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 based on them, including rxvt/urxvt and xterm. The version of GCC that comes along with Cygwin https://acgwin42962.wizzardsblog.com/37055155/the-smart-trick-of-acgwin-that-no-one-is-discussing