Rosco-m68k Toolchain
How do I install these formulae?
brew install rosco-m68k/toolchain/<formula>
Or brew tap rosco-m68k/toolchain and then brew install <formula>.
Or install via URL (which will not receive updates):
brew install https://raw.githubusercontent.com/rosco-m68k/homebrew-toolchain/master/Formula/<formula>.rb
Documentation
brew help, man brew or check Homebrew's documentation.