Skip to content

Mention libc from crates.io in TRPL: FFI #29888

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Nov 18, 2015
Merged

Mention libc from crates.io in TRPL: FFI #29888

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
17 changes: 17 additions & 0 deletions src/doc/trpl/ffi.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,23 @@ foreign code. Rust is currently unable to call directly into a C++ library, but
snappy includes a C interface (documented in
[`snappy-c.h`](https://github.com/google/snappy/blob/master/snappy-c.h)).

## A note about libc

Many of these examples use [the `libc` crate][libc], which provides various
type definitions for C types, among other things. If you’re trying these
examples yourself, you’ll need to add `libc` to your `Cargo.toml`:

```toml
[dependencies]
libc = "0.2.0"
```

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

and add `extern crate libc;` to your crate root.

## Calling foreign functions

The following is a minimal example of calling a foreign function which will
compile if snappy is installed:

Expand Down