
			// Check if there's a custom icon
			if(ProjectFile != null)
			{
				FileReference IconFile = FileReference.Combine(ProjectFile.Directory, "Build", "Windows", "Application.ico");
				if(FileReference.Exists(IconFile))
				{
					return IconFile;
				}
			}

			// Otherwise use the default
			return FileReference.Combine(Unreal.EngineDirectory, "Build", "Windows", "Resources", "Default.ico");
		}

		/// <summary>
		/// Gets the application icon for a given project
		/// </summary>
		/// <param name="ProjectFile">The project file</param>
		/// <returns>The icon to use for this project</returns>
		public virtual FileReference GetApplicationIcon(FileReference ProjectFile)
		{
			return GetWindowsApplicationIcon(ProjectFile);
		}


		/// <summary>
		/// Modify the rules for a newly created module, in a target that's being built for this platform.
		/// This is not required - but allows for hiding details of a particular platform.
		/// </summary>
		/// <param name="ModuleName">The name of the module</param>
		/// <param name="Rules">The module rules</param>
		/// <param name="Target">The target being build</param>
		public override void ModifyModuleRulesForActivePlatform(string ModuleName, ModuleRules Rules, ReadOnlyTargetRules Target)
		{
			bool bBuildShaderFormats = Target.bForceBuildShaderFormats;

			if (!Target.bBuildRequiresCookedData)
			{
				if (ModuleName == "TargetPlatform")
				{
					bBuildShaderFormats = true;
				}
			}

			// allow standalone tools to use target platform modules, without needing Engine
			if (ModuleName == "TargetPlatform")
			{
				if (Target.bForceBuildTargetPlatforms)
				{
					Rules.DynamicallyLoadedModuleNames.Add("WindowsTargetPlatform");
				}

				if (bBuildShaderFormats)
				{
					Rules.DynamicallyLoadedModuleNames.Add("ShaderFormatD3D");
					Rules.DynamicallyLoadedModuleNames.Add("ShaderFormatOpenGL");
					Rules.DynamicallyLoadedModuleNames.Add("ShaderFormatVectorVM");

					Rules.DynamicallyLoadedModuleNames.Remove("VulkanRHI");
					Rules.DynamicallyLoadedModuleNames.Add("VulkanShaderFormat");
				}
			}

			// Delay-load D3D12 so we can use the latest features and still run on downlevel versions of the OS
			Rules.PublicDelayLoadDLLs.Add("d3d12.dll");
		}

		/// <summary>
		/// Setup the target environment for building
		/// </summary>
		/// <param name="Target">Settings for the target being compiled</param>
		/// <param name="CompileEnvironment">The compile environment for this target</param>
		/// <param name="LinkEnvironment">The link environment for this target</param>
		public override void SetUpEnvironment(ReadOnlyTargetRules Target, CppCompileEnvironment CompileEnvironment, LinkEnvironment LinkEnvironment)
		{
			// @todo Remove this hack to work around broken includes
			CompileEnvironment.Definitions.Add("NDIS_MINIPORT_MAJOR_VERSION=0");

			CompileEnvironment.Definitions.Add("WIN32=1");

			CompileEnvironment.Definitions.Add(String.Format("_WIN32_WINNT=0x{0:X4}", Target.WindowsPlatform.TargetWindowsVersion));
			CompileEnvironment.Definitions.Add(String.Format("WINVER=0x{0:X4}", Target.WindowsPlatform.TargetWindowsVersion));
			
			CompileEnvironment.Definitions.Add("PLATFORM_WINDOWS=1");
			CompileEnvironment.Definitions.Add("PLATFORM_MICROSOFT=1");

			// both Win32 and Win64 use Windows headers, so we enforce that here
			CompileEnvironment.Definitions.Add(String.Format("OVERRIDE_PLATFORM_HEADER_NAME={0}", GetPlatformName()));

			// Ray tracing only supported on 64-bit Windows.
			if (Target.Platform == UnrealTargetPlatform.Win64 && Target.WindowsPlatform.bEnableRayTracing)
			{
				CompileEnvironment.Definitions.Add("RHI_RAYTRACING=1");
			}

			// Explicitly exclude the MS C++ runtime libraries we're not using, to ensure other libraries we link with use the same
			// runtime library as the engine.
			bool bUseDebugCRT = Target.Configuration == UnrealTargetConfiguration.Debug && Target.bDebugBuildsActuallyUseDebugCRT;
			if (!Target.bUseStaticCRT || bUseDebugCRT)
			{
				LinkEnvironment.ExcludedLibraries.Add("LIBCMT");
				LinkEnvironment.ExcludedLibraries.Add("LIBCPMT");
			}
			if (!Target.bUseStaticCRT || !bUseDebugCRT)
			{
				LinkEnvironment.ExcludedLibraries.Add("LIBCMTD");
				LinkEnvironment.ExcludedLibraries.Add("LIBCPMTD");
			}
			if (Target.bUseStaticCRT || bUseDebugCRT)
			{
				LinkEnvironment.ExcludedLibraries.Add("MSVCRT");
				LinkEnvironment.ExcludedLibraries.Add("MSVCPRT");
			}
			if (Target.bUseStaticCRT || !bUseDebugCRT)
			{
				LinkEnvironment.ExcludedLibraries.Add("MSVCRTD");
				LinkEnvironment.ExcludedLibraries.Add("MSVCPRTD");
			}
			LinkEnvironment.ExcludedLibraries.Add("LIBC");
			LinkEnvironment.ExcludedLibraries.Add("LIBCP");
			LinkEnvironment.ExcludedLibraries.Add("LIBCD");
			LinkEnvironment.ExcludedLibraries.Add("LIBCPD");

			//@todo ATL: Currently, only VSAccessor requires ATL (which is only used in editor builds)
			// When compiling games, we do not want to include ATL - and we can't when compiling games
			// made with Launcher build due to VS 2012 Express not including ATL.
			// If more modules end up requiring ATL, this should be refactored into a BuildTarget flag (bNeedsATL)
			// that is set by the modules the target includes to allow for easier tracking.
			// Alternatively, if VSAccessor is modified to not require ATL than we should always exclude the libraries.
			if (Target.LinkType == TargetLinkType.Monolithic &&
				(Target.Type == TargetType.Game || Target.Type == TargetType.Client || Target.Type == TargetType.Server))
			{
				LinkEnvironment.ExcludedLibraries.Add("atl");
				LinkEnvironment.ExcludedLibraries.Add("atls");
				LinkEnvironment.ExcludedLibraries.Add("atlsd");
				LinkEnvironment.ExcludedLibraries.Add("atlsn");
				LinkEnvironment.ExcludedLibraries.Add("atlsnd");
			}

			// Add the library used for the delayed loading of DLLs.
			LinkEnvironment.SystemLibraries.Add("delayimp.lib");

			//@todo - remove once FB implementation uses Http module
			if (Target.bCompileAgainstEngine)
			{
				// link against wininet (used by FBX and Facebook)
				LinkEnvironment.SystemLibraries.Add("wininet.lib");
			}

			// Compile and link with Win32 API libraries.
			LinkEnvironment.SystemLibraries.Add("rpcrt4.lib");
			//LinkEnvironment.AdditionalLibraries.Add("wsock32.lib");
			LinkEnvironment.SystemLibraries.Add("ws2_32.lib");
			LinkEnvironment.SystemLibraries.Add("dbghelp.lib");
			LinkEnvironment.SystemLibraries.Add("comctl32.lib");
			LinkEnvironment.SystemLibraries.Add("Winmm.lib");
			LinkEnvironment.SystemLibraries.Add("kernel32.lib");
			LinkEnvironment.SystemLibraries.Add("user32.lib");
			LinkEnvironment.SystemLibraries.Add("gdi32.lib");
			LinkEnvironment.SystemLibraries.Add("winspool.lib");
			LinkEnvironment.SystemLibraries.Add("comdlg32.lib");
			LinkEnvironment.SystemLibraries.Add("advapi32.lib");
			LinkEnvironment.SystemLibraries.Add("shell32.lib");
			LinkEnvironment.SystemLibraries.Add("ole32.lib");
			LinkEnvironment.SystemLibraries.Add("oleaut32.lib");
			LinkEnvironment.SystemLibraries.Add("uuid.lib");
			LinkEnvironment.SystemLibraries.Add("odbc32.lib");
			LinkEnvironment.SystemLibraries.Add("odbccp32.lib");
			LinkEnvironment.SystemLibraries.Add("netapi32.lib");
			LinkEnvironment.SystemLibraries.Add("iphlpapi.lib");
			LinkEnvironment.SystemLibraries.Add("setupapi.lib"); //  Required for access monitor device enumeration

			// Windows 7 Desktop Windows Manager API for Slate Windows Compliance
			LinkEnvironment.SystemLibraries.Add("dwmapi.lib");

			// IME
			LinkEnvironment.SystemLibraries.Add("imm32.lib");

			// For 64-bit builds, we'll forcibly ignore a linker warning with DirectInput.  This is
			// Microsoft's recommended solution as they don't have a fixed .lib for us.
			LinkEnvironment.AdditionalArguments += " /ignore:4078";

			// Set up default stack size
			LinkEnvironment.DefaultStackSize = Target.WindowsPlatform.DefaultStackSize;
			LinkEnvironment.DefaultStackSizeCommit = Target.WindowsPlatform.DefaultStackSizeCommit;

			LinkEnvironment.ModuleDefinitionFile = Target.WindowsPlatform.ModuleDefinitionFile;

			if ((Target.bPGOOptimize || Target.bPGOProfile) && Target.ProjectFile != null)
			{
				// LTCG is required for PGO
				//CompileEnvironment.bAllowLTCG = true;
				//LinkEnvironment.bAllowLTCG = true;

				CompileEnvironment.PGODirectory = Path.Combine(DirectoryReference.FromFile(Target.ProjectFile).FullName, "Platforms", "Windows", "Build", "PGO");
				CompileEnvironment.PGOFilenamePrefix = string.Format("{0}-{1}-{2}", Target.Name, Target.Platform, Target.Configuration);

				LinkEnvironment.PGODirectory = CompileEnvironment.PGODirectory;
				LinkEnvironment.PGOFilenamePrefix = CompileEnvironment.PGOFilenamePrefix;
			}
		}

		/// <summary>
		/// Setup the configuration environment for building
		/// </summary>
		/// <param name="Target"> The target being built</param>
		/// <param name="GlobalCompileEnvironment">The global compile environment</param>
		/// <param name="GlobalLinkEnvironment">The global link environment</param>
		public override void SetUpConfigurationEnvironment(ReadOnlyTargetRules Target, CppCompileEnvironment GlobalCompileEnvironment, LinkEnvironment GlobalLinkEnvironment)
		{
			base.SetUpConfigurationEnvironment(Target, GlobalCompileEnvironment, GlobalLinkEnvironment);

			// NOTE: Even when debug info is turned off, we currently force the linker to generate debug info
			//       anyway on Visual C++ platforms.  This will cause a PDB file to be generated with symbols
			//       for most of the classes and function/method names, so that crashes still yield somewhat
			//       useful call stacks, even though compiler-generate debug info may be disabled.  This gives
			//       us much of the build-time savings of fully-disabled debug info, without giving up call
			//       data completely.
			GlobalLinkEnvironment.bCreateDebugInfo = true;
		}

		/// <summary>
		/// Whether this platform should create debug information or not
		/// </summary>
		/// <param name="Target">The target being built</param>
		/// <returns>bool    true if debug info should be generated, false if not</returns>
		public override bool ShouldCreateDebugInfo(ReadOnlyTargetRules Target)
		{
			switch (Target.Configuration)
			{
				case UnrealTargetConfiguration.Development:
				case UnrealTargetConfiguration.Shipping:
				case UnrealTargetConfiguration.Test:
					return !Target.bOmitPCDebugInfoInDevelopment;
				case UnrealTargetConfiguration.DebugGame:
				case UnrealTargetConfiguration.Debug:
				default:
					return true;
			};
		}

		/// <summary>
		/// Creates a toolchain instance for the given platform.
		/// </summary>
		/// <param name="Target">The target being built</param>
		/// <returns>New toolchain instance.</returns>
		public override UEToolChain CreateToolChain(ReadOnlyTargetRules Target)
		{
			if (Target.StaticAnalyzer == StaticAnalyzer.PVSStudio)
			{
				return new PVSToolChain(Target, Logger);
			}
			else
			{
				return new VCToolChain(Target, Logger);
			}
		}

		/// <summary>
		/// Allows the platform to return various build metadata that is not tracked by other means. If the returned string changes, the makefile will be invalidated.
		/// </summary>
		/// <param name="ProjectFile">The project file being built</param>
		/// <param name="Metadata">String builder to contain build metadata</param>
		public override void GetExternalBuildMetadata(FileReference? ProjectFile, StringBuilder Metadata)
		{
			base.GetExternalBuildMetadata(ProjectFile, Metadata);

			if(ProjectFile != null)
			{
				Metadata.AppendLine("ICON: {0}", GetApplicationIcon(ProjectFile));
			}
		}

		/// <summary>
		/// Deploys the given target
		/// </summary>
		/// <param name="Receipt">Receipt for the target being deployed</param>
		public override void Deploy(TargetReceipt Receipt)
		{
			new UEDeployWindows(Logger).PrepTargetForDeployment(Receipt);
		}
	}

	class UEDeployWindows : UEBuildDeploy
	{
		public UEDeployWindows(ILogger InLogger)
			: base(InLogger)
		{
		}

		public override bool PrepTargetForDeployment(TargetReceipt Receipt)
		{
			return base.PrepTargetForDeployment(Receipt);
		}
	}

	class WindowsPlatformFactory : UEBuildPlatformFactory
	{
		public override UnrealTargetPlatform TargetPlatform
		{
			get { return UnrealTargetPlatform.Win64; }
		}

		/// <summary>
		/// Register the platform with the UEBuildPlatform class
		/// </summary>
		public override void RegisterBuildPlatforms(ILogger Logger)
		{
			MicrosoftPlatformSDK SDK = new MicrosoftPlatformSDK(Logger);

			// Register this build platform for Win64 (no more Win32)
			UEBuildPlatform.RegisterBuildPlatform(new WindowsPlatform(UnrealTargetPlatform.Win64, SDK, Logger), Logger);
			UEBuildPlatform.RegisterPlatformWithGroup(UnrealTargetPlatform.Win64, UnrealPlatformGroup.Windows);
			UEBuildPlatform.RegisterPlatformWithGroup(UnrealTargetPlatform.Win64, UnrealPlatformGroup.Microsoft);
			UEBuildPlatform.RegisterPlatformWithGroup(UnrealTargetPlatform.Win64, UnrealPlatformGroup.Desktop);
		}
	}
}