Unable to build PySide6.2.4 for Raspbian Bullseye

I'm tryinng to setup PySide6 on Raspbian BullEye and seems to be running into some build issues. Steps I've followed till now:

1. Create fresh OS of Raspbian on SD card and setup all basic configs. 
2. Setup and configure Clang 9 (for arm7l) following [link - Clang 9|[Raspberry Pi - Install Clang 9 and compile C++17 and C++20 programs | Solarian Programmer|https://solarianprogrammer.com/2018/04/22/raspberry-pi-raspbian-install-clang-compile-cpp-17-programs/]] 
3. Build Qt and selected modules following this link - [qt |https://www.tal.org/tutorials/building-qt-62-raspberry-pi]
4. Install dependencies and then download and build PySide [Qt |https://doc.qt.io/qtforpython/gettingstarted-linux.html]

My Build Command - 

python3 setup.py build --qtpaths=/opt/Qt/6.2.4-armv7l/bin/qtpaths --build-tests --debug --ignore-git --parallel=8 --verbose-build --standalone

Install Command - 

python3 setup.py install --qtpaths=/opt/Qt/6.2.4-armv7l/bin/qtpaths --build-tests --ignore-git --parallel=8 --verbose-build --standalone

In both casesRuntimeError:
setup.py invocation failed with exit code: 1., the process fails with exit message 

Attached are error log for build and install process. 

-----------------------------------------------------------------------------------

Edit 1: 

I went back to the official web for building pyside2 pyside2 , to try their CLANG repo which i ignored initially as its built for linux readhat and not for raspbian however I decided to give it a try. Although the pyside built failed when using this CLANG files, I then went back to using arm7l CLANG that i installed initially and for reason unknown, the build process did manage to move forward.  After 4-5 hours of build process however I am getting some error right at the end of the process.  I've attached three new files capturing the error I am currently getting

1. newerror.txt - error message copied from terminal

2. CMakeOutput.log

3. CMakeError.log

Hope this will help narrow down the issue.