Copy from UE5.1.0 preview topic (in case people don’t read there):
Updated to 5.1.0P2. Brand new VRtemplate map fails to build for Quest. Error:
UATHelper: Packaging (Android (ASTC)): ld.lld: error: undefined symbol: __aarch64_swp8_acq_rel
UATHelper: Packaging (Android (ASTC)): >>> referenced by Module.Launch.cpp
PackagingResults: Error: undefined symbol: __aarch64_swp8_acq_rel
.. (lots of references to .cc files)
UATHelper: Packaging (Android (ASTC)): >>> referenced 775 more times
UATHelper: Packaging (Android (ASTC)): ld.lld: error: undefined symbol: __aarch64_ldadd4_acq_rel
Same happens to converted 5.0 project