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diff --git a/gnulib b/gnulib
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-Subproject 4fc10daa05477586fea99b6b3ca02a87d1102fa
diff --git a/gnulib/lib/mbmemcasecoll.h b/gnulib/lib/mbmemcasecoll.h
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+++ b/gnulib/lib/mbmemcasecoll.h
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+/* Locale-specific case-ignoring memory comparison.
+   Copyright (C) 2001, 2009, 2010 Free Software Foundation, Inc.
+
+   This program 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 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2001.  */
+
+#ifndef MBMEMCASECOLL_H
+#define MBMEMCASECOLL_H
+
+#include <stdbool.h>
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Compare the memory regions S1 = [s1..s1+s1len-1], S2 = [s2..s2+s2len-1],
+   that contain character sequences, using the rules of the current locale,
+   ignoring case.
+   HARD_LC_COLLATE is false if the LC_COLLATE category of the current locale
+   is equivalent to the "C" locale.
+
+   This function's result is locale dependent.  Unlike memcasecmp(), it works
+   correctly in multibyte locales and also handles Turkish i / dotless i.
+   Unlike ulc_casecmp(), it does not handle the German sharp s and the Greek
+   final sigma.  Like memcoll() and ulc_casecoll(), it uses collation order.
+
+   Return a negative number if S1 < S2, a positive number if S1 > S2, 0 if
+   S1 and S2 have the same contents, or an unspecified value if there is an
+   error.
+   Set errno to an error number if there is an error, and to zero otherwise.
+
+   Note: This function may, in multibyte locales, return 0 for strings of
+   different lengths!  */
+
+extern int mbmemcasecoll (const char *s1, size_t s1len,
+                          const char *s2, size_t s2len,
+                          bool hard_LC_COLLATE);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MBMEMCASECOLL_H */