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diff --git a/Build/source/texk/kpathsea/expand.h b/Build/source/texk/kpathsea/expand.h
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+/* expand.h: general expansion.
+
+ Copyright 1993, 1994, 1996, 2008, 2011, 2018 Karl Berry.
+ Copyright 1999, 2005 Olaf Weber.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this library; if not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef KPATHSEA_EXPAND_H
+#define KPATHSEA_EXPAND_H
+
+#include <kpathsea/c-proto.h>
+#include <kpathsea/types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef MAKE_KPSE_DLL /* libkpathsea internal only */
+
+/* Call kpse_var_expand and kpse_tilde_expand (in that order). Result
+ is always in fresh memory, even if no expansions were done. */
+extern string kpathsea_expand (kpathsea kpse, const_string s);
+
+#endif /* MAKE_KPSE_DLL */
+
+/* Do brace expansion and call `kpathsea_expand' on each element of the
+ result; return the final expansion (always in fresh memory, even if
+ no expansions were done). We don't call `kpse_expand_default'
+ because there is a whole sequence of defaults to run through; see
+ `kpse_init_format'. */
+extern KPSEDLL string kpathsea_brace_expand (kpathsea kpse, const_string path);
+
+/* Do brace expansion and call `kpse_expand' on each argument of the
+ result, then expand any `//' constructs. The final expansion (always
+ in fresh memory) is a path of all the existing directories that match
+ the pattern. */
+extern KPSEDLL string kpathsea_path_expand (kpathsea kpse, const_string path);
+
+#if defined(KPSE_COMPAT_API)
+extern KPSEDLL string kpse_brace_expand (const_string path);
+extern KPSEDLL string kpse_path_expand (const_string path);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* not KPATHSEA_EXPAND_H */