Cargo Features

zenoh-shm has no features set by default.

[dependencies]
zenoh-shm = { version = "1.0.3", features = ["test"] }
test = num_cpus

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

num_cpus test?