---
title: UnrealBuildTool (UBT) & Targets
source: https://dev.epicgames.com/documentation/en-us/unreal-engine/unreal-build-tool-in-unreal-engine
version: Unreal Engine 5.8 Documentation
fetched: 2026-10-11
note: 原文摘录（英文），供 wiki 引用；非全文
---

# UnrealBuildTool (UBT) & Targets

(另含 https://dev.epicgames.com/documentation/en-us/unreal-engine/unreal-engine-build-tool-target-reference)
- UBT manages the process of building UE source code across a variety of build configurations. Read `BuildConfiguration.cs` for options.
- UE is split into many modules. Each module has a `.build.cs` file ... dependencies, additional libraries, include paths. By default, these modules are compiled into DLLs and loaded by a single executable. You can choose to build a monolithic executable.
- The build process executes independently of any project files (.sln, .vcproj); a tool generates them (GenerateProjectFiles).
- Target types: Game (standalone, requires cooked data), Client (no server code), Server (no client code), Editor, Program.
- Targets declared in `.target.cs` files under the project root, class deriving from `TargetRules`; class name = file name + 'Target'. UBT compiles the target file and constructs the class to determine settings.
- Selected properties: Type; LinkType (monolithic or modular); bUseUnityBuild ("unify C++ code into larger files for faster compilation"); bUseAdaptiveUnityBuild (exclude files being iterated on from unity blobs, using read-only flag for Perforce or git status for Git); bWithLiveCoding; bAllowHotReload; ExtraModuleNames; EnablePlugins/DisablePlugins; DefaultBuildSettings; bWithServerCode/bWithClientCode; NativePointerMemberBehaviorOverride (whether UCLASSes and USTRUCTs may have native pointer members; if disallowed, UHT error, substitute TObjectPtr); bRequireObjectPtrForAddReferencedObjects ("Needed for compatibility with incremental GC").