#$d_setpgrp HAS_SETPGRP /**/
#$d_bsdsetpgrp USE_BSD_SETPGRP /**/
+/* HAS__FWALK:
+ * This symbol, if defined, indicates that the _fwalk system call is
+ * available to apply a function to all the file handles.
+ */
+#$d__fwalk HAS__FWALK /**/
+
/* FCNTL_CAN_LOCK:
* This symbol, if defined, indicates that fcntl() can be used
* for file locking. Normally on Unix systems this is defined.