/usr/x86_64-kfreebsd-gnu/bin/ar is in binutils-x86-64-kfreebsd-gnu 2.30-15ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/x86_64-kfreebsd-gnu/bin/../../bin/x86_64-kfreebsd-gnu-ar
/usr/x86_64-kfreebsd-gnu/bin/../../bin/x86_64-kfreebsd-gnu-ar