Cargo Features

[dependencies]
bdwgc-alloc = { version = "0.6.8", default-features = false, features = ["cmake", "autotools"] }
default = autotools

The autotools feature is set by default whenever bdwgc-alloc is added without default-features = false somewhere in the dependency tree.

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features.

cmake build implicit feature

Enables cmake

cmake:

A build dependency for running cmake to build a native library

autotools build default