Cargo Features

[dependencies]
cumulus-pallet-xcm = { version = "0.17.0", default-features = false, features = ["std", "try-runtime"] }
default = std

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

std default

Enables std of parity-scale-codec, cumulus-primitives-core, frame-support, frame-system, scale-info, sp-io, sp-runtime, and staging-xcm

try-runtime

Enables try-runtime of frame-support, frame-system, and sp-runtime

cumulus-pallet-xcm has 3 features without comments.