/usr/lib/rep/0.90.2/x86_64-pc-linux-gnu/sdbm.a is in librep-dev 0.90.2-1.4ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/rep/0.90.2/x86_64-pc-linux-gnu/rep/io/db/sdbm.a
/usr/lib/rep/0.90.2/x86_64-pc-linux-gnu/rep/io/db/sdbm.a