Cygwin's default person interface will be the bash shell operating inside the mintty terminal emulator.[25] The DLL also implements pseudo terminal (pty) gadgets, and Cygwin ships with several terminal emulators which can be determined by them, like rxvt/urxvt and xterm. The Model of GCC that includes Cygwin has different extensions https://garrettfhiji.xzblogs.com/77511205/acgwin-no-further-a-mystery