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