-#elif defined __sferror /* FreeBSD, NetBSD, OpenBSD, MacOS X, Cygwin */
- fp->_p += increment;
- fp->_r -= increment;
+#elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
+ fp_->_p += increment;
+ fp_->_r -= increment;
+#elif defined __EMX__ /* emx+gcc */
+ fp->_ptr += increment;
+ fp->_rcount -= increment;