# LibOVR compile errors when building a game from source build 4.4

**URL:** <https://forums.unrealengine.com/t/libovr-compile-errors-when-building-a-game-from-source-build-4-4/291946>\
**Category:** Programming & Scripting\
**Tags:** unreal-engine\
**Created:** [August 25, 2014, 4:13am UTC](https://forums.unrealengine.com/t/libovr-compile-errors-when-building-a-game-from-source-build-4-4/291946 "2014-08-25T04:13:21Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![TimGS](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@TimGS](https://forums.unrealengine.com/u/TimGS)\
**Post date:** [August 25, 2014, 4:13am UTC](https://forums.unrealengine.com/t/libovr-compile-errors-when-building-a-game-from-source-build-4-4/291946/1 "2014-08-25T04:13:21Z")

</div>

I can’t build Standalone Game of test Third Person project based on my source build of UE 4.4.  
Editor builds without errors but Game building attempts get linking errors:

```
1>libovr64.lib(OVR_Win32_Display.obj) : error LNK2001: unresolved external symbol "class ATL::CAtlBaseModule ATL::_AtlBaseModule" (?_AtlBaseModule@ATL@@3VCAtlBaseModule@1@A)
1>libovr64.lib(OVR_Win32_RenderShim.obj) : error LNK2001: unresolved external symbol "class ATL::CAtlBaseModule ATL::_AtlBaseModule" (?_AtlBaseModule@ATL@@3VCAtlBaseModule@1@A)
1>D:\Tim\Documents\Unreal Projects\TestThirdPerson\Binaries\Win64\TestThirdPerson.exe : fatal error LNK1120: 1 unresolved externals

```

How to resolve that?

---

<div class="post-metadata">

**Author:** ![TimGS](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@TimGS](https://forums.unrealengine.com/u/TimGS)\
**Post date:** [August 25, 2014, 5:49am UTC](https://forums.unrealengine.com/t/libovr-compile-errors-when-building-a-game-from-source-build-4-4/291946/2 "2014-08-25T05:49:13Z")

</div>

I found solution. It’s another one bug with new OculusVR lib version.  
You need to add:

```
PublicAdditionalLibraries.Add("atls.lib");

```

to your `Engine/Source/ThirdParty/Oculus/LibOVR.build.cs` file in order to build Standalone version of your project.

I’m moving it to bug reports.