#lockdown Nick.Penwarden
#rb none
==========================
MAJOR FEATURES + CHANGES
==========================
Change 3209340 on 2016/11/23 by Ben.Marsh
Convert UE4 codebase to an "include what you use" model - where every header just includes the dependencies it needs, rather than every source file including large monolithic headers like Engine.h and UnrealEd.h.
Measured full rebuild times around 2x faster using XGE on Windows, and improvements of 25% or more for incremental builds and full rebuilds on most other platforms.
* Every header now includes everything it needs to compile.
* There's a CoreMinimal.h header that gets you a set of ubiquitous types from Core (eg. FString, FName, TArray, FVector, etc...). Most headers now include this first.
* There's a CoreTypes.h header that sets up primitive UE4 types and build macros (int32, PLATFORM_WIN64, etc...). All headers in Core include this first, as does CoreMinimal.h.
* Every .cpp file includes its matching .h file first.
* This helps validate that each header is including everything it needs to compile.
* No engine code includes a monolithic header such as Engine.h or UnrealEd.h any more.
* You will get a warning if you try to include one of these from the engine. They still exist for compatibility with game projects and do not produce warnings when included there.
* There have only been minor changes to our internal games down to accommodate these changes. The intent is for this to be as seamless as possible.
* No engine code explicitly includes a precompiled header any more.
* We still use PCHs, but they're force-included on the compiler command line by UnrealBuildTool instead. This lets us tune what they contain without breaking any existing include dependencies.
* PCHs are generated by a tool to get a statistical amount of coverage for the source files using it, and I've seeded the new shared PCHs to contain any header included by > 15% of source files.
Tool used to generate this transform is at Engine\Source\Programs\IncludeTool.
[CL 3209342 by Ben Marsh in Main branch]
==========================
MAJOR FEATURES + CHANGES
==========================
Change 2799478 on 2015/12/11 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream1
Added Dev Stream custom versions.
- Each stream now has its own custom version
- Developers working in a stream should only modify their respective version
Change 2789867 on 2015/12/04 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream1
UnrealHeaderTool plugins no longer need to be a separate plugin and don't require UnrealHeaderTool source code changes to work.
- Merged ScriptGeneratorPlugin with ScriptPlugin
- Introduced the concept of UHT plugin support for plugins so that UHT's source files don't need to be modified to make it work with external plugins
- Added RuntimeNoProgram module type (module that can be used at runtime but not by program targets).
- Fixed logic with project file path setting in the engine. It will no longer try to crate a full path from an already rooted path.
Change 2796114 on 2015/12/09 by Steve.Robb@Dev-Core
TEnumRange - enabled ranged-based for iteration over enum values.
Change 2789843 on 2015/12/04 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream2
More thorough way of verifying GC cluster assumptions.
Change 2794221 on 2015/12/08 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream2
Don't merge GC clusters by default
Change 2797824 on 2015/12/10 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream1
Added the option to load all symbols for stack walking in non-monolithic builds.
Change 2790539 on 2015/12/04 by Jaroslaw.Surowiec@Stream.1.JarekSurowiec
Stats/Profiler - Better handling for live connection, using the same path as file profiles, added FStatsLoadedState to separate runtime stats state from the loaded one
Change 2794183 on 2015/12/08 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream1
Always reset events when returning them to pool.
Change 2794406 on 2015/12/08 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream2
Fixing -unversioned flag being completely ignored when cooking
Change 2794563 on 2015/12/08 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream2
Making sure string referenced assets don't get cooked if referenced by editor-only properties.
Change 2795124 on 2015/12/08 by Jaroslaw.Surowiec@Stream.1.JarekSurowiec
Profiler - Fixed bad data in min/max/avg inclusive times, added min/max/avg num calls, fixed event graph tooltip not displaying correct values
Change 2796208 on 2015/12/09 by Jaroslaw.Surowiec@Stream.1.JarekSurowiec
Profiler - Remove support for multiple instances in the profiler (game thread is always visible, a few crash fixes, cleaned code a bit)
Change 2797658 on 2015/12/10 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream1
Allocation verification helpers. Helps with tracking down memory stomps, freeing the same pointers multiple times.
Change 2797699 on 2015/12/10 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream1
Fix incorrect asset loading in Cooked game data (by bozaro)
PR #1844
Change 2798173 on 2015/12/10 by Steve.Robb@Dev-Core
Migration of Fortnite to use engine's TEnumRange.
Change 2798217 on 2015/12/10 by Jaroslaw.Surowiec@Stream.1.JarekSurowiec
PR #1331
[Core] Added a stomp allocator that allows finding memory overruns, underruns, and read/write after free. (Contributed by Pablo Zurita)
Change 2799605 on 2015/12/11 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream1
Fixing a crash when cancelling async loading caused by detaching linker from objects that had RF_NeedLoad flag set.
Change 2799849 on 2015/12/11 by Steve.Robb@Dev-Core
Migration of Ocean to use engine's TEnumRange.
Change 2803144 on 2015/12/15 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream1
Changed export tagging archive to also serialize class default objects using the normal Serialize path so that it can collect all custom versions used by exports.
Change 2803206 on 2015/12/15 by Jaroslaw.Surowiec@Stream.1.JarekSurowiec
#jira UE-24177
Audit ôshippingö defines in engine
Change 2804868 on 2015/12/16 by Steve.Robb@Dev-Core
Removal of stats from MallocBinned2, to be readded later.
#lockdown Nick.Penwarden
[CL 2805158 by Robert Manuszewski in Main branch]
