Want to build a clobber of Firefox in 5 minutes on your Mac laptop in the Toronto office? Here are the instructions for you!

NOTE: This version of icecc doesn't seem to work correctly on macOS 10.12. https://github.com/mstange/icecc-osx-moztor has an updated version which may work better for more recent xcode versions.

Install the prerequisites (I recommend using homebrew)

$ xcode-select --install  # Make sure to re-run this command when you update xcode
$ brew install lzo

Clone this repository, this will take a while because it contains a binary copy of a clang toolchain (which is a gross thing to keep in git, I know)

$ git clone https://github.com/mystor/icecc-osx-moztor ~/icecream

Install the daemon. This will create a launchd plist which will be run on startup. The argument passed to the install.sh script is the scheduler to connect to.

$ sudo ~/icecream/install.sh 10.242.24.68

Update your mozconfig to point cc and c++ to the compiler wrappers

CC="$HOME/icecream/cc"
CXX="$HOME/icecream/c++"

Build firefox with sufficient jobs to saturate your network! (NOTE: If you get failures due to posix_spawn failing, use a lower job count, as your computer is failing to create more processes).

$ ./mach build -j100

Use a wired connection when building with icecream. Performance over WiFi is not nearly as good as performance over a wired LAN connection. On the same note, I also discourage you from building over the VPN due to latency issues.

If your builds seem to be hanging without building, you can try restarting your iceccd. The easiest way to do that is to find it in Activity Monitor and kill it, the launchd should restart it automatically.

Setting the CC and CXX environment variables like in the mozconfig will probably do the right thing for just about any build system. Just make sure to set the job count high enough.

Currently the version of iceccd running locally doesn't dispatch objective-c files to the network, instead building them locally. This greatly slows down the build, at least partially because many of the jobs are taken up with waiting objective-c builds. To fix this, the icecream daemons on every computer in the office will need to be patched with Benoit's patch, but this hasn't been done yet.

Either ask someone on a linux computer to run icemon to get pretty graphics, or telnet into the server,

$ telnet 10.242.24.68 8766