
These are still used in Homebrew/homebrew-core. The others are either - default (Os on macOS, O2 on Linux) - less reliable than the default (O3) While we're here, also remove an outdated `ncurses_define` comment.
Library
This directory contains all the code run by the official brew
and brew cask
commands in Homebrew
and all formulae (package descriptions) in taps (repositories containing formulae) in Taps
subdirectories.