+/* the name of the file descriptor member of DIR */
+#undef DIR_FD_MEMBER_NAME
+
+#ifdef DIR_FD_MEMBER_NAME
+# define DIR_TO_FD(Dir_p) ((Dir_p)->DIR_FD_MEMBER_NAME)
+#else
+# define DIR_TO_FD(Dir_p) -1
+#endif
+
+
+/* Define to 1 if // is a file system root distinct from /. */
+#undef DOUBLE_SLASH_IS_DISTINCT_ROOT
+
+/* Define if struct dirent has a member d_ino that actually works. */
+#undef D_INO_IN_DIRENT
+
+/* Define to 1 if your platform has fchownat, but it cannot perform lchown
+ tasks. */
+#undef FCHOWNAT_NOFOLLOW_BUG
+
+/* Define this to 1 if F_DUPFD behavior does not match POSIX */
+#undef FCNTL_DUPFD_BUGGY
+