Cargo Features

clFFT has no features set by default.

[dependencies]
clfft = { version = "0.3.3", features = ["build_all"] }
build_all = cmake

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.

cmake build build_all?