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diff --git a/builtins/bashgetopt.h b/builtins/bashgetopt.h
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+/* bashgetopt.h -- extern declarations for stuff defined in bashgetopt.c. */
+
+/* Copyright (C) 1993-2021 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash, the Bourne Again SHell.
+
+ Bash 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.
+
+ Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* See getopt.h for the explanation of these variables. */
+
+#if !defined (__BASH_GETOPT_H)
+# define __BASH_GETOPT_H
+
+#include <stdc.h>
+
+#define GETOPT_EOF -1
+#define GETOPT_HELP -99
+
+extern char *list_optarg;
+extern int list_optflags;
+
+extern int list_optopt;
+extern int list_opttype;
+
+extern WORD_LIST *lcurrent;
+extern WORD_LIST *loptend;
+
+extern int internal_getopt PARAMS((WORD_LIST *, char *));
+extern void reset_internal_getopt PARAMS((void));
+
+#endif /* !__BASH_GETOPT_H */