Cargo Features

[dependencies]
mquad = { version = "0.1.1", default-features = false, features = ["audio", "log-rs", "backtrace"] }
default = audio

The audio feature is set by default whenever mquad is added without default-features = false somewhere in the dependency tree.

audio default = quad-snd
log-rs = log

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.

backtrace implicit feature

Enables backtrace

backtrace:

A library to acquire a stack trace (backtrace) at runtime in a Rust program

log log-rs?
quad-snd audio