Cygwin's default consumer interface would be 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, which includes rxvt/urxvt and xterm. The Edition of GCC that comes with Cygwin https://acgwin39630.blue-blogs.com/44700937/everything-about-acgwin