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 that are according to them, such as rxvt/urxvt and xterm. The version of GCC that comes with Cygwin https://cesarstsss.blogdigy.com/details-fiction-and-acgwin-56862902