Cygwin's default person interface is the bash shell running in the mintty terminal emulator.[25] The DLL also implements pseudo terminal (pty) devices, and Cygwin ships with a number of terminal emulators which are according to them, together with rxvt/urxvt and xterm. The Variation of GCC that comes along with Cygwin https://acgwin96307.blogmazing.com/36153491/helping-the-others-realize-the-advantages-of-acgwin