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Graydon's wip repo for rust, not the main repo. See mozilla/rust instead.
Rust C Shell Makefile Python RenderScript Other
Pull request Compare This branch is 7045 commits behind rust-lang:master.
Latest commit b08d6cf @bors bors Auto merge of #24500 - pnkfelix:oflo-checked-neg, r=nikomatsakis
Add conditional overflow-checking to signed negate operator.

I argue this can land independently of #24420 , because one can write the implementation of `wrapped_neg()` inline if necessary (as illustrated in two cases on this PR).

This needs to go into beta channel.
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man environment variables -> environment
mk Auto merge of #24287 - brson:beta, r=steveklabnik
.gitattributes webfonts: proper fix
.gitignore gitignore: Add the autogenerated/downloaded unicode data files.
.gitmodules Use rust-installer for installation
.mailmap Update .mailmap
.travis.yml Allow travis to use newer-faster infrastructure for building. http://…
AUTHORS.txt Change my email Fix small typo in reference to code of conduct
COPYRIGHT copyright: update paths and entries
LICENSE-APACHE Update license, add license boilerplate to most files. Remainder will…
LICENSE-MIT Bump LICENSE copyright year mk: Add a printer helper to the make setup Strip trailing whitespace Tweak relese notes + rebase fixes
configure configure: Turn optimization back on iff --enable-optimize

The Rust Programming Language

This is a compiler for Rust, including standard libraries, tools and documentation. Rust is a systems programming language that is fast, memory safe and multithreaded, but does not employ a garbage collector or otherwise impose significant runtime overhead.

Quick Start

Read "Installing Rust" from The Book.

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:

    $ git clone
    $ cd rust
  3. Build and install:

    $ ./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.

Building on Windows

MSYS2 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.

    # 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 MYSY2 (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:

    $ ./configure
    $ make && make install


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:

  • Windows (7, 8, Server 2008 R2), x86 and x86-64 (64-bit support added in Rust 0.12.0)
  • Linux (2.6.18 or later, various distributions), x86 and x86-64
  • OSX 10.7 (Lion) or greater, x86 and x86-64

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

Getting Help

The Rust community congregates in a few places:


To contribute to Rust, please see CONTRIBUTING.

Rust has an IRC culture and most real-time collaboration happens in a variety of channels on Mozilla's IRC network, The most popular channel is #rust, a venue for general discussion about Rust, and a good place to ask for help.


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.


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