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diff --git a/gl/lib/renameatu.h b/gl/lib/renameatu.h
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+/* Rename a file relative to open directories.
+ Copyright 2017-2022 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+/* written by Paul Eggert */
+
+/* Get RENAME_* macros from <stdio.h> if present, otherwise supply
+ the traditional Linux values. */
+#include <stdio.h>
+#ifndef RENAME_NOREPLACE
+# define RENAME_NOREPLACE (1 << 0)
+# define RENAME_EXCHANGE (1 << 1)
+# define RENAME_WHITEOUT (1 << 2)
+#endif
+
+extern int renameatu (int, char const *, int, char const *, unsigned int);