Some essential patches to fix compilation errors on Ubuntu 20.04 for ...
https://github.com/Tina-Linux/tina-V83x/tree/master
commit 27b207db2fdebf1ce25e7d65b54a00b9c63ca10e
usage:
cd tina-V83x
patch -p1 < /path/to/tina-V83x-patches/tina-V83x-on-ubuntu-20.patch