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Engine in WSL environment

Has anyone run the engine in WSL environment after compiling through crosutils?

I have one issue after compiled it in any configuration

./UE4Editor-Linux-Debug: symbol lookup error: /mnt/e/Unreal Engine 4/Engine/Engine/Binaries/Linux/libUE4Editor-UnrealEd-Linux-Debug.so: undefined symbol: _Z50Z_Construct_UClass_UAnimPreviewInstance_NoRegisterv

on real linux system, after compiling through native binutils, i have no errors. But my primary develop platform are Windows and i prefer building here. And if it possible run in WSL it will be very comfortably to debug

Product Version: UE Github Master branch
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asked May 07 '19 at 06:32 PM in Installation & Setup

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TehnoMag
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Did you cross-build it using our cross-toolchain? Maybe RPATHs got embedded wrong. Would you readelf -a libUE4Editor-UnrealEd-Linux-Debug.so and attach the output here?

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answered May 07 '19 at 06:34 PM

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RCL STAFF
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avatar image TehnoMag May 07 '19 at 07:24 PM

Yes. v13_clang-7.0.1-centos7

Engine - 4.22 from 4.22 branch

Visual Studio - Community 2019 16.0.3

WSL setup with Ubuntu 18.0.4 LTS from Market

addition packages for environment - gdb and binutils

I just rebuild engine to Editor Development configuration from scratch. Error is here. readelf output in attachment.link text

readelf.zip (2.9 MB)
avatar image TehnoMag May 07 '19 at 07:45 PM

One more thing. i found _Z50Z_Construct_UClass_UAnimPreviewInstance_NoRegisterv in libUE4Editor-AnimGraph.debug, so it`s seems function must be exported from there.

And yes

nm -D libUE4Editor-AnimGraph.so | grep Construct_UClass_UAnimPreviewInstance_NoRegister

00000000002ff040 T _Z50Z_Construct_UClass_UAnimPreviewInstance_NoRegisterv

avatar image RCL STAFF May 07 '19 at 11:47 PM

There's something wrong with the libUE4Editor-UnrealEd-Linux-Debug.so binary, since the bulk of DT_NEEDED entries are missing - it does not depend on any of the other editor libraries. Probably a bug in the FixDeps step of the cross-build process, which is different from the native build. Unfortunately there's no easy solution right now, but here's the number of JIRA that is tracking the issue: UE-68926

avatar image TehnoMag May 08 '19 at 05:17 AM

What about LD_PRELOAD ? or another workaround?

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