- Added IntermediateDirectoryNoArch to UEBuildModule (we can use this in the future to put generated definitions headers, which can help reduce rebuilds going between multi- and single-arch)
#rb Joe.kirchoff
#jira UE-178211,UE-178589
#preflight 63fd3cb72b1a2765f9a46322
[CL 24441385 by josh adams in ue5-main branch]
Changed how single files are built. We don't want to invalidate makefile everytime we build single files since it destroys turnaround times. With this change a single file compile can take 2s (+ the actual compile time).
The new behavior injects a special action per module when creating the makefile. These actions can be used to on-the-fly create a proper compile action that follows the rules of the module that the specific file belongs to.. In a normal build these actions are ignored since the logic deciding which actions to build is backtraced from which binaries we want to create.
When a specific file compile is triggered, the logic deciding which files to build search up all these special actions and create a lookup based on which folders the special actions handle. It then try to find the special action that handles the specific file. The matching special action then creates a compile action that can handle that specific file and then queue up the action for execution. If no special action is found it falls back to try to use actions that have this specific file as input (ispc files for example)
Details:
* Removed lots of custom code for "specific files" handling
* Changed so pch (both private and shared) always use definition file. Added #pragma once and change so pch wrapper file include definition file. This made the adaptive path and specific file easy to implement (just disable pch in compile environment and it will just work)
* Added SingleFileAction for both VCToolChain and ClangToolChain. It now works to compile specific headers and cpp files. (It creates wrapper files on the fly to be able to compile all header files (compiling headers directly blow up if there are circular includes)
* Fixed so GenerateClangDatabase mode works with new changes
* Moved the logic that makes sure all (directly) depending cpp files are recompiled when .h are included in the singlefile option
#preflight 63dcc46f78716a01e8069649
#rb joe.kirchoff
[CL 24094027 by henrik karlsson in ue5-main branch]
* Minor optimizations based on superluminal profiling information
#preflight 63d860d77a39a180218b2490
#rb joe.kirchoff
[CL 23924068 by henrik karlsson in ue5-main branch]
- Creates the UnrealArchitectures class, which wraps a list of UnrealArch objects
- UnrealArch is a single architecture, expandable enum-like struct
- There is no more concept of "no/default architecture", there is always a valid active architecture when building
- Most uses of "string Architecture" are replaced with one of the two above, depending if multiple architectures are supported or not
- UnrealArch has some platform-extensions for platform-specific naming (like Linux adds in LinuxName that turns, for instance, Arm64 -> aarch64-unknown-linux-gnueabi, which is used in folder names, etc)
- UnrealArch has bIsX64 which can be used determine intel instruction set (as opposed to arm)
- TargetRules class has an "Architecture" accessor that will return a single architecture if the active architectures is a single architecture, or throw an exception if multiple. This is useful in a majority of the cases where a paltform can only have a single architecture active in TargetRules (microsoft platforms, for instance, will create separate targets when compiling multiple architectures at once)
- Added UnrealArchitectureConfig class, which contains all the architecture information for a platform (what architectures are supported, what ones are currently active for given project, etc)
#preflight 63c81fb5b065224750a1759e
#rb mike.fricker,roman.dzieciol,joe.kirchoff,dmytro.vovk,brandon.schaefer [various parts]
#p4v-preflight-copy 23562471
[CL 23829977 by josh adams in ue5-main branch]
* Added code to fixup definitions provided through .build.cs files. There are actually strict rules around the syntax of defines (reading msvc documentation). There should be no space before or after the '=' character. so "MY_DEFINE = 1" is actually invalid. When building with header units this actually produce invalid data but in normal builds it seems to swallow it (even though the documentation says it shouldn't)
I would have wanted to fix the code producing bad definition format but it is in a whole bunch of modules so I suspect external teams might have this too, so instead we fix it up by trimming the strings before and after '='
#preflight 63b894b9221aab21e0970eb0
#rb none
[CL 23605565 by henrik karlsson in ue5-main branch]
- Mac changes to compile separately, but link together (with lipo) after making two .dylibs/executables
- Removed FixDylibDependencies on Mac by making "stub dylibs" to mimic what Windows does with import libs, to solve circular dependencies
- Added DependenciesToSkipByArchitecture to ModuleRules that is used, when making a new single-arch LinkEnvironment from a multi-arch LinkEnvironment, to strip out libraries, etc, that should not be included with that single architecture
#preflight 6387891b4004f73f623c85a0
#rb zack.neyland
[CL 23336522 by Josh Adams in ue5-main branch]
[FYI] Joe.Kirchoff
Original CL Desc
-----------------------------------------------------------------
UnrealHeaderTool: BuildSetting.V3 (currently disabled) which disallows adding module parent directory to include path list
#rnx
#rb bryan.sefcik
#preflight 634df3105f008d633fd571d2
[CL 22795918 by joe kirchoff in ue5-main branch]
- test-specific targets and modules are constructed by RulesAssembly which removes a lot of spaghetti code
- no more excluding the Tests folder by default which is guaranteed to mislead users #fyi Jon.Nabozny
- test compilation in Tests is controlled through WITH_LOW_LEVEL_TESTS
- preparation code for switching tests between Catch2 / TestAutomation Fmwk
Nightly LLT PF 6260431391376845adeb4c40
#rnx
#preflight 62602d50dd47b4ad2173c30b
[CL 19834665 by chris constantinescu in ue5-main branch]
- Each module can now have a Tests folder at its root containing low level tests written with Catch2
- Used like this: UnrealBuildTool.exe -Mode=Test TargetName Platform Configuration
- It creates a test executable that's associated with the specified build Target and it includes all the tests for the Target AND all its dependencies as well
- When building without -Mode=Test it will omit the Tests folder contents from compilation: in theory we never allowed folders named Tests at the root of modules, but there might be isolated exceptions where we didn't validate folder names - in this case we will need to move that Tests folder one level up for example
- Code paths for test and non-test builds are entirely separated
#jira UE-135280
#rb Jerome.Delattre
#preflight 61e839d5276892ce10759205
[CL 18663474 by chris constantinescu in ue5-main branch]
