Cargo Features

[dependencies]
bp-bridge-hub-cumulus = { version = "0.18.0", default-features = false, features = ["std"] }
default = std

The std feature is set by default whenever bp-bridge-hub-cumulus is added without default-features = false somewhere in the dependency tree.

std default

Enables std of bp-messages, bp-polkadot-core, bp-runtime, frame-support, frame-system, polkadot-primitives, sp-api, and sp-std

bp-bridge-hub-cumulus has 2 features without comments.