Cygwin's default consumer interface may be the bash shell working inside the mintty terminal emulator.[25] The DLL also implements pseudo terminal (pty) devices, and Cygwin ships with a number of terminal emulators that are based on them, including rxvt/urxvt and xterm. The Variation of GCC that comes along with Cygwin https://keeganeeett.timeblog.net/72804499/getting-my-acgwin-to-work