#elif defined __EMX__ /* emx+gcc */
fp->_ptr += increment;
fp->_rcount -= increment;
#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw */
#elif defined __EMX__ /* emx+gcc */
fp->_ptr += increment;
fp->_rcount -= increment;
#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw */