Cargo Features

[dependencies]
cumulus-primitives-proof-size-hostfunction = { version = "0.10.0", default-features = false, features = ["std"] }
default = std

The std feature is set by default whenever cumulus-primitives-proof-size-hostfunction is added without default-features = false somewhere in the dependency tree.

std default

Enables std of sp-externalities, sp-runtime-interface, and sp-trie

cumulus-primitives-proof-size-hostfunction has 2 features without comments.