libc provides all of the definitions necessary to easily interoperate with C
code (or "C-like" code) on each of the platforms that Rust supports. This
includes type definitions (e.g. c_int), constants (e.g. EINVAL) as well as
function headers (e.g. malloc).
This crate exports all underlying platform types, functions, and constants under
the crate root, so all items are accessible as libc::foo. The types and values
of all the exported APIs match the platform that libc is compiled for.
More detailed information about the design of this library can be found in its associated RFC.
The main branch is now for v0.3 which has some breaking changes.
For v0.2, please submit PRs to the libc-0.2 branch instead.
We will stop making new v0.2 releases once we release v0.3 on crates.io.
See the tracking issue for details.
Add the following to your Cargo.toml:
[dependencies]
libc = "0.2"-
std: by defaultlibclinks to the standard library. Disable this feature to remove this dependency and be able to uselibcin#![no_std]crates. -
extra_traits: allstructs implemented inlibcareCopyandClone. This feature derivesDebug,Eq,Hash, andPartialEq. -
const-extern-fn: Changes someextern fns intoconst extern fns. If you use Rust >= 1.62, this feature is implicitly enabled. Otherwise it requires a nightly rustc. -
deprecated:
use_stdis deprecated, and is equivalent tostd.
The minimum supported Rust toolchain version is currently Rust 1.13.0. (libc does not currently have any policy regarding changes to the minimum supported Rust version; such policy is a work in progress.) APIs requiring newer Rust features are only available on newer Rust toolchains:
| Feature | Version |
|---|---|
union |
1.19.0 |
const mem::size_of |
1.24.0 |
repr(align) |
1.25.0 |
extra_traits |
1.25.0 |
core::ffi::c_void |
1.30.0 |
repr(packed(N)) |
1.33.0 |
cfg(target_vendor) |
1.33.0 |
const-extern-fn |
1.62.0 |
You can see the platform(target)-specific docs on docs.rs, select a platform you want to see.
See
ci/build.sh
for the platforms on which libc is guaranteed to build for each Rust
toolchain. The test-matrix at GitHub Actions and Cirrus CI show the
platforms in which libc tests are run.
This project is licensed under either of
at your option.
We welcome all people who want to contribute. Please see the contributing instructions for more information.
Contributions in any form (issues, pull requests, etc.) to this project must adhere to Rust's Code of Conduct.
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in libc by you, as defined in the Apache-2.0 license, shall be
dual licensed as above, without any additional terms or conditions.