Merge from Gnulib

This incorporates:
2018-01-01 maint: Run 'make update-copyright'
2017-12-29 Add cross-compilation results for GNU/Hurd.
2017-12-12 explicit_bzero: port to macOS + Clang 9.0.0

build-aux/config.guess

@@ -2,7 +2,7 @@
 # Attempt to guess a canonical system name.
 #   Copyright 1992-2017 Free Software Foundation, Inc.
 
-timestamp='2017-11-07'
+timestamp='2017-12-17'
 
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -265,6 +265,9 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
     *:Redox:*:*)
 	echo ${UNAME_MACHINE}-unknown-redox
 	exit ;;
+    mips:OSF1:*.*)
+        echo mips-dec-osf1
+        exit ;;
     alpha:OSF1:*:*)
 	case $UNAME_RELEASE in
 	*4.0)

build-aux/config.sub

@@ -1416,7 +1416,7 @@ case $os in
 	      | -morphos* | -superux* | -rtmk* | -rtmk-nova* | -windiss* \
 	      | -powermax* | -dnix* | -nx6 | -nx7 | -sei* | -dragonfly* \
 	      | -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es* \
-	      | -onefs* | -tirtos* | -phoenix* | -fuchsia* | -redox*)
+	      | -onefs* | -tirtos* | -phoenix* | -fuchsia* | -redox* | -bme*)
 	# Remember, each alternative MUST END IN *, to match a version number.
 		;;
 	-qnx*)

build-aux/gitlog-to-changelog

@@ -9,7 +9,7 @@ my $VERSION = '2017-09-13 06:45'; # UTC
 # If you change this file with Emacs, please let the write hook
 # do its job.  Otherwise, update this string manually.
 
-# Copyright (C) 2008-2017 Free Software Foundation, Inc.
+# Copyright (C) 2008-2018 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

build-aux/move-if-change

@@ -8,7 +8,7 @@ VERSION='2017-09-13 06:45'; # UTC
 # If you change this file with Emacs, please let the write hook
 # do its job.  Otherwise, update this string manually.
 
-# Copyright (C) 2002-2017 Free Software Foundation, Inc.
+# Copyright (C) 2002-2018 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

build-aux/update-copyright

@@ -5,7 +5,7 @@ eval '(exit $?0)' && eval 'exec perl -wS -0777 -pi "$0" "$@"'
 
 my $VERSION = '2017-09-13.06:45'; # UTC
 
-# Copyright (C) 2009-2017 Free Software Foundation, Inc.
+# Copyright (C) 2009-2018 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

doc/misc/texinfo.tex

@@ -3,7 +3,7 @@
 % Load plain if necessary, i.e., if running under initex.
 \expandafter\ifx\csname fmtname\endcsname\relax\input plain\fi
 %
-\def\texinfoversion{2017-11-17.06}
+\def\texinfoversion{2017-12-26.21}
 %
 % Copyright 1985, 1986, 1988, 1990, 1991, 1992, 1993, 1994, 1995,
 % 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
@@ -2619,26 +2619,11 @@
 % Markup style infrastructure.  \defmarkupstylesetup\INITMACRO will
 % define and register \INITMACRO to be called on markup style changes.
 % \INITMACRO can check \currentmarkupstyle for the innermost
-% style and the set of \ifmarkupSTYLE switches for all styles
-% currently in effect.
-\newif\ifmarkupvar
-\newif\ifmarkupsamp
-\newif\ifmarkupkey
-%\newif\ifmarkupfile % @file == @samp.
-%\newif\ifmarkupoption % @option == @samp.
-\newif\ifmarkupcode
-\newif\ifmarkupkbd
-%\newif\ifmarkupenv % @env == @code.
-%\newif\ifmarkupcommand % @command == @code.
-\newif\ifmarkuptex % @tex (and part of @math, for now).
-\newif\ifmarkupexample
-\newif\ifmarkupverb
-\newif\ifmarkupverbatim
+% style.
 
 \let\currentmarkupstyle\empty
 
 \def\setupmarkupstyle#1{%
-  \csname markup#1true\endcsname
   \def\currentmarkupstyle{#1}%
   \markupstylesetup
 }
@@ -2700,11 +2685,15 @@
 % lilypond developers report.  xpdf does work with the regular 0x27.
 %
 \def\codequoteright{%
-  \expandafter\ifx\csname SETtxicodequoteundirected\endcsname\relax
-    \expandafter\ifx\csname SETcodequoteundirected\endcsname\relax
-      '%
+  \ifmonospace
+    \expandafter\ifx\csname SETtxicodequoteundirected\endcsname\relax
+      \expandafter\ifx\csname SETcodequoteundirected\endcsname\relax
+        '%
+      \else \char'15 \fi
     \else \char'15 \fi
-  \else \char'15 \fi
+   \else
+     '%
+   \fi
 }
 %
 % and a similar option for the left quote char vs. a grave accent.
@@ -2712,13 +2701,17 @@
 % the code environments to do likewise.
 %
 \def\codequoteleft{%
-  \expandafter\ifx\csname SETtxicodequotebacktick\endcsname\relax
-    \expandafter\ifx\csname SETcodequotebacktick\endcsname\relax
-      % [Knuth] pp. 380,381,391
-      % \relax disables Spanish ligatures ?` and !` of \tt font.
-      \relax`%
+  \ifmonospace
+    \expandafter\ifx\csname SETtxicodequotebacktick\endcsname\relax
+      \expandafter\ifx\csname SETcodequotebacktick\endcsname\relax
+        % [Knuth] pp. 380,381,391
+        % \relax disables Spanish ligatures ?` and !` of \tt font.
+        \relax`%
+      \else \char'22 \fi
     \else \char'22 \fi
-  \else \char'22 \fi
+   \else
+     \relax`%
+   \fi
 }
 
 % Commands to set the quote options.

lib/acl-errno-valid.c

 /* Test whether ACLs are well supported on this system.
 
-   Copyright 2013-2017 Free Software Foundation, Inc.
+   Copyright 2013-2018 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

lib/acl-internal.c

 /* Test whether a file has a nontrivial ACL.  -*- coding: utf-8 -*-
 
-   Copyright (C) 2002-2003, 2005-2017 Free Software Foundation, Inc.
+   Copyright (C) 2002-2003, 2005-2018 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

lib/acl-internal.h

 /* Internal implementation of access control lists.  -*- coding: utf-8 -*-
 
-   Copyright (C) 2002-2003, 2005-2017 Free Software Foundation, Inc.
+   Copyright (C) 2002-2003, 2005-2018 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

lib/acl.h

 /* acl.c - access control lists
 
-   Copyright (C) 2002, 2008-2017 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2008-2018 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

lib/acl_entries.c

 /* Return the number of entries in an ACL.
 
-   Copyright (C) 2002-2003, 2005-2017 Free Software Foundation, Inc.
+   Copyright (C) 2002-2003, 2005-2018 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

lib/alloca.in.h

 /* Memory allocation on the stack.
 
-   Copyright (C) 1995, 1999, 2001-2004, 2006-2017 Free Software Foundation,
+   Copyright (C) 1995, 1999, 2001-2004, 2006-2018 Free Software Foundation,
    Inc.
 
    This program is free software; you can redistribute it and/or modify it

lib/allocator.h

 /* Memory allocators such as malloc+free.
 
-   Copyright (C) 2011-2017 Free Software Foundation, Inc.
+   Copyright (C) 2011-2018 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

lib/arg-nonnull.h

 /* A C macro for declaring that specific arguments must not be NULL.
-   Copyright (C) 2009-2017 Free Software Foundation, Inc.
+   Copyright (C) 2009-2018 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

lib/at-func.c

 /* Define at-style functions like fstatat, unlinkat, fchownat, etc.
-   Copyright (C) 2006, 2009-2017 Free Software Foundation, Inc.
+   Copyright (C) 2006, 2009-2018 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

lib/binary-io.c

 /* Binary mode I/O.
-   Copyright 2017 Free Software Foundation, Inc.
+   Copyright 2017-2018 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

lib/binary-io.h

 /* Binary mode I/O.
-   Copyright (C) 2001, 2003, 2005, 2008-2017 Free Software Foundation, Inc.
+   Copyright (C) 2001, 2003, 2005, 2008-2018 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

lib/byteswap.in.h

 /* byteswap.h - Byte swapping
-   Copyright (C) 2005, 2007, 2009-2017 Free Software Foundation, Inc.
+   Copyright (C) 2005, 2007, 2009-2018 Free Software Foundation, Inc.
    Written by Oskar Liljeblad <oskar@osk.mine.nu>, 2005.
 
    This program is free software: you can redistribute it and/or modify

lib/c++defs.h

 /* C++ compatible function declaration macros.
-   Copyright (C) 2010-2017 Free Software Foundation, Inc.
+   Copyright (C) 2010-2018 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

lib/c-ctype.h

@@ -5,7 +5,7 @@
    <ctype.h> functions' behaviour depends on the current locale set via
    setlocale.
 
-   Copyright (C) 2000-2003, 2006, 2008-2017 Free Software Foundation, Inc.
+   Copyright (C) 2000-2003, 2006, 2008-2018 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

lib/c-strcase.h

 /* Case-insensitive string comparison functions in C locale.
-   Copyright (C) 1995-1996, 2001, 2003, 2005, 2009-2017 Free Software
+   Copyright (C) 1995-1996, 2001, 2003, 2005, 2009-2018 Free Software
    Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify

lib/c-strcasecmp.c

 /* c-strcasecmp.c -- case insensitive string comparator in C locale
-   Copyright (C) 1998-1999, 2005-2006, 2009-2017 Free Software Foundation, Inc.
+   Copyright (C) 1998-1999, 2005-2006, 2009-2018 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

lib/c-strncasecmp.c

 /* c-strncasecmp.c -- case insensitive string comparator in C locale
-   Copyright (C) 1998-1999, 2005-2006, 2009-2017 Free Software Foundation, Inc.
+   Copyright (C) 1998-1999, 2005-2006, 2009-2018 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

lib/careadlinkat.c

 /* Read symbolic links into a buffer without size limitation, relative to fd.
 
-   Copyright (C) 2001, 2003-2004, 2007, 2009-2017 Free Software Foundation,
+   Copyright (C) 2001, 2003-2004, 2007, 2009-2018 Free Software Foundation,
    Inc.
 
    This program is free software: you can redistribute it and/or modify

lib/careadlinkat.h

 /* Read symbolic links into a buffer without size limitation, relative to fd.
 
-   Copyright (C) 2011-2017 Free Software Foundation, Inc.
+   Copyright (C) 2011-2018 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

lib/cloexec.c

 /* cloexec.c - set or clear the close-on-exec descriptor flag
 
-   Copyright (C) 1991, 2004-2006, 2009-2017 Free Software Foundation, Inc.
+   Copyright (C) 1991, 2004-2006, 2009-2018 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

lib/cloexec.h

 /* cloexec.c - set or clear the close-on-exec descriptor flag
 
-   Copyright (C) 2004, 2009-2017 Free Software Foundation, Inc.
+   Copyright (C) 2004, 2009-2018 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

lib/close-stream.c

 /* Close a stream, with nicer error checking than fclose's.
 
-   Copyright (C) 1998-2002, 2004, 2006-2017 Free Software Foundation, Inc.
+   Copyright (C) 1998-2002, 2004, 2006-2018 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

lib/count-leading-zeros.h

 /* count-leading-zeros.h -- counts the number of leading 0 bits in a word.
-   Copyright (C) 2012-2017 Free Software Foundation, Inc.
+   Copyright (C) 2012-2018 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

lib/count-one-bits.h

 /* count-one-bits.h -- counts the number of 1-bits in a word.
-   Copyright (C) 2007-2017 Free Software Foundation, Inc.
+   Copyright (C) 2007-2018 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

lib/count-trailing-zeros.h

 /* count-trailing-zeros.h -- counts the number of trailing 0 bits in a word.
-   Copyright 2013-2017 Free Software Foundation, Inc.
+   Copyright 2013-2018 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

lib/diffseq.h

 /* Analyze differences between two vectors.
 
-   Copyright (C) 1988-1989, 1992-1995, 2001-2004, 2006-2017 Free Software
+   Copyright (C) 1988-1989, 1992-1995, 2001-2004, 2006-2018 Free Software
    Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify

lib/dirent.in.h

 /* A GNU-like <dirent.h>.
-   Copyright (C) 2006-2017 Free Software Foundation, Inc.
+   Copyright (C) 2006-2018 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

lib/dirfd.c

 /* dirfd.c -- return the file descriptor associated with an open DIR*
 
-   Copyright (C) 2001, 2006, 2008-2017 Free Software Foundation, Inc.
+   Copyright (C) 2001, 2006, 2008-2018 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

lib/dosname.h

 /* File names on MS-DOS/Windows systems.
 
-   Copyright (C) 2000-2001, 2004-2006, 2009-2017 Free Software Foundation, Inc.
+   Copyright (C) 2000-2001, 2004-2006, 2009-2018 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

lib/dtotimespec.c

 /* Convert double to timespec.
 
-   Copyright (C) 2011-2017 Free Software Foundation, Inc.
+   Copyright (C) 2011-2018 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

lib/dup2.c

 /* Duplicate an open file descriptor to a specified file descriptor.
 
-   Copyright (C) 1999, 2004-2007, 2009-2017 Free Software Foundation, Inc.
+   Copyright (C) 1999, 2004-2007, 2009-2018 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

lib/errno.in.h

 /* A POSIX-like <errno.h>.
 
-   Copyright (C) 2008-2017 Free Software Foundation, Inc.
+   Copyright (C) 2008-2018 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

lib/euidaccess.c

 /* euidaccess -- check if effective user id can access file
 
-   Copyright (C) 1990-1991, 1995, 1998, 2000, 2003-2006, 2008-2017 Free
+   Copyright (C) 1990-1991, 1995, 1998, 2000, 2003-2006, 2008-2018 Free
    Software Foundation, Inc.
 
    This file is part of the GNU C Library.

lib/execinfo.in.h

 /* Information about executables.
 
-   Copyright (C) 2012-2017 Free Software Foundation, Inc.
+   Copyright (C) 2012-2018 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

lib/explicit_bzero.c

 /* Erasure of sensitive data, generic implementation.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -40,7 +40,7 @@ explicit_bzero (void *s, size_t len)
   explicit_memset (s, 0, len);
 #else
   memset (s, '\0', len);
-# ifdef __GNUC__
+# if defined __GNUC__ && !defined __clang__
   /* Compiler barrier.  */
   asm volatile ("" ::: "memory");
 # endif

lib/faccessat.c

 /* Check the access rights of a file relative to an open directory.
-   Copyright (C) 2009-2017 Free Software Foundation, Inc.
+   Copyright (C) 2009-2018 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

lib/fcntl.c

 /* Provide file descriptor control.
 
-   Copyright (C) 2009-2017 Free Software Foundation, Inc.
+   Copyright (C) 2009-2018 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

lib/fcntl.in.h

 /* Like <fcntl.h>, but with non-working flags defined to 0.
 
-   Copyright (C) 2006-2017 Free Software Foundation, Inc.
+   Copyright (C) 2006-2018 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

lib/fdatasync.c

 /* Emulate fdatasync on platforms that lack it.
 
-   Copyright (C) 2011-2017 Free Software Foundation, Inc.
+   Copyright (C) 2011-2018 Free Software Foundation, Inc.
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public

lib/fdopendir.c

 /* provide a replacement fdopendir function
-   Copyright (C) 2004-2017 Free Software Foundation, Inc.
+   Copyright (C) 2004-2018 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

lib/filemode.c

 /* filemode.c -- make a string describing file modes
 
-   Copyright (C) 1985, 1990, 1993, 1998-2000, 2004, 2006, 2009-2017 Free
+   Copyright (C) 1985, 1990, 1993, 1998-2000, 2004, 2006, 2009-2018 Free
    Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify

lib/filemode.h

 /* Make a string describing file modes.
 
-   Copyright (C) 1998-1999, 2003, 2006, 2009-2017 Free Software Foundation,
+   Copyright (C) 1998-1999, 2003, 2006, 2009-2018 Free Software Foundation,
    Inc.
 
    This program is free software: you can redistribute it and/or modify

lib/filevercmp.c

 /*
    Copyright (C) 1995 Ian Jackson <iwj10@cus.cam.ac.uk>
    Copyright (C) 2001 Anthony Towns <aj@azure.humbug.org.au>
-   Copyright (C) 2008-2017 Free Software Foundation, Inc.
+   Copyright (C) 2008-2018 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

lib/filevercmp.h

 /*
    Copyright (C) 1995 Ian Jackson <iwj10@cus.cam.ac.uk>
    Copyright (C) 2001 Anthony Towns <aj@azure.humbug.org.au>
-   Copyright (C) 2008-2017 Free Software Foundation, Inc.
+   Copyright (C) 2008-2018 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

lib/flexmember.h

 /* Sizes of structs with flexible array members.
 
-   Copyright 2016-2017 Free Software Foundation, Inc.
+   Copyright 2016-2018 Free Software Foundation, Inc.
 
    This file is part of the GNU C Library.
 

lib/fpending.c

 /* fpending.c -- return the number of pending output bytes on a stream
-   Copyright (C) 2000, 2004, 2006-2007, 2009-2017 Free Software Foundation,
+   Copyright (C) 2000, 2004, 2006-2007, 2009-2018 Free Software Foundation,
    Inc.
 
    This program is free software: you can redistribute it and/or modify

lib/fpending.h

 /* Declare __fpending.
 
-   Copyright (C) 2000, 2003, 2005-2006, 2009-2017 Free Software Foundation,
+   Copyright (C) 2000, 2003, 2005-2006, 2009-2018 Free Software Foundation,
    Inc.
 
    This program is free software: you can redistribute it and/or modify

lib/fstatat.c

 /* Work around an fstatat bug on Solaris 9.