Cargo Features

tcp_ip has no features set by default.

[dependencies]
tcp_ip = { version = "0.1.8", features = ["global-ip-stack"] }
global-ip-stack = lazy_static

Affects ip_stack::ip_stack

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.

lazy_static global-ip-stack?