Version 2 Objective-C ABI may not be mixed with earlier versions

I am unable to compile and run a Obj-C program on UbuntuEnviroment:

Ubuntu Version: 22.04, 24.04

clang -v output:

Ubuntu clang version 14.0.0-1ubuntu1.1Target: x86_64-pc-linux-gnuThread model: posixInstalledDir: /usr/binFound candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/11Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/11Candidate multilib: .;@m64Selected multilib: .;@m64

Build Command:

clang++ -o checker checker.mm \-I/opt/homebrew/opt/openssl@3/include \-L/opt/homebrew/opt/openssl@3/lib \-I/usr/local/include \-isystem /usr/include/GNUstep \-isystem /usr/local/include/GNUstep \-L/usr/local/lib \-fobjc-runtime=gnustep-2.0 \-lssl -lcrypto -lgnustep-base -lobjc

Log with LD_DEBUG=libs shows that the lib at /usr/local/lib/libobjc.so.4.6 might be the reason, so I tried to compile that as well, first with

cd ~wget https://github.com/gnustep/libobjc2/archive/v2.2.1.tar.gztar xvzf v2.2.1.tar.gzcd libobjc2-2.2.1mkdir buildcd buildexport CC=`which clang`export CXX=`which clang++`cmake ..makesudo make installldconfig

Which, didn't work, then with script from https://github.com/plaurent/gnustep-build/tree/master which didn't resolve the issue either, right now I'm at a blind for what could be going on with my program.

Any and every help will be appriciated, thank you