Illegal instruction error in libgrpc_csharp_ext.so on board with Cortex-A53(ARMv8)

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Nikolay Grishaev

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Dec 22, 2020, 3:46:34 AM12/22/20

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I build libgrpc_csharp_ext.x64.so as described on this page :
https://dev.to/erikest/grpc-on-dotnet-core-preview3-on-raspberrypi-3-4nf4

Trying to use instruction from this page https://github.com/grpc/grpc/blob/master/BUILDING.md

libgrpc_csharp_ext.x64.so placed to folder /usr/lib/

if start .Net 5.0 application on ODROID-C2 (Amlogic ARM Cortex-A53(ARMv8) 1.5Ghz quad core CPUs) with installed Ubuntu (trying 16.04 and 20.04), it crashed with one message in console : "Illegal instruction"

Any additional log with error I can't find

But if run this application with this library on ODROID-C4 (Cortex-A55 Core) - all work fine.

How (if it possible) fix error for ODROID-C2?

Links to

ODROID-C2 product page: https://www.hardkernel.com/shop/odroid-c2/
ODROID-C4 product page: https://www.hardkernel.com/shop/odroid-c4/