Public Interface of IUltraleapTrackingPlugin::SetSwizzles uses private enum ELeapQuatSwizzleAxisB defined in LeapWrapper.h

[diekleinekuh]

When trying to build LeapMotion 4.03 in a monolithic game I get a compile error:

Module.UltraleapTracking.cpp:
... Plugins\LeapUnreal\Source\UltraleapTrackingCore\Public\IUltraleapTrackingPlugin.h(76): error C2061: syntax error: identifier 'ELeapQuatSwizzleAxisB'

This might be hidden by unity builds at times.

I worked around it by forward declaring the enum. But I guess the enum should rather be moved to UltraleapTrackingData.h.

[JimSimons-UH]

Hi,

Could you provide some details about the build environment you're using?

• Which version of Visual Studio?
• Which build toolchain (it'll say something like 'Using Visual Studio 2019 14.29.30137 toolchain' in the build output)
• How are you building from visual studio, or packaging in shipping/development mode?

[diekleinekuh]

Hi:

• Visual Studio 2019 14.29.30040 toolchain
• UltraleapTracking as a project plugin
• Visual Studio 2019 IDE

You can repro this issue by disabling unity builds for the UltraLeapTracking module in BuildConfiguration.xml
<?xml version="1.0" encoding="utf-8" ?> <Configuration xmlns="https://www.unrealengine.com/BuildConfiguration"> <ModuleConfiguration> <DisableUnityBuild> <Item>UltraleapTracking</Item> </DisableUnityBuild> </ModuleConfiguration> </Configuration>

Or by adding this to UltraleapTracking.Build.cs:
bUseUnity = false;

I stumbled upon this issue because I was making changes to the UltraLeap plugin and the adaptive unity build Unreal uses pulled out a file from the unity module of the plugin revealing the problem of the missing declarations.

I just did a run with unity builds turned off and it revealed more issues:
1> [1/3] OpenXRToLeapWrapper.cpp 1>...\Plugins\LeapUnreal\Source\UltraleapTrackingCore\Private\OpenXRToLeapWrapper.cpp(58): error C2027: use of undefined type 'IXRTrackingSystem'

[JimSimons-UH]

thanks, this'll allow us to repro the issue.

[JimSimons-UH]

I've pushed another branch with fixes for those issues, these will get merged into main in a subsequent release (see the last two commits).

https://github.com/ultraleap/UnrealPlugin/tree/MonolithicBuildFix

[diekleinekuh]

Awesome. Thanks.

[JimSimons-UH]

this is now merged into main