rust/README.md
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# The Rust Programming Language
Rust is a fast systems programming language that guarantees
memory safety and offers painless concurrency ([no data races]).
It does not employ a garbage collector and has minimal runtime overhead.
This repo contains the code for the compiler (`rustc`), as well
as standard libraries, tools and documentation for Rust.
[no data races]: http://blog.rust-lang.org/2015/04/10/Fearless-Concurrency.html
## Quick Start
Read ["Installing Rust"] from [The Book].
["Installing Rust"]: http://doc.rust-lang.org/book/installing-rust.html
[The Book]: http://doc.rust-lang.org/book/index.html
## Building from Source
1. Make sure you have installed the dependencies:
* `g++` 4.7 or `clang++` 3.x
* `python` 2.6 or later (but not 3.x)
* GNU `make` 3.81 or later
* `curl`
* `git`
2. Clone the [source] with `git`:
```sh
$ git clone https://github.com/rust-lang/rust.git
$ cd rust
```
[source]: https://github.com/rust-lang/rust
3. Build and install:
```sh
$ ./configure
$ make && make install
```
> ***Note:*** You may need to use `sudo make install` if you do not
> normally have permission to modify the destination directory. The
> install locations can be adjusted by passing a `--prefix` argument
> to `configure`. Various other options are also supported pass
> `--help` for more information on them.
When complete, `make install` will place several programs into
`/usr/local/bin`: `rustc`, the Rust compiler, and `rustdoc`, the
API-documentation tool. This install does not include [Cargo],
Rust's package manager, which you may also want to build.
[Cargo]: https://github.com/rust-lang/cargo
### Building on Windows
[MSYS2](http://msys2.github.io/) can be used to easily build Rust on Windows:
1. Grab the latest MSYS2 installer and go through the installer.
2. From the MSYS2 terminal, install the `mingw64` toolchain and other required
tools.
```sh
# Choose one based on platform:
$ pacman -S mingw-w64-i686-toolchain
$ pacman -S mingw-w64-x86_64-toolchain
$ pacman -S base-devel
```
3. Run `mingw32_shell.bat` or `mingw64_shell.bat` from wherever you installed
MSYS2 (i.e. `C:\msys`), depending on whether you want 32-bit or 64-bit Rust.
4. Navigate to Rust's source code, configure and build it:
```sh
$ ./configure
$ make && make install
```
## Notes
Since the Rust compiler is written in Rust, it must be built by a
precompiled "snapshot" version of itself (made in an earlier state of
development). As such, source builds require a connection to the Internet, to
fetch snapshots, and an OS that can execute the available snapshot binaries.
Snapshot binaries are currently built and tested on several platforms:
| Platform \ Architecture | x86 | x86_64 |
|--------------------------------|-----|--------|
| Windows (7, 8, Server 2008 R2) | ✓ | ✓ |
| Linux (2.6.18 or later) | ✓ | ✓ |
| OSX (10.7 Lion or later) | ✓ | ✓ |
You may find that other platforms work, but these are our officially
supported build environments that are most likely to work.
Rust currently needs about 1.5 GiB of RAM to build without swapping; if it hits
swap, it will take a very long time to build.
There is more advice about hacking on Rust in [CONTRIBUTING.md].
[CONTRIBUTING.md]: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md
## Getting Help
The Rust community congregates in a few places:
* [Stack Overflow] - Direct questions about using the language.
* [users.rust-lang.org] - General discussion and broader questions.
* [/r/rust] - News and general discussion.
[Stack Overflow]: http://stackoverflow.com/questions/tagged/rust
[/r/rust]: http://reddit.com/r/rust
[users.rust-lang.org]: http://users.rust-lang.org/
## Contributing
To contribute to Rust, please see [CONTRIBUTING](CONTRIBUTING.md).
Rust has an [IRC] culture and most real-time collaboration happens in a
variety of channels on Mozilla's IRC network, irc.mozilla.org. The
most popular channel is [#rust], a venue for general discussion about
Rust, and a good place to ask for help.
[IRC]: https://en.wikipedia.org/wiki/Internet_Relay_Chat
[#rust]: irc://irc.mozilla.org/rust
## License
Rust is primarily distributed under the terms of both the MIT license
and the Apache License (Version 2.0), with portions covered by various
BSD-like licenses.
See [LICENSE-APACHE](LICENSE-APACHE), [LICENSE-MIT](LICENSE-MIT), and [COPYRIGHT](COPYRIGHT) for details.