Cygwin's default person interface is definitely 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, such as rxvt/urxvt and xterm. The version of GCC that comes with Cygwin https://marioqsrqq.blogminds.com/considerations-to-know-about-acgwin-34069349