/usr/lib/x86_64-linux-gnu/libwcs.so is in wcslib-dev 4.20-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libwcs.so.4
/usr/lib/x86_64-linux-gnu/libwcs.so.4