```ruby
require 'formula'

class ArmNoneEabiGcc < Formula

  homepage 'https://developer.arm.com/open-source/gnu-toolchain/gnu-rm/downloads'
  version '6-2017-q1-update'

  url 'https://developer.arm.com/-/media/Files/downloads/gnu-rm/6_1-2017q1/gcc-arm-none-eabi-6-2017-q1-update-mac.tar.bz2'
  sha256 'de4de95b09740272aa95ca5a43bb234ba29c323eddcad2ee34e901eebda910a2'

  def install
    system 'cp', '-r', 'arm-none-eabi', 'bin', 'lib', 'share', "#{prefix}/"
  end
end
```

Update ARM gcc to `6-2017-q2-update`
user
```ruby
require 'formula'

class ArmNoneEabiGcc < Formula

  homepage 'https://developer.arm.com/open-source/gnu-toolchain/gnu-rm/downloads'
  version '6-2017-q2-update'

  url 'https://developer.arm.com/-/media/Files/downloads/gnu-rm/6-2017q2/gcc-arm-none-eabi-6-2017-q2-update-mac.tar.bz2'
  sha256 '7d3080514a2899d05fc55466cdc477e2448b6a62f536ffca3dd846822ff52900'

  def install
    system 'cp', '-r', 'arm-none-eabi', 'bin', 'lib', 'share', "#{prefix}/"
  end
end
```
assistant