Cygwin's default user interface will 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://andyoppqp.digitollblog.com/36918524/considerations-to-know-about-acgwin