#!/usr/bin/env bash

sudo brew update

sudo brew tap homebrew/versions
sudo brew install --enable-cxx gcc5

brew install boost

#!/usr/bin/env bash

sudo brew update

sudo brew tap homebrew/versions
sudo brew install --enable-cxx gcc5

brew outdated boost || brew upgrade boost

Update boost instead of installing
CI: Update boost instead of installing

TravisCI VMs come with boost pre-installed. So we'll
try to upgrade first. If the version isn't 1.56 or
better, we'll have to install boost manually like with
the linux builds.
