-#elif defined __sferror /* FreeBSD, NetBSD, OpenBSD, MacOS X, Cygwin */
- fp->_flags |= __SERR;
+#elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
+ fp_->_flags |= __SERR;
+#elif defined __EMX__ /* emx+gcc */
+ fp->_flags |= _IOERR;