pub extern crate libc can probably be used now.

[marmistrz]

https://github.com/nix-rust/nix/blob/master/src/lib.rs#L26

// In rust 1.8+ this should be `pub extern crate libc` but prior
// to https://github.com/rust-lang/rust/issues/26775 being resolved
// it is necessary to get a little creative.
pub mod libc {
    extern crate libc;
    pub use self::libc::*;
}

rust-lang/rust#26775 has already been closed.

[Susurrus]

Actually, it can't. See here for the original issue. And the release notes for Rust 1.4 suggest this is still the case.

I believe the solution is to do:

extern crate libc;
pub use libc

[jonas-schievink]

Nah this should work fine by now