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diff --git a/gnulib b/gnulib
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-Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1
diff --git a/gnulib/lib/regex-quote.h b/gnulib/lib/regex-quote.h
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+/* Construct a regular expression from a literal string.
+   Copyright (C) 1995, 2010-2011 Free Software Foundation, Inc.
+   Written by Bruno Haible <haible@clisp.cons.org>, 2010.
+
+   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 <http://www.gnu.org/licenses/>.  */
+
+#ifndef _REGEX_QUOTE_H
+#define _REGEX_QUOTE_H
+
+#include <stddef.h>
+#include <stdbool.h>
+
+
+/* Specifies a quotation task for converting a fixed string to a regular
+   expression pattern.  */
+struct regex_quote_spec
+{
+  /* True if the regular expression pattern consists of multibyte characters
+     (in the encoding given by the LC_CTYPE category of the locale),
+     false if it consists of single bytes or UTF-8 characters.  */
+  unsigned int /*bool*/ multibyte : 1;
+  /* True if the regular expression pattern shall match only entire lines.  */
+  unsigned int /*bool*/ anchored : 1;
+  /* Set of characters that need to be escaped (all ASCII), as a
+     NUL-terminated string.  */
+  char special[30 + 1];
+};
+
+
+/* Creates a quotation task that produces a POSIX regular expression, that is,
+   a pattern that can be compiled with regcomp().
+   CFLAGS can be 0 or REG_EXTENDED.
+   If it is 0, the result is a Basic Regular Expression (BRE)
+   <http://www.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_03>.
+   If it is REG_EXTENDED, the result is an Extended Regular Expression (ERE)
+   <http://www.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_04>.
+   If ANCHORED is false, the regular expression will match substrings of lines.
+   If ANCHORED is true, it will match only complete lines,  */
+extern struct regex_quote_spec
+       regex_quote_spec_posix (int cflags, bool anchored);
+
+/* Creates a quotation task that produces a regular expression that can be
+   compiled with the GNU API function re_compile_pattern().
+   SYNTAX describes the syntax of the regular expression (such as
+   RE_SYNTAX_POSIX_BASIC, RE_SYNTAX_POSIX_EXTENDED, RE_SYNTAX_EMACS, all
+   defined in <regex.h>).  It must be the same value as 're_syntax_options'
+   at the moment of the re_compile_pattern() call.
+   If ANCHORED is false, the regular expression will match substrings of lines.
+   If ANCHORED is true, it will match only complete lines,  */
+extern struct regex_quote_spec
+       regex_quote_spec_gnu (unsigned long /*reg_syntax_t*/ syntax, bool anchored);
+
+/* Creates a quotation task that produces a PCRE regular expression, that is,
+   a pattern that can be compiled with pcre_compile().
+   OPTIONS is the same value as the second argument passed to pcre_compile().
+   If ANCHORED is false, the regular expression will match substrings of lines.
+   If ANCHORED is true, it will match only complete lines,  */
+extern struct regex_quote_spec
+       regex_quote_spec_pcre (int options, bool anchored);
+
+
+/* Returns the number of bytes needed for the quoted string.  */
+extern size_t
+       regex_quote_length (const char *string, const struct regex_quote_spec *spec);
+
+/* Copies the quoted string to p and returns the incremented p.
+   There must be room for regex_quote_length (string, spec) + 1 bytes at p.  */
+extern char *
+       regex_quote_copy (char *p,
+                         const char *string, const struct regex_quote_spec *spec);
+
+/* Returns the freshly allocated quoted string.  */
+extern char *
+       regex_quote (const char *string, const struct regex_quote_spec *spec);
+
+
+#endif /* _REGEX_QUOTE_H */