For Linux systems, these will all be in your system's package
manager, and if you do development on the machine they're most
- likely already installed. I have no idea how to get these
- installed on OS X, you're on your own there.
+ likely already installed.
On OS X, these are all included in Apple's command line tools, which
- can be installed from [Xcode](developer.apple.com/technologies/tools/).
+ can be installed from [Xcode](http://developer.apple.com/technologies/tools/).
However, you may find that you need a newer version of Bison than the one provided
by Apple. This can be found in [Homebrew](http://mxcl.github.com/homebrew/)
or [MacPorts](http://macports.org/).