Cargo Features

ufmt-stdio has no features set by default.

[dependencies]
ufmt-stdio = { version = "0.4.0", features = ["esp-uart", "esp-jtag"] }
esp-uart = critical-section
esp-jtag = critical-section

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.

critical-section riscv32 esp-jtag? esp-uart?