# Build fails on ubuntu 18 (google colab) **URL:** \ **Category:** Platform & Builds\ **Tags:** ubuntu, Linux, unreal-engine, build-failed, question\ **Created:** [August 16, 2021, 11:13am UTC](https://forums.unrealengine.com/t/build-fails-on-ubuntu-18-google-colab/487343 "2021-08-16T11:13:20Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Bo2tor](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Bo2tor](https://forums.unrealengine.com/u/Bo2tor)\ **Post date:** [August 16, 2021, 11:13am UTC](https://forums.unrealengine.com/t/build-fails-on-ubuntu-18-google-colab/487343/1 "2021-08-16T11:13:20Z")
I follow the steps specified in [docs](https://microsoft.github.io/AirSim/build_linux/): ``` git clone -b 4.25 git@github.com:EpicGames/UnrealEngine.git ``` which results in: ``` Cloning into 'UnrealEngine'... Host key verification failed. fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists. ``` So I found a workaround by connecting my github account with EpicGames following the instructions [here](https://docs.unrealengine.com/4.26/en-US/SharingAndReleasing/Linux/BeginnerLinuxDeveloper/SettingUpAnUnrealWorkflow/). Then I fork the UnrealEngine [repo](https://github.com/EpicGames/UnrealEngine) which is a private repo and you can’t access it unless you connect your github account as specified earlier. Then I clone the fork: ``` git clone --depth 1 https://username:token@github.com/username/UnrealEngine.git ``` which results in ``` Cloning into 'UnrealEngine'... remote: Enumerating objects: 111586, done. remote: Counting objects: 100% (111586/111586), done. remote: Compressing objects: 100% (83748/83748), done. remote: Total 111586 (delta 26650), reused 92556 (delta 24736), pack-reused 0 Receiving objects: 100% (111586/111586), 236.57 MiB | 17.26 MiB/s, done. Resolving deltas: 100% (26650/26650), done. Checking out files: 100% (137999/137999), done. ``` Followed by the instructions specified in [docs](https://microsoft.github.io/AirSim/build_linux/) ``` cd UnrealEngine ./Setup.sh ./GenerateProjectFiles.sh make ``` Which work perfectly fine until I get an error at the later stages of the build as shown below. You can check the full build log [here](https://drive.google.com/file/d/11JjCTpVRjgXbHGIFcteQLgSo5QFKI1sE/view?usp=sharing) ``` ... truncated for readability ./v17_clang-10.0.1-centos7/x86_64-unknown-linux-gnu/usr/lib64/librpcsvc.a ./v17_clang-10.0.1-centos7/x86_64-unknown-linux-gnu/usr/lib64/libpthread.a ./v17_clang-10.0.1-centos7/x86_64-unknown-linux-gnu/usr/lib64/libmcheck.a ./v17_clang-10.0.1-centos7/x86_64-unknown-linux-gnu/usr/lib64/libnss_nisplus.so ./v17_clang-10.0.1-centos7/x86_64-unknown-linux-gnu/usr/lib64/crt1.o ./v17_clang-10.0.1-centos7/x86_64-unknown-linux-gnu/usr/lib64/libnss_dns.so ./v17_clang-10.0.1-centos7/x86_64-unknown-linux-gnu/usr/lib64/Scrt1.o ./v17_clang-10.0.1-centos7/x86_64-unknown-linux-gnu/usr/lib64/libc.a ./v17_clang-10.0.1-centos7/x86_64-unknown-linux-gnu/usr/lib64/libBrokenLocale.so ./v17_clang-10.0.1-centos7/x86_64-unknown-linux-gnu/usr/lib64/libnsl.a Target arch set to: x86_64-unknown-linux-gnu Building ThirdParty libraries If you don't see SUCCESS message in the end, then building did not finish properly. In that case, take a look into /content/UnrealEngine/Engine/Build/BatchFiles/Linux/BuildThirdParty.log for details. No third party libs needed to be built locally **********SUCCESS**************** Setup successful. Attempting to set up UE4 pretty printers for gdb (existing UE4Printers.py, if any, will be overwritten)... updated UE4Printers.py no ~/.gdbinit file found - creating a new one. Setting up Unreal Engine 4 project files... Fixing inconsistent case in filenames. Setting up Mono Generating data for project indexing... 100% Generating data for project indexing... 100% Writing project files... 100% Generating data for project indexing... 100% Generating data for project indexing... 100% Generating data for project indexing... 100% Generating data for project indexing... 100% Writing project files... 100% bash "/content/UnrealEngine/Engine/Build/BatchFiles/Linux/Build.sh" CrashReportClient Linux Shipping Fixing inconsistent case in filenames. Setting up Mono Running command : Engine/Binaries/DotNET/UnrealBuildTool.exe CrashReportClient Linux Shipping Using 'git status' to determine working set for adaptive non-unity build (/content/UnrealEngine). Creating makefile for CrashReportClient (no existing makefile) Creating makefile for UnrealHeaderTool (no existing makefile) ------- Build details -------- Using toolchain located at '/content/UnrealEngine/Engine/Extras/ThirdPartyNotUE/SDKs/HostLinux/Linux_x64/v17_clang-10.0.1-centos7/x86_64-unknown-linux-gnu'. Using clang (/content/UnrealEngine/Engine/Extras/ThirdPartyNotUE/SDKs/HostLinux/Linux_x64/v17_clang-10.0.1-centos7/x86_64-unknown-linux-gnu/bin/clang++) version '10.0.1' (string), 10 (major), 0 (minor), 1 (patch) Using bundled libc++ standard C++ library. Using lld linker Using llvm-ar : /content/UnrealEngine/Engine/Extras/ThirdPartyNotUE/SDKs/HostLinux/Linux_x64/v17_clang-10.0.1-centos7/x86_64-unknown-linux-gnu/bin/llvm-ar Using fast way to relink circularly dependent libraries (no FixDeps). ------------------------------ Performing 38 actions (2 in parallel) [1/38] Compile PCH.Core.h [2/38] Compile PCH.CoreUObject.h [3/38] Compile BuildSettings.cpp [4/38] Compile Module.TraceLog.cpp [5/38] Compile SharedPCH.Core.ShadowErrors.h [6/38] Compile Module.Core.4_of_14.cpp [7/38] Compile Module.Core.12_of_14.cpp [8/38] Compile Module.Core.11_of_14.cpp [9/38] Compile Module.Core.7_of_14.cpp [10/38] Compile Module.Core.10_of_14.cpp [11/38] Compile Module.Core.9_of_14.cpp [12/38] Compile Module.Core.2_of_14.cpp [13/38] Compile Module.Core.6_of_14.cpp [14/38] Compile Module.Core.5_of_14.cpp [15/38] Compile Module.Core.13_of_14.cpp [16/38] Compile Module.Core.8_of_14.cpp [17/38] Compile Module.Core.3_of_14.cpp [18/38] Compile Module.Core.1_of_14.cpp [19/38] Compile Module.Core.14_of_14.cpp [20/38] Link (lld) libUnrealHeaderTool-TraceLog.so [21/38] Link (lld) libUnrealHeaderTool-BuildSettings.so [22/38] Compile Module.Json.cpp [23/38] Link (lld) libUnrealHeaderTool-Core.so [24/38] Compile Module.Projects.cpp [25/38] Link (lld) libUnrealHeaderTool-Json.so [26/38] Compile Module.CoreUObject.6_of_8.cpp [27/38] Link (lld) libUnrealHeaderTool-Projects.so [28/38] Compile Module.CoreUObject.2_of_8.cpp [29/38] Compile Module.CoreUObject.7_of_8.cpp [30/38] Compile Module.CoreUObject.1_of_8.cpp [31/38] Compile Module.CoreUObject.8_of_8.cpp [32/38] Compile Module.CoreUObject.4_of_8.cpp [33/38] Compile Module.CoreUObject.5_of_8.cpp [34/38] Compile Module.CoreUObject.3_of_8.cpp [35/38] Compile Module.UnrealHeaderTool.cpp [36/38] Link (lld) libUnrealHeaderTool-CoreUObject.so [37/38] Link (lld) UnrealHeaderTool [38/38] UnrealBuildTool.exe UnrealHeaderTool.target Total time in Local executor: 472.22 seconds Parsing headers for CrashReportClient Running UnrealHeaderTool CrashReportClient "/content/UnrealEngine/Engine/Intermediate/Build/Linux/B4D820EA/CrashReportClient/Shipping/CrashReportClient.uhtmanifest" -LogCmds="loginit warning, logexit warning, logdatabase error" -Unattended -WarningsAsErrors -abslog="/content/UnrealEngine/Engine/Programs/UnrealBuildTool/Log_UHT.txt" src/tcmalloc.cc:283] Attempt to free invalid pointer 0x7fab74511030 Makefile:327: recipe for target 'CrashReportClient-Linux-Shipping' failed make: *** [CrashReportClient-Linux-Shipping] Error 3 ``` I tried solutions to similar issues proposed [here](https://github.com/microsoft/AirSim/issues/686), [here](https://forums.unrealengine.com/t/unreal-fails-to-build-on-linux/77732), and [here](https://www.reddit.com/r/unrealengine/comments/hs9mv6/build_failed_in_linux_ubuntu_1804_recipe_for/) and nothing seems to fix the problem, and some cause other errors. ---
**Author:** ![chimsd](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@chimsd](https://forums.unrealengine.com/u/chimsd)\ **Post date:** [February 4, 2022, 7:15pm UTC](https://forums.unrealengine.com/t/build-fails-on-ubuntu-18-google-colab/487343/2 "2022-02-04T19:15:10Z")
The super cool effort did you find any way?