* include/cygwin/cygwin_dll.h: Update for modern compilers.

* lib/cygwin_crt0.c: Inexplicably need to define alloca for newer compilers.
* fhandler.h (fhandler_console): Add new method.
* fhandler.cc (fhandler_console::set_cursor_maybe): New method.
(fhandler_console::read): Set cursor if it has moved to make it visible.

winsup/cygwin/fhandler.h

@@ -573,6 +573,7 @@ private:
 /* Input calls */
   int igncr_enabled ();
   int input_tcsetattr (int a, const struct termios *t);
+  void set_cursor_maybe ();
 
 public: