Cargo Features

[dependencies]
tiny-xlib = { version = "0.2.3", default-features = false, features = ["dlopen", "tracing"] }
default = tracing

The tracing feature is set by default whenever tiny-xlib is added without default-features = false somewhere in the dependency tree.

dlopen = libloading

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.

libloading dlopen?
tracing default