Cross Compilation on Qt OPC UA Server on Raspberry Pi fails

Dear Community,

currently I am trying to cross compile an OPC UA Server Project with Qt Creator 5.15.2 on Raspberry Pi 4B Model.

For the cross compilation, I used the following installation guide: https://wapel.de/?p=842

My source code is based on the official waterpump example:
https://doc.qt.io/QtOPCUA/qtopcua-waterpump-waterpump-qmlcpp-example.html

My exact problem is:
The Relaese-Version of the Server does not deploy on the Raspberry Pi correctly.

After building the software, I get following error code within the error log window

/tmp/ccF0J1PW.s:-1: Error: Assembler messages:

The compiler log window shows this error description:

/tmp/ccF0J1PW.s: Assembler messages:
/tmp/ccF0J1PW.s:4206: IT blocks containing 32-bit Thumb instructions are deprecated in ARMv8
/tmp/ccF0J1PW.s:13562: IT blocks containing 32-bit Thumb instructions are deprecated in ARMv8
/tmp/ccF0J1PW.s:71648: IT blocks containing 32-bit Thumb instructions are deprecated in ARMv8

After running the Application with the error, I got the following Output in the Application Window:

Could not initialize server.
double free or corruption (fasttop)

My Qt-Development-Kit for Cross Compiling is using the following Compiler-Combination:

  • C++ Compiler: gcc-linaro-7.5.0-2019.12-x86_64_arm-linux-gnueabihf-g++

  • C Compiler: gcc-linaro-7.5.0-2019.12-x86_64_arm-linux-gnueabihf-gcc

Is there anyone who had the same problem?
I would be glad to get any tips, how to solve this.

By the way: I posted the same thread within the Qt Forum, but I didn`t got an answer ;)

https://forum.qt.io/topic/123832/qt-opcua-server-deployment-error

Thank you in Advance!