thanks, I did following commands:
but boot folder “/” is still read-only mode. I need to add lib folder just under boot folder, /lib/my.lib.
because the sharing lib of object executable file is to /lib folder:
ELF executable, 64-bit LSB arm64, dynamic (/lib/ld-linux-aarch64.so.1), BuildID=90fe6da411d0e449bcd5e4df76b2666e4f79ab97, not stripped