# Unreal Engine Source - Cross Compile Linux libpthread.so not found

**URL:** <https://forums.unrealengine.com/t/unreal-engine-source-cross-compile-linux-libpthread-so-not-found/489688>\
**Category:** Platform & Builds\
**Tags:** cross-platform, windows, engine-compile, Linux, unreal-engine, question\
**Created:** [October 9, 2021, 1:53am UTC](https://forums.unrealengine.com/t/unreal-engine-source-cross-compile-linux-libpthread-so-not-found/489688 "2021-10-09T01:53:20Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![anonymous\_user\_306fa419](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_306fa419](https://forums.unrealengine.com/u/anonymous_user_306fa419)\
**Post date:** [October 9, 2021, 1:53am UTC](https://forums.unrealengine.com/t/unreal-engine-source-cross-compile-linux-libpthread-so-not-found/489688/1 "2021-10-09T01:53:20Z")

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Hello.  
I have downloaded Unreal Engine 4.26.2 from source and build it for Windows.  
Now im trying to cross compile to linux using this [link text][1]

Now I get a error message saying “cannot open /lib64/libpthread.so.0: no such file or directory”.

 ![350101-2021-10-09-03-46-42-ue4-microsoft-visual-studio-ad.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/c/a/7/ca7c31f82c6b5e5e980df922821f32e6eccb8efd.png)

When I look in the UnrealToolChain, I can find the file in the path shown in the picture below.  
Does anyone know why I get the message?