Update from Gnulib

This incorporates:
2020-05-09 stdio: don't redefine _GL_ATTRIBUTE_FORMAT
2020-05-09 dirent, stdlib, string: don't redefine _GL_ATTRIBUTE_PURE
2020-05-08 limits-h: define LONG_BIT correctly on Haiku/x86_64
2020-05-08 ignore-value tests: use module 'attribute'
2020-05-06 attribute: minor style fixes
* build-aux/config.sub, doc/misc/texinfo.tex, lib/attribute.h:
* lib/dirent.in.h, lib/limits.in.h, lib/stdio.in.h, lib/stdlib.in.h:
* lib/string.in.h, m4/gnulib-common.m4:
Copy from Gnulib.

9 files changed, 93 insertions, 52 deletions

diff --git a/build-aux/config.sub b/build-aux/config.sub
index a0d12275ac5..973a2980ac3 100755
--- a/build-aux/config.sub
+++ b/build-aux/config.sub
@@ -2,7 +2,7 @@
 # Configuration validation subroutine script.
 #   Copyright 1992-2020 Free Software Foundation, Inc.
 
-timestamp='2020-04-24'
+timestamp='2020-05-04'
 
 # 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
@@ -1366,7 +1366,7 @@ case $os in
              | skyos* | haiku* | rdos* | toppers* | drops* | es* \
              | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
              | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
-             | nsk* | powerunix*)
+             | nsk* | powerunix* | genode*)
         # Remember, each alternative MUST END IN *, to match a version number.
                 ;;
         qnx*)
diff --git a/doc/misc/texinfo.tex b/doc/misc/texinfo.tex
index 427494cbbfc..2b7b31b34a9 100644
--- a/doc/misc/texinfo.tex
+++ b/doc/misc/texinfo.tex
@@ -3,9 +3,9 @@
 % Load plain if necessary, i.e., if running under initex.
 \expandafter\ifx\csname fmtname\endcsname\relax\input plain\fi
 %
-\def\texinfoversion{2020-05-02.00}
+\def\texinfoversion{2020-05-07.17}
 %
-% Copyright 1985, 1986, 1988, 1990-2019 Free Software Foundation, Inc.
+% Copyright 1985, 1986, 1988, 1990-2020 Free Software Foundation, Inc.
 %
 % This texinfo.tex file is free software: you can redistribute it and/or
 % modify it under the terms of the GNU General Public License as
@@ -1430,7 +1430,13 @@ output) for that.)}
       % subentries, which we calculated on our first read of the .toc above.
       %
       % We use the node names as the destinations.
+      %
+      % Currently we prefix the section name with the section number
+      % for chapter and appendix headings only in order to avoid too much
+      % horizontal space being required in the PDF viewer.
       \def\numchapentry##1##2##3##4{%
+        \dopdfoutline{##2 ##1}{count-\expnumber{chap##2}}{##3}{##4}}%
+      \def\unnchapentry##1##2##3##4{%
         \dopdfoutline{##1}{count-\expnumber{chap##2}}{##3}{##4}}%
       \def\numsecentry##1##2##3##4{%
         \dopdfoutline{##1}{count-\expnumber{sec##2}}{##3}{##4}}%
@@ -1672,9 +1678,13 @@ output) for that.)}
       % Therefore, we read toc only once.
       %
       % We use node names as destinations.
+      %
+      % Currently we prefix the section name with the section number
+      % for chapter and appendix headings only in order to avoid too much
+      % horizontal space being required in the PDF viewer.
       \def\partentry##1##2##3##4{}% ignore parts in the outlines
       \def\numchapentry##1##2##3##4{%
-        \dopdfoutline{##1}{1}{##3}{##4}}%
+        \dopdfoutline{##2 ##1}{1}{##3}{##4}}%
       \def\numsecentry##1##2##3##4{%
         \dopdfoutline{##1}{2}{##3}{##4}}%
       \def\numsubsecentry##1##2##3##4{%
@@ -1686,7 +1696,8 @@ output) for that.)}
       \let\appsecentry\numsecentry%
       \let\appsubsecentry\numsubsecentry%
       \let\appsubsubsecentry\numsubsubsecentry%
-      \let\unnchapentry\numchapentry%
+      \def\unnchapentry##1##2##3##4{%
+        \dopdfoutline{##1}{1}{##3}{##4}}%
       \let\unnsecentry\numsecentry%
       \let\unnsubsecentry\numsubsecentry%
       \let\unnsubsubsecentry\numsubsubsecentry%
@@ -2499,7 +2510,7 @@ end
 \def\it{\fam=\itfam \setfontstyle{it}}
 \def\sl{\fam=\slfam \setfontstyle{sl}}
 \def\bf{\fam=\bffam \setfontstyle{bf}}\def\bfstylename{bf}
-\def\tt{\fam=\ttfam \setfontstyle{tt}}
+\def\tt{\fam=\ttfam \setfontstyle{tt}}\def\ttstylename{tt}
 
 % Texinfo sort of supports the sans serif font style, which plain TeX does not.
 % So we set up a \sf.
@@ -3512,7 +3523,7 @@ end
 
 % @pounds{} is a sterling sign, which Knuth put in the CM italic font.
 %
-\def\pounds{{\it\$}}
+\def\pounds{\ifmonospace{\ecfont\char"BF}\else{\it\$}\fi}
 
 % @euro{} comes from a separate font, depending on the current style.
 % We use the free feym* fonts from the eurosym package by Henrik
@@ -3661,11 +3672,19 @@ end
 \fi
 
 % Quotes.
-\chardef\quotedblleft="5C
-\chardef\quotedblright=`\"
 \chardef\quoteleft=`\`
 \chardef\quoteright=`\'
 
+% only change font for tt for correct kerning and to avoid using
+% \ecfont unless necessary.
+\def\quotedblleft{%
+  \ifmonospace{\ecfont\char"10}\else{\char"5C}\fi
+}
+
+\def\quotedblright{%
+  \ifmonospace{\ecfont\char"11}\else{\char`\"}\fi
+}
+
 
 \message{page headings,}
 
@@ -7447,13 +7466,9 @@ might help (with 'rm \jobname.?? \jobname.??s')%
 \newdimen\tabw \setbox0=\hbox{\tt\space} \tabw=8\wd0 % tab amount
 %
 % We typeset each line of the verbatim in an \hbox, so we can handle
-% tabs.  The \global is in case the verbatim line starts with an accent,
-% or some other command that starts with a begin-group.  Otherwise, the
-% entire \verbbox would disappear at the corresponding end-group, before
-% it is typeset.  Meanwhile, we can't have nested verbatim commands
-% (can we?), so the \global won't be overwriting itself.
+% tabs.
 \newbox\verbbox
-\def\starttabbox{\global\setbox\verbbox=\hbox\bgroup}
+\def\starttabbox{\setbox\verbbox=\hbox\bgroup}
 %
 \begingroup
   \catcode`\^^I=\active
@@ -7464,7 +7479,8 @@ might help (with 'rm \jobname.?? \jobname.??s')%
       \divide\dimen\verbbox by\tabw
       \multiply\dimen\verbbox by\tabw % compute previous multiple of \tabw
       \advance\dimen\verbbox by\tabw  % advance to next multiple of \tabw
-      \wd\verbbox=\dimen\verbbox \box\verbbox \starttabbox
+      \wd\verbbox=\dimen\verbbox
+      \leavevmode\box\verbbox \starttabbox
     }%
   }
 \endgroup
@@ -7474,9 +7490,7 @@ might help (with 'rm \jobname.?? \jobname.??s')%
   \let\nonarrowing = t%
   \nonfillstart
   \tt % easiest (and conventionally used) font for verbatim
-  % The \leavevmode here is for blank lines.  Otherwise, we would
-  % never \starttabbox and the \egroup would end verbatim mode.
-  \def\par{\leavevmode\egroup\box\verbbox\endgraf}%
+  \def\par{\egroup\box\verbbox\endgraf\starttabbox}%
   \tabexpand
   \setupmarkupstyle{verbatim}%
   % Respect line breaks,
@@ -7484,7 +7498,6 @@ might help (with 'rm \jobname.?? \jobname.??s')%
   % make each space count.
   % Must do in this order:
   \obeylines \uncatcodespecials \sepspaces
-  \everypar{\starttabbox}%
 }
 
 % Do the @verb magic: verbatim text is quoted by unique
@@ -7519,9 +7532,12 @@ might help (with 'rm \jobname.?? \jobname.??s')%
   % ignore everything up to the first ^^M, that's the newline at the end
   % of the @verbatim input line itself.  Otherwise we get an extra blank
   % line in the output.
-  \xdef\doverbatim#1^^M#2@end verbatim{#2\noexpand\end\gobble verbatim}%
+  \xdef\doverbatim#1^^M#2@end verbatim{%
+    \starttabbox#2\egroup\noexpand\end\gobble verbatim}%
   % We really want {...\end verbatim} in the body of the macro, but
   % without the active space; thus we have to use \xdef and \gobble.
+  % The \egroup ends the \verbbox started at the end of the last line in
+  % the block.
 \endgroup
 %
 \envdef\verbatim{%
diff --git a/lib/attribute.h b/lib/attribute.h
index 8ef9a399ade..c5919d97005 100644
--- a/lib/attribute.h
+++ b/lib/attribute.h
@@ -33,26 +33,26 @@
 /* Selected GCC attributes; see:
    https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html
    These names begin with 'ATTRIBUTE_' to avoid name clashes.  */
-#define ATTRIBUTE_ALLOC_SIZE(args) _GL_ATTRIBUTE_ALLOC_SIZE(args)
+#define ATTRIBUTE_ALLOC_SIZE(args) _GL_ATTRIBUTE_ALLOC_SIZE (args)
 #define ATTRIBUTE_ALWAYS_INLINE _GL_ATTRIBUTE_ALWAYS_INLINE
 #define ATTRIBUTE_ARTIFICIAL _GL_ATTRIBUTE_ARTIFICIAL
 #define ATTRIBUTE_COLD _GL_ATTRIBUTE_COLD
 #define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST
 #define ATTRIBUTE_DEPRECATED _GL_ATTRIBUTE_DEPRECATED
-#define ATTRIBUTE_ERROR(msg) _GL_ATTRIBUTE_ERROR(msg)
+#define ATTRIBUTE_ERROR(msg) _GL_ATTRIBUTE_ERROR (msg)
 #define ATTRIBUTE_EXTERNALLY_VISIBLE _GL_ATTRIBUTE_EXTERNALLY_VISIBLE
-#define ATTRIBUTE_FORMAT(spec) _GL_ATTRIBUTE_FORMAT(spec)
+#define ATTRIBUTE_FORMAT(spec) _GL_ATTRIBUTE_FORMAT (spec)
 #define ATTRIBUTE_LEAF _GL_ATTRIBUTE_LEAF
 #define ATTRIBUTE_MAY_ALIAS _GL_ATTRIBUTE_MAY_ALIAS
 #define ATTRIBUTE_MALLOC _GL_ATTRIBUTE_MALLOC
 #define ATTRIBUTE_NOINLINE _GL_ATTRIBUTE_NOINLINE
-#define ATTRIBUTE_NONNULL(args) _GL_ATTRIBUTE_NONNULL(args)
+#define ATTRIBUTE_NONNULL(args) _GL_ATTRIBUTE_NONNULL (args)
 #define ATTRIBUTE_NONSTRING _GL_ATTRIBUTE_NONSTRING
 #define ATTRIBUTE_NOTHROW _GL_ATTRIBUTE_NOTHROW
 #define ATTRIBUTE_PACKED _GL_ATTRIBUTE_PACKED
 #define ATTRIBUTE_PURE _GL_ATTRIBUTE_PURE
 #define ATTRIBUTE_RETURNS_NONNULL _GL_ATTRIBUTE_RETURNS_NONNULL
-#define ATTRIBUTE_SENTINEL(pos) _GL_ATTRIBUTE_SENTINEL(pos)
-#define ATTRIBUTE_WARNING(msg) _GL_ATTRIBUTE_WARNING(msg)
+#define ATTRIBUTE_SENTINEL(pos) _GL_ATTRIBUTE_SENTINEL (pos)
+#define ATTRIBUTE_WARNING(msg) _GL_ATTRIBUTE_WARNING (msg)
 
 #endif /* _GL_ATTRIBUTE_H */
diff --git a/lib/dirent.in.h b/lib/dirent.in.h
index f7c26810158..6fa44f0d28d 100644
--- a/lib/dirent.in.h
+++ b/lib/dirent.in.h
@@ -57,10 +57,12 @@ typedef struct gl_directory DIR;
 
 /* The __attribute__ feature is available in gcc versions 2.5 and later.
    The attribute __pure__ was added in gcc 2.96.  */
-#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
-# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
-#else
-# define _GL_ATTRIBUTE_PURE /* empty */
+#ifndef _GL_ATTRIBUTE_PURE
+# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
+#  define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+# else
+#  define _GL_ATTRIBUTE_PURE /* empty */
+# endif
 #endif
 
 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
diff --git a/lib/limits.in.h b/lib/limits.in.h
index 90c273fa178..d25c5237060 100644
--- a/lib/limits.in.h
+++ b/lib/limits.in.h
@@ -15,16 +15,32 @@
    You should have received a copy of the GNU General Public License
    along with this program; if not, see <https://www.gnu.org/licenses/>.  */
 
-#ifndef _@GUARD_PREFIX@_LIMITS_H
-
 #if __GNUC__ >= 3
 @PRAGMA_SYSTEM_HEADER@
 #endif
 @PRAGMA_COLUMNS@
 
-/* The include_next requires a split double-inclusion guard.  */
+#if defined _GL_ALREADY_INCLUDING_LIMITS_H
+/* Special invocation convention:
+   On Haiku/x86_64, we have a sequence of nested includes
+   <limits.h> -> <syslimits.h> -> <limits.h>.
+   In this situation, LONG_MAX and INT_MAX are not yet defined,
+   therefore we should not attempt to define LONG_BIT.  */
+
 #@INCLUDE_NEXT@ @NEXT_LIMITS_H@
 
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_LIMITS_H
+
+# define _GL_ALREADY_INCLUDING_LIMITS_H
+
+/* The include_next requires a split double-inclusion guard.  */
+# @INCLUDE_NEXT@ @NEXT_LIMITS_H@
+
+# undef _GL_ALREADY_INCLUDING_LIMITS_H
+
 #ifndef _@GUARD_PREFIX@_LIMITS_H
 #define _@GUARD_PREFIX@_LIMITS_H
 
@@ -102,3 +118,4 @@
 
 #endif /* _@GUARD_PREFIX@_LIMITS_H */
 #endif /* _@GUARD_PREFIX@_LIMITS_H */
+#endif
diff --git a/lib/stdio.in.h b/lib/stdio.in.h
index 4a95f323a9a..6c338dd6c0b 100644
--- a/lib/stdio.in.h
+++ b/lib/stdio.in.h
@@ -62,10 +62,12 @@
    We enable _GL_ATTRIBUTE_FORMAT only if these are supported too, because
    gnulib and libintl do '#define printf __printf__' when they override
    the 'printf' function.  */
-#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
-# define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
-#else
-# define _GL_ATTRIBUTE_FORMAT(spec) /* empty */
+#ifndef _GL_ATTRIBUTE_FORMAT
+# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
+#  define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
+# else
+#  define _GL_ATTRIBUTE_FORMAT(spec) /* empty */
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_FORMAT_PRINTF
diff --git a/lib/stdlib.in.h b/lib/stdlib.in.h
index ec5f124a366..59f9e6c71d1 100644
--- a/lib/stdlib.in.h
+++ b/lib/stdlib.in.h
@@ -101,10 +101,12 @@ struct random_data
 
 /* The __attribute__ feature is available in gcc versions 2.5 and later.
    The attribute __pure__ was added in gcc 2.96.  */
-#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
-# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
-#else
-# define _GL_ATTRIBUTE_PURE /* empty */
+#ifndef _GL_ATTRIBUTE_PURE
+# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
+#  define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+# else
+#  define _GL_ATTRIBUTE_PURE /* empty */
+# endif
 #endif
 
 /* The definition of _Noreturn is copied here.  */
diff --git a/lib/string.in.h b/lib/string.in.h
index 596c99bf2e2..96e132f37d7 100644
--- a/lib/string.in.h
+++ b/lib/string.in.h
@@ -54,10 +54,12 @@
 
 /* The __attribute__ feature is available in gcc versions 2.5 and later.
    The attribute __pure__ was added in gcc 2.96.  */
-#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
-# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
-#else
-# define _GL_ATTRIBUTE_PURE /* empty */
+#ifndef _GL_ATTRIBUTE_PURE
+# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
+#  define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+# else
+#  define _GL_ATTRIBUTE_PURE /* empty */
+# endif
 #endif
 
 /* NetBSD 5.0 declares strsignal in <unistd.h>, not in <string.h>.  */
diff --git a/m4/gnulib-common.m4 b/m4/gnulib-common.m4
index b0010d0e351..f4ba5e3a00d 100644
--- a/m4/gnulib-common.m4
+++ b/m4/gnulib-common.m4
@@ -1,4 +1,4 @@
-# gnulib-common.m4 serial 49
+# gnulib-common.m4 serial 50
 dnl Copyright (C) 2007-2020 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -96,7 +96,7 @@ AC_DEFUN([gl_COMMON_BODY], [
 # define _GL_ATTR_returns_nonnull _GL_GNUC_PREREQ (4, 9)
 # define _GL_ATTR_sentinel _GL_GNUC_PREREQ (4, 0)
 # define _GL_ATTR_unused _GL_GNUC_PREREQ (2, 7)
-# define _GL_ATTR_warn_unused_result_GL_GNUC_PREREQ (3, 4)
+# define _GL_ATTR_warn_unused_result _GL_GNUC_PREREQ (3, 4)
 #endif
 
 ]dnl There is no _GL_ATTRIBUTE_ALIGNED; use stdalign's _Alignas instead.
@@ -122,7 +122,7 @@ AC_DEFUN([gl_COMMON_BODY], [
 /* Avoid __attribute__ ((cold)) on MinGW; see thread starting at
    <https://lists.gnu.org/r/emacs-devel/2019-04/msg01152.html>. */
 #if _GL_HAS_ATTRIBUTE (cold) && !defined __MINGW32__
-# define _GL_ATTRIBUTE_COLD __attribute__ ((cold))
+# define _GL_ATTRIBUTE_COLD __attribute__ ((__cold__))
 #else
 # define _GL_ATTRIBUTE_COLD
 #endif
@@ -142,8 +142,8 @@ AC_DEFUN([gl_COMMON_BODY], [
 #endif
 
 #if _GL_HAS_ATTRIBUTE (error)
-# define _GL_ATTRIBUTE_ERROR(msg) __attribute__((__error__ (msg)))
-# define _GL_ATTRIBUTE_WARNING(msg) __attribute__((__warning__ (msg)))
+# define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__error__ (msg)))
+# define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__warning__ (msg)))
 #else
 # define _GL_ATTRIBUTE_ERROR(msg)
 # define _GL_ATTRIBUTE_WARNING(msg)