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After build cannot start UE4 Editor

I just compiled UE4 from github and when I want to start UE4 Editor I get:

 tomsk@Andromeda:~/UnrealEngine$ ./Engine/Binaries/Linux/UE4Editor
 ./Engine/Binaries/Linux/UE4Editor: symbol lookup error: /home/tomsk/UnrealEngine/Engine/Binaries/Linux/libUE4Editor-Kismet.so: undefined symbol: _ZN26FGraphEditorDragDropAction9ConstructEv

Any solution please?

Followed by this tutorial: https://wiki.unrealengine.com/Building_On_Linux

Linux: Debian 9

Product Version: UE 4.15
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asked Apr 11 '17 at 12:11 PM in Installation & Setup

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Hey t0msk-

The message you're seeing is likely related to the version of clang you're using. Can you try switching clang to 3.8 and then run through ./Setup.sh & ./GenerateProjectFiles.sh. You may also want to download a fresh instance of the engine and do a clean rebuild as well.


Doug Wilson

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answered Apr 11 '17 at 05:55 PM

avatar image t0msk Apr 11 '17 at 06:59 PM

Thank you and please how can I switch to Clang 3.8? Because Setup will install Clang 3.9 automatically.

avatar image Doug E ♦♦ STAFF Apr 11 '17 at 07:34 PM

You should be able to use the command "sudo apt-get install clang-3.8" in your terminal output to install 3.8 specifically. You may want to check the following page for how to set it as default: http://askubuntu.com/questions/791616/set-clang-3-8-as-default

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