librocksdb-sys-5.18.4 has been yanked.
Visit the last successful build:
librocksdb-sys-6.20.3
RocksDB bindings
Low-level bindings to RocksDB's C API.
Based on original work by Tyler Neely https://github.com/rust-rocksdb/rust-rocksdb and Jeremy Fitzhardinge https://github.com/jsgf/rocksdb-sys