1.2.3

## Requirements

Ensure you have the following programs and libraries installed. Also see the subsections below for special requirements for your particular operating system.

The following are suggestions for getting more information about the programs and libraries needed to build Rubinius. Your operating system or package manager may have other packages available.

- GCC and G++ 4.x
- GNU Bison
- MRI Ruby 1.8.7+ If your system does not have Ruby 1.8.7 installed, consider using RVM to install it.
- Rubygems
- Git
- ZLib
- pthread - The pthread library should be installed by your operating system
- gmake
- rake `[sudo] gem install rake`

### Apple OS X

The easiest way to get a build environment on Apple OS X is to install the XCode Tools and Utilities. Once installed, you can enable developer mode crash reporting at: /Developer/Applications/Utilities/CrashReporterPrefs.app

### Debian/Ubuntu

- ruby-dev or ruby1.8-dev
- libreadline5-dev
- zlib1g-dev
- libssl-dev

### FreeBSD

Rubinius has a port in FreeBSD ports tree. It’s called `lang/rubinius`. You can find information about this port on http://freshports.org. Once being installed the port installs all the dependencies automagically.