Lib.rs

Cargo Features

[dependencies]
librdkafka-sys = { version = "0.9.2-0", default-features = false, features = ["sasl", "ssl", "zlib"] }

default = zlib

The zlib feature is set by default whenever librdkafka-sys is added without default-features = false somewhere in the dependency tree.

sasl = ssl

ssl sasl?

zlib default

librdkafka-sys has 4 features without comments.