Allows UnrealEngine to be built with FASTBuild for VS2015/VS2017 and Windows 10.
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Latest commit 61507b3 May 7, 2018
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FASTBuild.cs - Fixing the ProxyLODMeshReduction compilation issue: Added an option… May 7, 2018
LICENSE Update LICENSE Aug 15, 2016 Update May 7, 2018


Allows the usage of FASTBuild with Unreal Engine 4 with a few minor modifications. It supports Visual Studio 2015 and 2017 and the Windows 10 SDK, UE4 4.19 and FASTBuild v0.95, although you should be able to use this with previous versions of UE4 by looking at the history of the file.

To use, place the under Engine/Source/Programs/UnrealBuildTool/System/ and add to the UnrealBuildTool project or regenerate the projects. You can then call it from ExecuteActions() in ActionGraph.cs a similar manner to XGE, for 4.19 it will look something like it does in the gist here:

It requires FBuild.exe to be in your path or modifying FBuildExePathOverride to point to where your FBuild executable is.

One example of the diffs and how to use it was made available here by Fire. Likewise following the steps here but using this version of the FASTBuild.cs file should also work.

There is also a few posts here which may help people get setup with UE4, FASTBuild, as well as setting up distribution and caching.