Fresh C++ project fails to compile UE4.18.3 on Mac OS

Development Programming & Scripting C++
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1

Can’t get past this error. I’ve tried compiling the project in Xcode as well with same results.

Running Mono…

Setting up Mono
/Users/Shared/Epic Games/UE_4.18/Engine /Users/Shared/Epic Games/UE_4.18/Engine/Binaries/Mac
@progress push 5%
Parsing headers for Unreal4AR_TestEditor
Running UnrealHeaderTool “/PROJECTS/UE4/Unreal4AR_Test/Unreal4AR_Test.uproject” “/PROJECTS/UE4/Unreal4AR_Test/Intermediate/Build/Mac/Unreal4AR_TestEditor/Development/Unreal4AR_TestEditor.uhtmanifest” -LogCmds=“loginit warning, logexit warning, logdatabase error” -Unattended -WarningsAsErrors -installed
Reflection code generated for Unreal4AR_TestEditor in 9.5792895 seconds
@progress pop
Performing 6 actions (4 in parallel)
[1/6] Compile SharedPCH.Engine.h
In file included from /Users/Shared/Epic Games/UE_4.18/Engine/Intermediate/Build/Mac/UE4Editor/Development/Engine/SharedPCH.Engine.h:138:
In file included from /Users/Shared/Epic Games/UE_4.18/Engine/Source/Runtime/Engine/Public/EngineSharedPCH.h:300:
Runtime/CoreUObject/Public/UObject/UnrealType.h:3285:37: error: lambda capture ‘LocalMapLayoutForCapture’ is not used [-Werror,-Wunused-lambda-capture]
[LocalKeyPropForCapture, KeyPtr, LocalMapLayoutForCapture](void* NewElementKey)
^
Runtime/CoreUObject/Public/UObject/UnrealType.h:3298:41: error: lambda capture ‘LocalMapLayoutForCapture’ is not used [-Werror,-Wunused-lambda-capture]
[LocalValuePropForCapture, ValuePtr, LocalMapLayoutForCapture](void* NewElementValue)
^
Runtime/CoreUObject/Public/UObject/UnrealType.h:3808:47: error: lambda capture ‘LocalSetLayoutForCapture’ is not used [-Werror,-Wunused-lambda-capture]
[LocalElementPropForCapture, ElementToAdd, LocalSetLayoutForCapture](void* NewElement)
^
3 errors generated.
ERROR: UBT ERROR: Failed to produce item: /PROJECTS/UE4/Unreal4AR_Test/Binaries/Mac/UE4Editor-Unreal4AR_Test.dylib
Total build time: 36.09 seconds (Local executor: 0.00 seconds)

2

Getting the same issue here as well

3

Managed to figure out my issue. Seemed that Xcode 9.3 didn’t work. Tried 8.3 and it ran fine.

4

Thanks for the info. I need Xcode 9.3 for Arcore to compile. Thankfully UE4.19 was just officially released with the unified API, so maybe I’m dodging the bullet.

5

I also run into this errors generated from [-Werror,-Wunused-lambda-capture] setting using Xcode 9.3 and was able to work around it with downgrading to Xcode 9.0.

6

I think my answer on a similar question may help you

7

Downgrading from Xcode 9.4.1 to Xcode 9.0 fixed this issue for me.

8

Only downgrading from Xcode 9.4.1 to Xcode 9.0 fixed this issue for me. You can’t upload Xcode 8.3 builds to the AppStore anymore, because Xcode 8 targets iOS 10 and it must target iOS 11 at least. Application Loader will give you an error.