Help! Android Packaging Error for armv7a

Development Platform & Builds Mobile
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1

I have trying everything to package a starter project for Android that supports both arm64 and armv7. But while packaging for armv7 it gives me linker error. Did tons of research through the whole internet, and kind of found out that the linker is trying to call or reference a function that still hasn’t been created and is part of the unwind library. But still cannot get it to work, also I’m new to ue4 so that hasn’t helped much.

The error is as follows:

`UATHelper: Packaging (Android (ETC2)):   PLATFORM_ANDROID_NDK_VERSION = 230100
UATHelper: Packaging (Android (ETC2)):   NDK toolchain: r23, NDK version: 31, GccVersion: 4.9, ClangVersion: 12.0.5
UATHelper: Packaging (Android (ETC2)):   Compiling Native 32-bit code with NDK API 'android-31'
UATHelper: Packaging (Android (ETC2)):   Compiling Native 64-bit code with NDK API 'android-31'
UATHelper: Packaging (Android (ETC2)):   Writing manifest to C:\Users\User1\Documents\Unreal Projects\Demo3AndroidCpp\Intermediate\Build\Manifest.xml
UATHelper: Packaging (Android (ETC2)):   Building Demo3AndroidCpp...
UATHelper: Packaging (Android (ETC2)):   Building 2 actions with 8 processes...
UATHelper: Packaging (Android (ETC2)):     [1/2] Demo3AndroidCpp-armv7.so
UATHelper: Packaging (Android (ETC2)):     ld.lld: error: undefined symbol: __aeabi_unwind_cpp_pr1
UATHelper: Packaging (Android (ETC2)):     >>> referenced by Module.Launch.cpp
UATHelper: Packaging (Android (ETC2)):     >>>               C:/Program Files/Epic Games/UE_4.27/Engine/Intermediate/Build/Android/UE4/Development/Launch/Module.Launch.cppa7.o:(.ARM.exidx.text._ZN16FAppEventManager11GetInstanceEv+0x0)
UATHelper: Packaging (Android (ETC2)):     >>> referenced by Module.Launch.cpp
UATHelper: Packaging (Android (ETC2)):     >>>               C:/Program Files/Epic Games/UE_4.27/Engine/Intermediate/Build/Android/UE4/Development/Launch/Module.Launch.cppa7.o:(.ARM.exidx.text._ZN16FAppEventManager15DequeueAppEventEv+0x0)
UATHelper: Packaging (Android (ETC2)):     >>> referenced by Module.Launch.cpp
UATHelper: Packaging (Android (ETC2)):     >>>               C:/Program Files/Epic Games/UE_4.27/Engine/Intermediate/Build/Android/UE4/Development/Launch/Module.Launch.cppa7.o:(.ARM.exidx.text._ZN16FAppEventManager17ReleaseMicrophoneEb+0x0)
UATHelper: Packaging (Android (ETC2)):     >>> referenced 161000 more times
UATHelper: Packaging (Android (ETC2)):   
UATHelper: Packaging (Android (ETC2)):     ld.lld: error: undefined symbol: __aeabi_unwind_cpp_pr0
UATHelper: Packaging (Android (ETC2)):     >>> referenced by Module.Launch.cpp
UATHelper: Packaging (Android (ETC2)):     >>>               C:/Program Files/Epic Games/UE_4.27/Engine/Intermediate/Build/Android/UE4/Development/Launch/Module.Launch.cppa7.o:(.ARM.exidx.text._ZN16FAppEventManager4TickEv+0x0)
UATHelper: Packaging (Android (ETC2)):     >>> referenced by Module.Launch.cpp
UATHelper: Packaging (Android (ETC2)):     >>>               C:/Program Files/Epic Games/UE_4.27/Engine/Intermediate/Build/Android/UE4/Development/Launch/Module.Launch.cppa7.o:(.ARM.exidx.text._ZZN16FAppEventManager4TickEvEN4Impl21ExecCheckImplInternalEv+0x0)
UATHelper: Packaging (Android (ETC2)):     >>> referenced by Module.Launch.cpp
UATHelper: Packaging (Android (ETC2)):     >>>               C:/Program Files/Epic Games/UE_4.27/Engine/Intermediate/Build/Android/UE4/Development/Launch/Module.Launch.cppa7.o:(.ARM.exidx.text._ZN16FAppEventManager17ExecWindowResizedEv+0x0)
UATHelper: Packaging (Android (ETC2)):     >>> referenced 369570 more times
UATHelper: Packaging (Android (ETC2)):     clang++: error: linker command failed with exit code 1 (use -v to see invocation)
PackagingResults: Error: undefined symbol: __aeabi_unwind_cpp_pr1
PackagingResults: Error: undefined symbol: __aeabi_unwind_cpp_pr0
PackagingResults: Error: linker command failed with exit code 1 (use -v to see invocation)
UATHelper: Packaging (Android (ETC2)): Took 32.2903757s to run UnrealBuildTool.exe, ExitCode=6
UATHelper: Packaging (Android (ETC2)): UnrealBuildTool failed. See log for more details. (C:\Users\User1\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Program+Files+Epic+Games+UE_4.27\UBT-Demo3AndroidCpp-Android-Development.txt)
UATHelper: Packaging (Android (ETC2)): AutomationTool exiting with ExitCode=6 (6)
UATHelper: Packaging (Android (ETC2)): BUILD FAILED
PackagingResults: Error: Unknown Error`

Any kind of instant help would be appreciated!

2

show me this screenshot

Screenshot_208
Screenshot_2081314×657 22.2 KB

what version of the engine? it is an engine from a github?

3

The screenshot is below:

image
image1350×771 105 KB

The Engine version is 4.27.2 and I downloaded and installed it through Epic Games Launcher.

4

Screenshot_209
Screenshot_209945×558 30 KB

5

need
ndk;21.4.7075529

6

So should I used ndk 21.4 instead of the latest ndk23?

7

Of course)

8

Ok, I am downloading it now and will let you know. Hold On!

9

Screenshot_210
Screenshot_210972×506 24.6 KB

1 Like
10

Hey, Thanks for your help. I don’t how I let it slip through my mind, because I did see the compatibility post earlier in UE4 docs. The build is successfully compiling for both armv7a and arm64 and I am able to package it.

Appreciate your help! Cheers!!

1 Like