Steps to checkout v8 source and initialize it properly. This includes tests, d8 and example projects.
## get source and initialize dependencies
git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git && cd depot_tools
export PATH=`pwd`:$PATH
cd ../
mkdir v8_checkout && cd v8_checkout
fetch v8 && cd v8
## Update projects
./build/gyp_v8
At this point on OSX you can also open build/all.xcodeproj
to open the project in Xcode.