Crate features / libc
Feature flags · libc 0.2.191 · from crates.io 2026-10-24
libc features: what each one does, and the line to copy
Short answerlibc 0.2.191 has 6 features. By default it turns on std; add default-features = false to start from nothing. It needs Rust 1.65 or newer.
Pick features
Every feature
| Feature | In default | Turns on |
|---|---|---|
align | nothing else (a switch the code checks) | |
const-extern-fn | nothing else (a switch the code checks) | |
extra_traits | nothing else (a switch the code checks) | |
rustc-dep-of-std | align, rustc-std-workspace-core | |
std | yes | nothing else (a switch the code checks) |
use_std | std |
dep:x turns on the optional dependency x; x/y turns on feature y of dependency x (with ?, only if x is already on).
MSRV history
The minimum Rust version libc declares (rust-version), and the release that changed it:
- 0.2.163 (2024-11-16): Rust 1.19
- 0.2.164 (2024-11-16): Rust 1.63
- 0.2.184 (2026-04-01): Rust 1.65
Stuck on an older compiler? Pin the last version that supports it, for example cargo update -p libc --precise <version>, or use resolver 3, which picks compatible versions for you.
More on libc
Real downloads, dependents and alternatives: libc crate data (5M real downloads a day, 17,338 dependents).
docs.rs feature list · crates.io · license MIT OR Apache-2.0 · edition 2021
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