This document links to the relevant and updated V8 Wiki pages that describe how to download and build V8 on a Linux (Intel or ARM-based), Windows XP or Vista, Mac OS X 10.5+ and other platforms.
Download the source code
Download with GIT (recommended): UsingGIT
Download with SVN: Source
You can also browse the source tree online
Build on Linux, Windows and OSX: BuildingWithGYP
Compile D8 for Android devices and run it: D8OnAndroid
Please refer to the complete Wiki directory for more articles: V8 Wiki