Cargo Features

[dependencies]
orml-xcm = { version = "1.1.0", default-features = false, features = ["std", "try-runtime"] }
default = std

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

std default

Enables std of frame-support, frame-system, pallet-xcm, parity-scale-codec, scale-info, sp-std, and staging-xcm

try-runtime

Enables try-runtime of frame-support, frame-system, and pallet-xcm

orml-xcm has 3 features without comments.