Cargo Features

Reopen has no features set by default.

[dependencies]
reopen = { version = "1.0.3", features = ["signals"] }
signals = libc, signal-hook

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.

libc signals?
signal-hook signals?