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Be explicit about using crates.io's libc crate #28063

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Aug 28, 2015
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Be explicit about using crates.io's libc crate #28063

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8 changes: 5 additions & 3 deletions src/doc/trpl/ffi.md
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Expand Up @@ -496,9 +496,11 @@ strings are not terminated with `\0`. If you need a NUL-terminated string for
interoperability with C, you should use the `CString` type in the `std::ffi`
module.

The standard library includes type aliases and function definitions for the C
standard library in the `libc` module, and Rust links against `libc` and `libm`
by default.
The [`libc` crate on crates.io][libc] includes type aliases and function
definitions for the C standard library in the `libc` module, and Rust links
against `libc` and `libm` by default.

[libc]: https://crates.io/crates/libc

# The "nullable pointer optimization"

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