Vagrant environment *similar* to Travis-CI for linux, but not identical.

Vagrantfile

# -*- mode: ruby -*-
# vi: set ft=ruby :

# It is recommended to install the vbguest plugin:
# vagrant plugin install vagrant-vbguest

# Vagrantfile API/syntax version. Don't touch unless you know what you're doing!
VAGRANTFILE_API_VERSION = "2"

def is_trusty
  return ENV.has_key?("WITH_TRUSTY") ? true : false
end

def ubuntu_version
  trusty = ENV.has_key?("WITH_TRUSTY") ? true : false 

  return trusty ? "trusty" : "precise"
end

def linux_vm(config)

  config.vm.box = "ubuntu/#{ubuntu_version}64"

  config.vm.provision "shell", privileged: true, inline: <<-EOF
    apt-get update -qq
    apt-get install -qq -y python-software-properties
  EOF

  if !is_trusty 
    config.vm.provision "shell", privileged: true, inline: <<-EOF
      apt-get install -qq -y python-software-properties
    EOF
  else 
    config.vm.provision "shell", privileged: true, inline: <<-EOF
      apt-get install -qq -y software-properties-common
    EOF
  end

  config.vm.provision "shell", privileged: true, inline: <<-EOF
    apt-get install -q -y git vim --no-install-recommends

    apt-add-repository -y ppa:ubuntu-toolchain-r/test # Toolchains

    apt-get update -qq

    apt-get install -y liblua5.1-0-dev libluajit-5.1-dev --no-install-recommends
  EOF

  if !is_trusty 
    # Precise
    config.vm.provision "shell", privileged: true, inline: <<-EOF
      apt-add-repository -y ppa:george-edison55/precise-backports # cmake
    EOF

  else
    # Trusty
    config.vm.provision "shell", privileged: true, inline: <<-EOF
      apt-add-repository ppa:george-edison55/cmake-3.x -y
    EOF
  end

  # Do an update:
  config.vm.provision "shell", privileged:true, inline: <<-EOF
    apt-get update -qq
    apt-get install bash-completion --reinstall
  EOF

  # CMake and Ninja
  config.vm.provision "shell", privileged:true, inline: <<-EOF
    apt-get install -y cmake cmake-data ninja-build --no-install-recommends
  EOF

  config.vm.provision "shell", privileged:true, inline: <<-EOF
    apt-get autoremove --purge -yy -qq
  EOF

  config.vm.provision :reload
end

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|

  config.vm.provider "virtualbox" do |v|
    v.memory = 2048
    v.cpus = 2

    # v.gui = true

    v.customize ["modifyvm", :id, "--cpuexecutioncap", "85"]
  end

  # Compilers:
  config.vm.define "gcc49", autostart: false do |gcc49|

    linux_vm gcc49

    cxx_pkgs = ['g++-4.9', 'gcc-4.9']

    gcc49.vm.provision "shell", privileged: true, inline: <<-EOF
      apt-get install -y #{cxx_pkgs.join(' ')}

      echo 'export CXX=#{cxx_pkgs[0]}' >> /etc/bash.bashrc
      echo 'export CC=#{cxx_pkgs[1]}' >> /etc/bash.bashrc
    EOF

  end

  config.vm.define "gcc5", autostart: false do |gcc5|
    linux_vm gcc5

    cxx_pkgs = ['g++-5', 'gcc-5']

    gcc5.vm.provision "shell", privileged: true, inline: <<-EOF
      apt-get install -y #{cxx_pkgs.join(' ')}

      echo 'export CXX=#{cxx_pkgs[0]}' >> /etc/bash.bashrc
      echo 'export CC=#{cxx_pkgs[1]}' >> /etc/bash.bashrc
    EOF
  end

  config.vm.define "clang36", autostart: false do |clang36|
    linux_vm clang36
    clang36.vm.provision "shell", privileged: true, inline: <<-EOF
      echo 'deb http://llvm.org/apt/#{ubuntu_version}/ llvm-toolchain-#{ubuntu_version}-3.6 main' >> /etc/apt/sources.list

      apt-get update -qq

      apt-get install -y clang-3.6 --force-yes

      echo 'export CXX=clang++-3.6' >> /etc/bash.bashrc
      echo 'export CC=clang-3.6' >> /etc/bash.bashrc
    EOF
  end

end