Update from Gnulib by running admin/merge-gnulib

build-aux/config.guess

@@ -4,7 +4,7 @@
 
 # shellcheck disable=SC2006,SC2268 # see below for rationale
 
-timestamp='2023-06-23'
+timestamp='2023-07-20'
 
 # 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
@@ -976,7 +976,27 @@ EOF
 	GUESS=$UNAME_MACHINE-unknown-minix
 	;;
     aarch64:Linux:*:*)
-	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	set_cc_for_build
+	CPU=$UNAME_MACHINE
+	LIBCABI=$LIBC
+	if test "$CC_FOR_BUILD" != no_compiler_found; then
+	    ABI=64
+	    sed 's/^	    //' << EOF > "$dummy.c"
+	    #ifdef __ARM_EABI__
+	    #ifdef __ARM_PCS_VFP
+	    ABI=eabihf
+	    #else
+	    ABI=eabi
+	    #endif
+	    #endif
+EOF
+	    cc_set_abi=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^ABI' | sed 's, ,,g'`
+	    eval "$cc_set_abi"
+	    case $ABI in
+		eabi | eabihf) CPU=armv8l; LIBCABI=$LIBC$ABI ;;
+	    esac
+	fi
+	GUESS=$CPU-unknown-linux-$LIBCABI
 	;;
     aarch64_be:Linux:*:*)
 	UNAME_MACHINE=aarch64_be
@@ -1042,6 +1062,15 @@ EOF
     k1om:Linux:*:*)
 	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
 	;;
+    kvx:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    kvx:cos:*:*)
+	GUESS=$UNAME_MACHINE-unknown-cos
+	;;
+    kvx:mbr:*:*)
+	GUESS=$UNAME_MACHINE-unknown-mbr
+	;;
     loongarch32:Linux:*:* | loongarch64:Linux:*:*)
 	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
 	;;

build-aux/config.sub

@@ -4,7 +4,7 @@
 
 # shellcheck disable=SC2006,SC2268 # see below for rationale
 
-timestamp='2023-06-26'
+timestamp='2023-07-31'
 
 # 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
@@ -1206,6 +1206,7 @@ case $cpu-$vendor in
 			| i370 | i*86 | i860 | i960 | ia16 | ia64 \
 			| ip2k | iq2000 \
 			| k1om \
+			| kvx \
 			| le32 | le64 \
 			| lm32 \
 			| loongarch32 | loongarch64 \
@@ -1214,31 +1215,7 @@ case $cpu-$vendor in
 			| m6811 | m68hc11 | m6812 | m68hc12 | m68hcs12x \
 			| m88110 | m88k | maxq | mb | mcore | mep | metag \
 			| microblaze | microblazeel \
-			| mips | mipsbe | mipseb | mipsel | mipsle \
+			| mips* \
-			| mips16 \
-			| mips64 | mips64eb | mips64el \
-			| mips64octeon | mips64octeonel \
-			| mips64orion | mips64orionel \
-			| mips64r5900 | mips64r5900el \
-			| mips64vr | mips64vrel \
-			| mips64vr4100 | mips64vr4100el \
-			| mips64vr4300 | mips64vr4300el \
-			| mips64vr5000 | mips64vr5000el \
-			| mips64vr5900 | mips64vr5900el \
-			| mipsisa32 | mipsisa32el \
-			| mipsisa32r2 | mipsisa32r2el \
-			| mipsisa32r3 | mipsisa32r3el \
-			| mipsisa32r5 | mipsisa32r5el \
-			| mipsisa32r6 | mipsisa32r6el \
-			| mipsisa64 | mipsisa64el \
-			| mipsisa64r2 | mipsisa64r2el \
-			| mipsisa64r3 | mipsisa64r3el \
-			| mipsisa64r5 | mipsisa64r5el \
-			| mipsisa64r6 | mipsisa64r6el \
-			| mipsisa64sb1 | mipsisa64sb1el \
-			| mipsisa64sr71k | mipsisa64sr71kel \
-			| mipsr5900 | mipsr5900el \
-			| mipstx39 | mipstx39el \
 			| mmix \
 			| mn10200 | mn10300 \
 			| moxie \
@@ -1733,7 +1710,7 @@ case $os in
 	     | hpux* | unos* | osf* | luna* | dgux* | auroraux* | solaris* \
 	     | sym* |  plan9* | psp* | sim* | xray* | os68k* | v88r* \
 	     | hiux* | abug | nacl* | netware* | windows* \
-	     | os9* | macos* | osx* | ios* \
+	     | os9* | macos* | osx* | ios* | tvos* | watchos* \
 	     | mpw* | magic* | mmixware* | mon960* | lnews* \
 	     | amigaos* | amigados* | msdos* | newsos* | unicos* | aof* \
 	     | aos* | aros* | cloudabi* | sortix* | twizzler* \
@@ -1759,7 +1736,7 @@ case $os in
 	     | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
 	     | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
 	     | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx* | zephyr* \
-	     | fiwix* | mlibc* )
+	     | fiwix* | mlibc* | cos* | mbr* )
 		;;
 	# This one is extra strict with allowed versions
 	sco3.2v2 | sco3.2v[4-9]* | sco5v6*)
@@ -1816,6 +1793,10 @@ case $kernel-$os in
 		;;
 	*-eabi* | *-gnueabi*)
 		;;
+	none-coff* | none-elf*)
+		# None (no kernel, i.e. freestanding / bare metal),
+		# can be paired with an output format "OS"
+		;;
 	-*)
 		# Blank kernel with real OS is always fine.
 		;;

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{2023-07-02.10}
+\def\texinfoversion{2023-07-27.21}
 %
 % Copyright 1985, 1986, 1988, 1990-2023 Free Software Foundation, Inc.
 %
@@ -426,42 +426,21 @@
 }
 
 % First remove any @comment, then any @c comment.  Pass the result on to
-% \argcheckspaces.
+% \argremovespace.
 \def\argremovecomment#1\comment#2\ArgTerm{\argremovec #1\c\ArgTerm}
-\def\argremovec#1\c#2\ArgTerm{\argcheckspaces#1\^^M\ArgTerm}
+\def\argremovec#1\c#2\ArgTerm{\argremovespace#1$ $\ArgTerm}
-
+% \argremovec might leave us with trailing space, though; e.g.,
-% Each occurrence of `\^^M' or `<space>\^^M' is replaced by a single space.
-%
-% \argremovec might leave us with trailing space, e.g.,
 %    @end itemize  @c foo
-% This space token undergoes the same procedure and is eventually removed
+% Note that the argument cannot contain the TeX $, as its catcode is
-% by \finishparsearg.
+% changed to \other when Texinfo source is read.
-%
+\def\argremovespace#1 $#2\ArgTerm{\finishparsearg#1$\ArgTerm}
-\def\argcheckspaces#1\^^M{\argcheckspacesX#1\^^M \^^M}
-\def\argcheckspacesX#1 \^^M{\argcheckspacesY#1\^^M}
-\def\argcheckspacesY#1\^^M#2\^^M#3\ArgTerm{%
-  \def\temp{#3}%
-  \ifx\temp\empty
-    % Do not use \next, perhaps the caller of \parsearg uses it; reuse \temp:
-    \let\temp\finishparsearg
-  \else
-    \let\temp\argcheckspaces
-  \fi
-  % Put the space token in:
-  \temp#1 #3\ArgTerm
-}
 
 % If a _delimited_ argument is enclosed in braces, they get stripped; so
 % to get _exactly_ the rest of the line, we had to prevent such situation.
-% We prepended an \empty token at the very beginning and we expand it now,
+% We prepended an \empty token at the very beginning and we expand it
-% just before passing the control to \argtorun.
+% just before passing the control to \next.
-% (Similarly, we have to think about #3 of \argcheckspacesY above: it is
+% (But first, we have to remove the remaining $ or two.)
-% either the null string, or it ends with \^^M---thus there is no danger
+\def\finishparsearg#1$#2\ArgTerm{\expandafter\argtorun\expandafter{#1}}
-% that a pair of braces would be stripped.
-%
-% But first, we have to remove the trailing space token.
-%
-\def\finishparsearg#1 \ArgTerm{\expandafter\argtorun\expandafter{#1}}
 
 
 % \parseargdef - define a command taking an argument on the line
@@ -5575,6 +5554,11 @@ might help (with 'rm \jobname.?? \jobname.??s')%
 \newdimen\entryrightmargin
 \entryrightmargin=0pt
 
+% amount to indent subsequent lines in an entry when it spans more than
+% one line.
+\newdimen\entrycontskip
+\entrycontskip=1em
+
 % for PDF output, whether to make the text of the entry a link to the page
 % number.  set for @contents and @shortcontents where there is only one
 % page number.
@@ -5684,25 +5668,30 @@ might help (with 'rm \jobname.?? \jobname.??s')%
       \advance\dimen@ii by 1\dimen@i
       \ifdim\wd\boxA > \dimen@ii % If the entry doesn't fit in one line
       \ifdim\dimen@ > 0.8\dimen@ii   % due to long index text
+        % Undo changes above
+        \advance \parfillskip by 0pt minus -1\dimen@i
+        \advance\dimen@ii by -1\dimen@i
+        %
         % Try to split the text roughly evenly.  \dimen@ will be the length of
         % the first line.
         \dimen@ = 0.7\dimen@
         \dimen@ii = \hsize
         \ifnum\dimen@>\dimen@ii
           % If the entry is too long (for example, if it needs more than
-          % two lines), use all the space in the first line.
+          % two lines), use the same line length for all lines.
           \dimen@ = \dimen@ii
+        \else
+          \advance \dimen@ by 1\rightskip
         \fi
         \advance\leftskip by 0pt plus 1fill % ragged right
-        \advance \dimen@ by 1\rightskip
         \parshape = 2 0pt \dimen@ 0em \dimen@ii
         % Ideally we'd add a finite glue at the end of the first line only,
         % instead of using \parshape with explicit line lengths, but TeX
         % doesn't seem to provide a way to do such a thing.
         %
         % Indent all lines but the first one.
-        \advance\leftskip by 1em
+        \advance\leftskip by \entrycontskip
-        \advance\parindent by -1em
+        \advance\parindent by -\entrycontskip
       \fi\fi
       \indent % start paragraph
       \unhbox\boxA
@@ -6721,6 +6710,82 @@ might help (with 'rm \jobname.?? \jobname.??s')%
   \input \tocreadfilename
 }
 
+% process toc file to find the maximum width of the section numbers for
+% each chapter
+\def\findsecnowidths{%
+  \begingroup
+  \setupdatafile
+  \activecatcodes
+  \secentryfonts
+  % Redefinitions
+  \def\numchapentry##1##2##3##4{%
+    \def\curchapname{secnowidth-##2}%
+    \curchapmax=0pt
+  }%
+  \let\appentry\numchapentry
+  %
+  \def\numsecentry##1##2##3##4{%
+    \def\cursecname{secnowidth-##2}%
+    \cursecmax=0pt
+    %
+    \setbox0=\hbox{##2}%
+    \ifdim\wd0>\curchapmax
+      \curchapmax=\wd0
+      \expandafter\xdef\csname\curchapname\endcsname{\the\wd0}%
+    \fi
+  }%
+  \let\appsecentry\numsecentry
+  %
+  \def\numsubsecentry##1##2##3##4{%
+    \def\curssecname{secnowidth-##2}%
+    \curssecmax=0pt
+    %
+    \setbox0=\hbox{##2}%
+    \ifdim\wd0>\cursecmax
+      \cursecmax=\wd0
+      \expandafter\xdef\csname\cursecname\endcsname{\the\wd0}%
+    \fi
+  }%
+  \let\appsubsecentry\numsubsecentry
+  %
+  \def\numsubsubsecentry##1##2##3##4{%
+    \setbox0=\hbox{##2}%
+    \ifdim\wd0>\curssecmax
+      \curssecmax=\wd0
+      \expandafter\xdef\csname\curssecname\endcsname{\the\wd0}%
+    \fi
+  }%
+  \let\appsubsubsecentry\numsubsubsecentry
+  %
+  % Discard any output by outputting to dummy vbox, in case the toc file
+  % contains macros that we have not redefined above.
+  \setbox\dummybox\vbox\bgroup
+    \input \tocreadfilename\relax
+  \egroup
+  \endgroup
+}
+\newdimen\curchapmax
+\newdimen\cursecmax
+\newdimen\curssecmax
+
+
+% set #1 to the maximum section width for #2
+\def\retrievesecnowidth#1#2{%
+  \expandafter\let\expandafter\savedsecnowidth \csname secnowidth-#2\endcsname
+  \ifx\savedsecnowidth\relax
+    #1=0pt
+  \else
+    #1=\savedsecnowidth
+  \fi
+}
+\newdimen\secnowidthchap
+\secnowidthchap=0pt
+\newdimen\secnowidthsec
+\secnowidthsec=0pt
+\newdimen\secnowidthssec
+\secnowidthssec=0pt
+
+
 \newskip\contentsrightmargin \contentsrightmargin=1in
 \newcount\savepageno
 \newcount\lastnegativepageno \lastnegativepageno = -1
@@ -6766,6 +6831,7 @@ might help (with 'rm \jobname.?? \jobname.??s')%
   \startcontents{\putwordTOC}%
     \openin 1 \tocreadfilename\space
     \ifeof 1 \else
+      \findsecnowidths
       \readtocfile
     \fi
     \vfill \eject
@@ -6793,6 +6859,7 @@ might help (with 'rm \jobname.?? \jobname.??s')%
     \rm
     \hyphenpenalty = 10000
     \advance\baselineskip by 1pt % Open it up a little.
+    \extrasecnoskip=0.4pt
     \def\numsecentry##1##2##3##4{}
     \let\appsecentry = \numsecentry
     \let\unnsecentry = \numsecentry
@@ -6828,8 +6895,6 @@ might help (with 'rm \jobname.?? \jobname.??s')%
   % This space should be enough, since a single number is .5em, and the
   % widest letter (M) is 1em, at least in the Computer Modern fonts.
   % But use \hss just in case.
-  % (This space doesn't include the extra space that gets added after
-  % the label; that gets put in by \shortchapentry above.)
   %
   % We'd like to right-justify chapter numbers, but that looks strange
   % with appendix letters.  And right-justifying numbers and
@@ -6839,10 +6904,15 @@ might help (with 'rm \jobname.?? \jobname.??s')%
   \hbox to 1em{#1\hss}%
 }
 
-% These macros generate individual entries in the table of contents.
+% These macros generate individual entries in the table of contents,
-% The first argument is the chapter or section name.
+% and are read in from the *.toc file.
-% The last argument is the page number.
+%
-% The arguments in between are the chapter number, section number, ...
+% The arguments are like:
+% \def\numchapentry#1#2#3#4
+%   #1 - the chapter or section name.
+%   #2 - section number
+%   #3 - level of section (e.g "chap", "sec")
+%   #4 - page number
 
 % Parts, in the main contents.  Replace the part number, which doesn't
 % exist, with an empty box.  Let's hope all the numbers have the same width.
@@ -6855,7 +6925,7 @@ might help (with 'rm \jobname.?? \jobname.??s')%
   \vskip 0pt plus 5\baselineskip
   \penalty-300
   \vskip 0pt plus -5\baselineskip
-  \dochapentry{\numeralbox\labelspace#1}{}%
+  \dochapentry{#1}{\numeralbox}{}%
 }
 %
 % Parts, in the short toc.
@@ -6866,12 +6936,14 @@ might help (with 'rm \jobname.?? \jobname.??s')%
 }
 
 % Chapters, in the main contents.
-\def\numchapentry#1#2#3#4{\dochapentry{#2\labelspace#1}{#4}}
+\def\numchapentry#1#2#3#4{%
+  \retrievesecnowidth\secnowidthchap{#2}%
+  \dochapentry{#1}{#2}{#4}%
+}
 
 % Chapters, in the short toc.
-% See comments in \dochapentry re vbox and related settings.
 \def\shortchapentry#1#2#3#4{%
-  \tocentry{\shortchaplabel{#2}\labelspace #1}{#4}%
+  \tocentry{#1}{\shortchaplabel{#2}}{#4}%
 }
 
 % Appendices, in the main contents.
@@ -6882,67 +6954,111 @@ might help (with 'rm \jobname.?? \jobname.??s')%
   \setbox0 = \hbox{\putwordAppendix{} M}%
   \hbox to \wd0{\putwordAppendix{} #1\hss}}
 %
-\def\appentry#1#2#3#4{\dochapentry{\appendixbox{#2}\hskip.7em#1}{#4}}
+\def\appentry#1#2#3#4{%
+  \retrievesecnowidth\secnowidthchap{#2}%
+  \dochapentry{\appendixbox{#2}\hskip.7em#1}{}{#4}%
+}
 
 % Unnumbered chapters.
-\def\unnchapentry#1#2#3#4{\dochapentry{#1}{#4}}
+\def\unnchapentry#1#2#3#4{\dochapentry{#1}{}{#4}}
-\def\shortunnchapentry#1#2#3#4{\tocentry{#1}{#4}}
+\def\shortunnchapentry#1#2#3#4{\tocentry{#1}{}{#4}}
 
 % Sections.
-\def\numsecentry#1#2#3#4{\dosecentry{#2\labelspace#1}{#4}}
+\def\numsecentry#1#2#3#4{\dosecentry{#1}{#2}{#4}}
+
+\def\numsecentry#1#2#3#4{%
+  \retrievesecnowidth\secnowidthsec{#2}%
+  \dosecentry{#1}{#2}{#4}%
+}
 \let\appsecentry=\numsecentry
-\def\unnsecentry#1#2#3#4{\dosecentry{#1}{#4}}
+\def\unnsecentry#1#2#3#4{%
+  \retrievesecnowidth\secnowidthsec{#2}%
+  \dosecentry{#1}{}{#4}%
+}
 
 % Subsections.
-\def\numsubsecentry#1#2#3#4{\dosubsecentry{#2\labelspace#1}{#4}}
+\def\numsubsecentry#1#2#3#4{%
+  \retrievesecnowidth\secnowidthssec{#2}%
+  \dosubsecentry{#1}{#2}{#4}%
+}
 \let\appsubsecentry=\numsubsecentry
-\def\unnsubsecentry#1#2#3#4{\dosubsecentry{#1}{#4}}
+\def\unnsubsecentry#1#2#3#4{%
+  \retrievesecnowidth\secnowidthssec{#2}%
+  \dosubsecentry{#1}{}{#4}%
+}
 
 % And subsubsections.
-\def\numsubsubsecentry#1#2#3#4{\dosubsubsecentry{#2\labelspace#1}{#4}}
+\def\numsubsubsecentry#1#2#3#4{\dosubsubsecentry{#1}{#2}{#4}}
 \let\appsubsubsecentry=\numsubsubsecentry
-\def\unnsubsubsecentry#1#2#3#4{\dosubsubsecentry{#1}{#4}}
+\def\unnsubsubsecentry#1#2#3#4{\dosubsubsecentry{#1}{}{#4}}
 
 % This parameter controls the indentation of the various levels.
 % Same as \defaultparindent.
 \newdimen\tocindent \tocindent = 15pt
 
-% Now for the actual typesetting. In all these, #1 is the text and #2 is the
+% Now for the actual typesetting. In all these, #1 is the text, #2 is
-% page number.
+% a section number if present, and #3 is the page number.
 %
 % If the toc has to be broken over pages, we want it to be at chapters
 % if at all possible; hence the \penalty.
-\def\dochapentry#1#2{%
+\def\dochapentry#1#2#3{%
    \penalty-300 \vskip1\baselineskip plus.33\baselineskip minus.25\baselineskip
    \begingroup
      % Move the page numbers slightly to the right
      \advance\entryrightmargin by -0.05em
      \chapentryfonts
-     \tocentry{#1}{#2}%
+     \extrasecnoskip=0.4em % separate chapter number more
+     \tocentry{#1}{#2}{#3}%
    \endgroup
    \nobreak\vskip .25\baselineskip plus.1\baselineskip
 }
 
-\def\dosecentry#1#2{\begingroup
+\def\dosecentry#1#2#3{\begingroup
+  \secnowidth=\secnowidthchap
   \secentryfonts \leftskip=\tocindent
-  \tocentry{#1}{#2}%
+  \tocentry{#1}{#2}{#3}%
 \endgroup}
 
-\def\dosubsecentry#1#2{\begingroup
+\def\dosubsecentry#1#2#3{\begingroup
+  \secnowidth=\secnowidthsec
   \subsecentryfonts \leftskip=2\tocindent
-  \tocentry{#1}{#2}%
+  \tocentry{#1}{#2}{#3}%
 \endgroup}
 
-\def\dosubsubsecentry#1#2{\begingroup
+\def\dosubsubsecentry#1#2#3{\begingroup
+  \secnowidth=\secnowidthssec
   \subsubsecentryfonts \leftskip=3\tocindent
-  \tocentry{#1}{#2}%
+  \tocentry{#1}{#2}{#3}%
 \endgroup}
 
-% We use the same \entry macro as for the index entries.
+% Used for the maximum width of a section number so we can align
-\let\tocentry = \entry
+% section titles.
+\newdimen\secnowidth
+\secnowidth=0pt
+\newdimen\extrasecnoskip
+\extrasecnoskip=0pt
 
-% Space between chapter (or whatever) number and the title.
+% \tocentry{TITLE}{SEC NO}{PAGE}
-\def\labelspace{\hskip1em \relax}
+%
+\def\tocentry#1#2#3{%
+  \def\secno{#2}%
+  \ifx\empty\secno
+    \entry{#1}{#3}%
+  \else
+    \ifdim 0pt=\secnowidth
+      \setbox0=\hbox{#2\hskip\labelspace\hskip\extrasecnoskip}%
+    \else
+      \advance\secnowidth by \labelspace
+      \advance\secnowidth by \extrasecnoskip
+      \setbox0=\hbox to \secnowidth{%
+        #2\hskip\labelspace\hskip\extrasecnoskip\hfill}%
+    \fi
+    \entrycontskip=\wd0
+    \entry{\box0 #1}{#3}%
+  \fi
+}
+\newdimen\labelspace
+\labelspace=0.6em
 
 \def\chapentryfonts{\secfonts \rm}
 \def\secentryfonts{\textfonts}
@@ -7787,6 +7903,8 @@ might help (with 'rm \jobname.?? \jobname.??s')%
   \tolerance=10000 \hbadness=10000
   \exdentamount=\defbodyindent
   {%
+    \def\^^M{}% for line continuation
+    %
     % defun fonts. We use typewriter by default (used to be bold) because:
     % . we're printing identifiers, they should be in tt in principle.
     % . in languages with many accents, such as Czech or French, it's
@@ -7819,6 +7937,7 @@ might help (with 'rm \jobname.?? \jobname.??s')%
 % Print arguments.  Use slanted for @def*, typewriter for @deftype*.
 \def\defunargs#1{%
   \bgroup
+    \def\^^M{}% for line continuation
     \df \ifdoingtypefn \tt \else \sl \fi
     \ifflagclear{txicodevaristt}{}%
        {\def\var##1{{\setregularquotes \ttsl ##1}}}%

lib/diffseq.h

@@ -92,20 +92,11 @@
 # define NOTE_ORDERED false
 #endif
 
-/* Use this to suppress gcc's "...may be used before initialized" warnings.
+/* Suppress gcc's "...may be used before initialized" warnings,
-   Beware: The Code argument must not contain commas.  */
+   generated by GCC versions up to at least GCC 13.2.  */
 #if __GNUC__ + (__GNUC_MINOR__ >= 7) > 4
 # pragma GCC diagnostic push
-#endif
+# pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
-#ifndef IF_LINT
-# if defined GCC_LINT || defined lint
-#  define IF_LINT(Code) Code
-# else
-#  define IF_LINT(Code) /* empty */
-#  if __GNUC__ + (__GNUC_MINOR__ >= 7) > 4
-#   pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
-#  endif
-# endif
 #endif
 
 /*
@@ -388,13 +379,8 @@ diag (OFFSET xoff, OFFSET xlim, OFFSET yoff, OFFSET ylim, bool find_minimal,
          and report halfway between our best results so far.  */
       if (c >= ctxt->too_expensive)
         {
-          OFFSET fxybest;
-          OFFSET fxbest IF_LINT (= 0);
-          OFFSET bxybest;
-          OFFSET bxbest IF_LINT (= 0);
-
           /* Find forward diagonal that maximizes X + Y.  */
-          fxybest = -1;
+          OFFSET fxybest = -1, fxbest;
           for (d = fmax; d >= fmin; d -= 2)
             {
               OFFSET x = MIN (fd[d], xlim);
@@ -412,7 +398,7 @@ diag (OFFSET xoff, OFFSET xlim, OFFSET yoff, OFFSET ylim, bool find_minimal,
             }
 
           /* Find backward diagonal that minimizes X + Y.  */
-          bxybest = OFFSET_MAX;
+          OFFSET bxybest = OFFSET_MAX, bxbest;
           for (d = bmax; d >= bmin; d -= 2)
             {
               OFFSET x = MAX (xoff, bd[d]);

lib/gnulib.mk.in

@@ -41,6 +41,10 @@
 #  --avoid=dup \
 #  --avoid=fchdir \
 #  --avoid=fstat \
+#  --avoid=iswblank \
+#  --avoid=iswctype \
+#  --avoid=iswdigit \
+#  --avoid=iswxdigit \
 #  --avoid=langinfo \
 #  --avoid=lock \
 #  --avoid=mbrtowc \
@@ -67,6 +71,7 @@
 #  --avoid=utime-h \
 #  --avoid=wchar \
 #  --avoid=wcrtomb \
+#  --avoid=wctype \
 #  --avoid=wctype-h \
 #  alignasof \
 #  alloca-opt \
@@ -658,7 +663,6 @@ GL_GNULIB__EXIT = @GL_GNULIB__EXIT@
 GMALLOC_OBJ = @GMALLOC_OBJ@
 GMP_H = @GMP_H@
 GNULIBHEADERS_OVERRIDE_WINT_T = @GNULIBHEADERS_OVERRIDE_WINT_T@
-GNULIB_GETTIMEOFDAY = @GNULIB_GETTIMEOFDAY@
 GNULIB_WARN_CFLAGS = @GNULIB_WARN_CFLAGS@
 GNUSTEP_CFLAGS = @GNUSTEP_CFLAGS@
 GNU_OBJC_CFLAGS = @GNU_OBJC_CFLAGS@

lib/time.in.h

@@ -143,6 +143,12 @@ _GL_CXXALIAS_SYS (timespec_get, int, (struct timespec *ts, int base));
 #  if __GLIBC__ >= 2
 _GL_CXXALIASWARN (timespec_get);
 #  endif
+# elif defined GNULIB_POSIXCHECK
+#  undef timespec_get
+#  if HAVE_RAW_DECL_TIMESPEC_GET
+_GL_WARN_ON_USE (timespec_get, "timespec_get is unportable - "
+                 "use gnulib module timespec_get for portability");
+#  endif
 # endif
 
 /* Set *TS to the current time resolution, and return BASE.
@@ -154,6 +160,12 @@ _GL_FUNCDECL_SYS (timespec_getres, int, (struct timespec *ts, int base)
 #  endif
 _GL_CXXALIAS_SYS (timespec_getres, int, (struct timespec *ts, int base));
 _GL_CXXALIASWARN (timespec_getres);
+# elif defined GNULIB_POSIXCHECK
+#  undef timespec_getres
+#  if HAVE_RAW_DECL_TIMESPEC_GETRES
+_GL_WARN_ON_USE (timespec_getres, "timespec_getres is unportable - "
+                 "use gnulib module timespec_getres for portability");
+#  endif
 # endif
 
 /* Return the number of seconds that have elapsed since the Epoch.  */
@@ -170,6 +182,12 @@ _GL_CXXALIAS_SYS (time, time_t, (time_t *__tp));
 #  if __GLIBC__ >= 2
 _GL_CXXALIASWARN (time);
 #  endif
+# elif defined GNULIB_POSIXCHECK
+#  undef time
+#  if HAVE_RAW_DECL_TIME
+_GL_WARN_ON_USE (time, "time has consistency problems - "
+                 "use gnulib module time for portability");
+#  endif
 # endif
 
 /* Sleep for at least RQTP seconds unless interrupted,  If interrupted,
@@ -195,6 +213,12 @@ _GL_CXXALIAS_SYS (nanosleep, int,
                   (struct timespec const *__rqtp, struct timespec *__rmtp));
 #  endif
 _GL_CXXALIASWARN (nanosleep);
+# elif defined GNULIB_POSIXCHECK
+#  undef nanosleep
+#  if HAVE_RAW_DECL_NANOSLEEP
+_GL_WARN_ON_USE (nanosleep, "nanosleep is unportable - "
+                 "use gnulib module nanosleep for portability");
+#  endif
 # endif
 
 /* Initialize time conversion information.  */
@@ -230,6 +254,12 @@ _GL_CXXALIAS_MDA (tzset, void, (void));
 _GL_CXXALIAS_SYS (tzset, void, (void));
 #  endif
 _GL_CXXALIASWARN (tzset);
+# elif defined GNULIB_POSIXCHECK
+#  undef tzset
+#  if HAVE_RAW_DECL_TZSET
+_GL_WARN_ON_USE (tzset, "tzset has portability problems - "
+                 "use gnulib module tzset for portability");
+#  endif
 # endif
 
 /* Return the 'time_t' representation of TP and normalize TP.  */
@@ -246,6 +276,12 @@ _GL_CXXALIAS_SYS (mktime, time_t, (struct tm *__tp));
 #  if __GLIBC__ >= 2
 _GL_CXXALIASWARN (mktime);
 #  endif
+# elif defined GNULIB_POSIXCHECK
+#  undef mktime
+#  if HAVE_RAW_DECL_MKTIME
+_GL_WARN_ON_USE (mktime, "mktime has portability problems - "
+                 "use gnulib module mktime for portability");
+#  endif
 # endif
 
 /* Convert TIMER to RESULT, assuming local time and UTC respectively.  See
@@ -296,6 +332,17 @@ _GL_CXXALIAS_SYS (gmtime_r, struct tm *, (time_t const *restrict __timer,
 #  if @HAVE_DECL_LOCALTIME_R@
 _GL_CXXALIASWARN (gmtime_r);
 #  endif
+# elif defined GNULIB_POSIXCHECK
+#  undef localtime_r
+#  if HAVE_RAW_DECL_LOCALTIME_R
+_GL_WARN_ON_USE (localtime_r, "localtime_r is unportable - "
+                 "use gnulib module time_r for portability");
+#  endif
+#  undef gmtime_r
+#  if HAVE_RAW_DECL_GMTIME_R
+_GL_WARN_ON_USE (gmtime_r, "gmtime_r is unportable - "
+                 "use gnulib module time_r for portability");
+#  endif
 # endif
 
 /* Convert TIMER to RESULT, assuming local time and UTC respectively.  See
@@ -316,6 +363,12 @@ _GL_CXXALIAS_SYS (localtime, struct tm *, (time_t const *__timer));
 #  if __GLIBC__ >= 2
 _GL_CXXALIASWARN (localtime);
 #  endif
+# elif defined GNULIB_POSIXCHECK
+#  undef localtime
+#  if HAVE_RAW_DECL_LOCALTIME
+_GL_WARN_ON_USE (localtime, "localtime has portability problems - "
+                 "use gnulib module localtime for portability");
+#  endif
 # endif
 
 # if 0 || @REPLACE_GMTIME@
@@ -347,6 +400,12 @@ _GL_CXXALIAS_SYS (strptime, char *, (char const *restrict __buf,
                                      char const *restrict __format,
                                      struct tm *restrict __tm));
 _GL_CXXALIASWARN (strptime);
+# elif defined GNULIB_POSIXCHECK
+#  undef strptime
+#  if HAVE_RAW_DECL_STRPTIME
+_GL_WARN_ON_USE (strptime, "strptime is unportable - "
+                 "use gnulib module strptime for portability");
+#  endif
 # endif
 
 /* Convert *TP to a date and time string.  See
@@ -368,6 +427,12 @@ _GL_CXXALIAS_SYS (ctime, char *, (time_t const *__tp));
 #  if __GLIBC__ >= 2
 _GL_CXXALIASWARN (ctime);
 #  endif
+# elif defined GNULIB_POSIXCHECK
+#  undef ctime
+#  if HAVE_RAW_DECL_CTIME
+_GL_WARN_ON_USE (ctime, "ctime has portability problems - "
+                 "use gnulib module ctime for portability");
+#  endif
 # endif
 
 /* Convert *TP to a date and time string.  See
@@ -392,6 +457,12 @@ _GL_CXXALIAS_SYS (strftime, size_t,
 #  if __GLIBC__ >= 2
 _GL_CXXALIASWARN (strftime);
 #  endif
+# elif defined GNULIB_POSIXCHECK
+#  undef strftime
+#  if HAVE_RAW_DECL_STRFTIME
+_GL_WARN_ON_USE (strftime, "strftime has portability problems - "
+                 "use gnulib module strftime-fixes for portability");
+#  endif
 # endif
 
 # if defined _GNU_SOURCE && @GNULIB_TIME_RZ@ && ! @HAVE_TIMEZONE_T@
@@ -469,6 +540,12 @@ _GL_CXXALIAS_SYS (timegm, time_t, (struct tm *__tm));
 #  if __GLIBC__ >= 2
 _GL_CXXALIASWARN (timegm);
 #  endif
+# elif defined GNULIB_POSIXCHECK
+#  undef timegm
+#  if HAVE_RAW_DECL_TIMEGM
+_GL_WARN_ON_USE (timegm, "timegm is unportable - "
+                 "use gnulib module timegm for portability");
+#  endif
 # endif
 
 /* Encourage applications to avoid unsafe functions that can overrun
@@ -476,8 +553,10 @@ _GL_CXXALIASWARN (timegm);
    applications should use strftime (or even sprintf) instead.  */
 # if defined GNULIB_POSIXCHECK
 #  undef asctime
+#  if HAVE_RAW_DECL_ASCTIME
 _GL_WARN_ON_USE (asctime, "asctime can overrun buffers in some cases - "
                  "better use strftime (or even sprintf) instead");
+#  endif
 # endif
 # if defined GNULIB_POSIXCHECK
 #  undef asctime_r
@@ -488,8 +567,10 @@ _GL_WARN_ON_USE (asctime_r, "asctime_r can overrun buffers in some cases - "
 # endif
 # if defined GNULIB_POSIXCHECK
 #  undef ctime
+#  if HAVE_RAW_DECL_CTIME
 _GL_WARN_ON_USE (ctime, "ctime can overrun buffers in some cases - "
                  "better use strftime (or even sprintf) instead");
+#  endif
 # endif
 # if defined GNULIB_POSIXCHECK
 #  undef ctime_r

m4/clock_time.m4

@@ -1,4 +1,4 @@
-# clock_time.m4 serial 12
+# clock_time.m4 serial 13
 dnl Copyright (C) 2002-2006, 2009-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -12,9 +12,17 @@ dnl with or without modifications, as long as this notice is preserved.
 
 AC_DEFUN([gl_CLOCK_TIME],
 [
+  AC_REQUIRE([AC_CANONICAL_HOST])
+
   dnl Persuade glibc and Solaris <time.h> to declare these functions.
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
 
+  # On mingw, these functions are defined in the libwinpthread library,
+  # which is better avoided.  In fact, the clock_gettime function is buggy
+  # in 32-bit mingw, when -D__MINGW_USE_VC2005_COMPAT is used (which Gnulib's
+  # year2038 module does): It leaves the upper 32 bits of the tv_sec field
+  # of the result uninitialized.
+
   # Solaris 2.5.1 needs -lposix4 to get the clock_gettime function.
   # Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.
 
@@ -23,12 +31,22 @@ AC_DEFUN([gl_CLOCK_TIME],
   # library, inducing unnecessary run-time overhead.
   CLOCK_TIME_LIB=
   AC_SUBST([CLOCK_TIME_LIB])
-  gl_saved_libs=$LIBS
+  case "$host_os" in
-    AC_SEARCH_LIBS([clock_gettime], [rt posix4],
+    mingw*)
-                   [test "$ac_cv_search_clock_gettime" = "none required" ||
+      ac_cv_func_clock_getres=no
-                    CLOCK_TIME_LIB=$ac_cv_search_clock_gettime])
+      ac_cv_func_clock_gettime=no
-    AC_CHECK_FUNCS([clock_getres clock_gettime clock_settime])
+      ac_cv_func_clock_settime=no
-  LIBS=$gl_saved_libs
+      ;;
+    *)
+      gl_saved_libs=$LIBS
+        AC_SEARCH_LIBS([clock_gettime], [rt posix4],
+                       [test "$ac_cv_search_clock_gettime" = "none required" ||
+                        CLOCK_TIME_LIB=$ac_cv_search_clock_gettime])
+        AC_CHECK_FUNCS([clock_getres clock_gettime clock_settime])
+      LIBS=$gl_saved_libs
+      ;;
+  esac
+
   # For backward compatibility.
   LIB_CLOCK_GETTIME="$CLOCK_TIME_LIB"
   AC_SUBST([LIB_CLOCK_GETTIME])

m4/mktime.m4

@@ -1,4 +1,4 @@
-# serial 37
+# serial 38
 dnl Copyright (C) 2002-2003, 2005-2007, 2009-2023 Free Software Foundation,
 dnl Inc.
 dnl This file is free software; the Free Software Foundation
@@ -280,7 +280,6 @@ AC_DEFUN([gl_FUNC_MKTIME],
   AC_REQUIRE([AC_CANONICAL_HOST])
   AC_REQUIRE([gl_FUNC_MKTIME_WORKS])
 
-  REPLACE_MKTIME=0
   if test "$gl_cv_func_working_mktime" != yes; then
     REPLACE_MKTIME=1
     AC_DEFINE([NEED_MKTIME_WORKING], [1],

m4/nanosleep.m4

@@ -1,4 +1,4 @@
-# serial 43
+# serial 44
 
 dnl From Jim Meyering.
 dnl Check for the nanosleep function.
@@ -126,9 +126,7 @@ AC_DEFUN([gl_FUNC_NANOSLEEP],
        ])
     ])
    case "$gl_cv_func_nanosleep" in
-     *yes)
+     *yes) ;;
-       REPLACE_NANOSLEEP=0
-       ;;
      *)
        REPLACE_NANOSLEEP=1
        case "$gl_cv_func_nanosleep" in

m4/stdalign.m4

@@ -68,8 +68,10 @@ AC_DEFUN([gl_ALIGNASOF],
   dnl The "zz" puts this toward config.h's end, to avoid potential
   dnl collisions with other definitions.
   AH_VERBATIM([zzalignas],
-[#if !defined HAVE_C_ALIGNASOF && __cplusplus < 201103 && !defined alignof
+[#if !defined HAVE_C_ALIGNASOF \
-# if HAVE_STDALIGN_H
+    && !(defined __cplusplus && 201103 <= __cplusplus) \
+    && !defined alignof
+# if defined HAVE_STDALIGN_H
 #  include <stdalign.h>
 # endif
 
@@ -166,7 +168,7 @@ AC_DEFUN([gl_ALIGNASOF],
 #   define _Alignas(a) __declspec (align (a))
 #  endif
 # endif
-# if !HAVE_STDALIGN_H
+# if !defined HAVE_STDALIGN_H
 #  if ((defined _Alignas \
         && !(defined __cplusplus \
              && (201103 <= __cplusplus || defined _MSC_VER))) \
@@ -175,7 +177,7 @@ AC_DEFUN([gl_ALIGNASOF],
 #  endif
 # endif
 
-# if _GL_STDALIGN_NEEDS_STDDEF
+# if defined _GL_STDALIGN_NEEDS_STDDEF
 #  include <stddef.h>
 # endif
 #endif])

m4/time_h.m4

@@ -2,7 +2,7 @@
 
 # Copyright (C) 2000-2001, 2003-2007, 2009-2023 Free Software Foundation, Inc.
 
-# serial 22
+# serial 24
 
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -23,7 +23,10 @@ AC_DEFUN_ONCE([gl_TIME_H],
   dnl corresponding gnulib module is not in use.
   gl_WARN_ON_USE_PREPARE([[
 #include <time.h>
-    ]], [asctime_r ctime_r])
+    ]], [
+      asctime asctime_r ctime ctime_r gmtime_r localtime localtime_r mktime
+      nanosleep strftime strptime time timegm timespec_get timespec_getres tzset
+    ])
 
   AC_REQUIRE([AC_C_RESTRICT])
 
@@ -162,25 +165,15 @@ AC_DEFUN([gl_TIME_H_DEFAULTS],
   HAVE_TIMESPEC_GETRES=1;                AC_SUBST([HAVE_TIMESPEC_GETRES])
   dnl Even GNU libc does not have timezone_t yet.
   HAVE_TIMEZONE_T=0;                     AC_SUBST([HAVE_TIMEZONE_T])
-  dnl If another module says to replace or to not replace, do that.
+  REPLACE_CTIME=0;                       AC_SUBST([REPLACE_CTIME])
-  dnl Otherwise, replace only if someone compiles with -DGNULIB_PORTCHECK;
-  dnl this lets maintainers check for portability.
-  REPLACE_CTIME=GNULIB_PORTCHECK;        AC_SUBST([REPLACE_CTIME])
-  REPLACE_LOCALTIME_R=GNULIB_PORTCHECK;  AC_SUBST([REPLACE_LOCALTIME_R])
-  REPLACE_MKTIME=GNULIB_PORTCHECK;       AC_SUBST([REPLACE_MKTIME])
-  REPLACE_NANOSLEEP=GNULIB_PORTCHECK;    AC_SUBST([REPLACE_NANOSLEEP])
-  REPLACE_STRFTIME=GNULIB_PORTCHECK;     AC_SUBST([REPLACE_STRFTIME])
-  REPLACE_TIME=0;                        AC_SUBST([REPLACE_TIME])
-  REPLACE_TIMEGM=GNULIB_PORTCHECK;       AC_SUBST([REPLACE_TIMEGM])
-  REPLACE_TIMESPEC_GET=GNULIB_PORTCHECK; AC_SUBST([REPLACE_TIMESPEC_GET])
-  REPLACE_TZSET=GNULIB_PORTCHECK;        AC_SUBST([REPLACE_TZSET])
-
-  dnl Hack so that the time module doesn't depend on the sys_time module.
-  dnl First, default GNULIB_GETTIMEOFDAY to 0 if sys_time is absent.
-  : ${GNULIB_GETTIMEOFDAY=0};            AC_SUBST([GNULIB_GETTIMEOFDAY])
-  dnl Second, it's OK to not use GNULIB_PORTCHECK for REPLACE_GMTIME
-  dnl and REPLACE_LOCALTIME, as portability to Solaris 2.6 and earlier
-  dnl is no longer a big deal.
   REPLACE_GMTIME=0;                      AC_SUBST([REPLACE_GMTIME])
   REPLACE_LOCALTIME=0;                   AC_SUBST([REPLACE_LOCALTIME])
+  REPLACE_LOCALTIME_R=0;                 AC_SUBST([REPLACE_LOCALTIME_R])
+  REPLACE_MKTIME=0;                      AC_SUBST([REPLACE_MKTIME])
+  REPLACE_NANOSLEEP=0;                   AC_SUBST([REPLACE_NANOSLEEP])
+  REPLACE_STRFTIME=0;                    AC_SUBST([REPLACE_STRFTIME])
+  REPLACE_TIME=0;                        AC_SUBST([REPLACE_TIME])
+  REPLACE_TIMEGM=0;                      AC_SUBST([REPLACE_TIMEGM])
+  REPLACE_TIMESPEC_GET=0;                AC_SUBST([REPLACE_TIMESPEC_GET])
+  REPLACE_TZSET=0;                       AC_SUBST([REPLACE_TZSET])
 ])

m4/time_r.m4

@@ -57,9 +57,7 @@ AC_DEFUN([gl_TIME_R],
          [gl_cv_time_r_posix=yes],
          [gl_cv_time_r_posix=no])
       ])
-    if test $gl_cv_time_r_posix = yes; then
+    if test $gl_cv_time_r_posix != yes; then
-      REPLACE_LOCALTIME_R=0
-    else
       REPLACE_LOCALTIME_R=1
     fi
   else

m4/timegm.m4

@@ -1,4 +1,4 @@
-# timegm.m4 serial 15
+# timegm.m4 serial 16
 dnl Copyright (C) 2003, 2007, 2009-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -8,7 +8,6 @@ AC_DEFUN([gl_FUNC_TIMEGM],
 [
   AC_REQUIRE([gl_TIME_H_DEFAULTS])
   AC_REQUIRE([gl_FUNC_MKTIME_WORKS])
-  REPLACE_TIMEGM=0
   gl_CHECK_FUNCS_ANDROID([timegm], [[#include <time.h>]])
   if test $ac_cv_func_timegm = yes; then
     if test "$gl_cv_func_working_mktime" != yes; then

src/Makefile.in

@@ -167,7 +167,7 @@ CLOCK_TIME_LIB=@CLOCK_TIME_LIB@
 EUIDACCESS_LIBGEN=@EUIDACCESS_LIBGEN@
 NANOSLEEP_LIB=@NANOSLEEP_LIB@
 QCOPY_ACL_LIB=@QCOPY_ACL_LIB@
-LIB_TIMER_TIME=@LIB_TIMER_TIME@
+TIMER_TIME_LIB=@TIMER_TIME_LIB@
 
 DBUS_CFLAGS = @DBUS_CFLAGS@
 DBUS_LIBS = @DBUS_LIBS@
@@ -596,7 +596,7 @@ LIBES = $(LIBS) $(W32_LIBS) $(LIBS_GNUSTEP) $(PGTK_LIBS) $(LIBX_BASE) $(LIBIMAGE
    $(LIBX_OTHER) $(LIBSOUND) \
    $(RSVG_LIBS) $(IMAGEMAGICK_LIBS) $(LIB_ACL) $(CLOCK_TIME_LIB) \
    $(NANOSLEEP_LIB) $(QCOPY_ACL_LIB) $(WEBKIT_LIBS) \
-   $(EUIDACCESS_LIBGEN) $(LIB_TIMER_TIME) $(DBUS_LIBS) \
+   $(EUIDACCESS_LIBGEN) $(TIMER_TIME_LIB) $(DBUS_LIBS) \
    $(LIB_EXECINFO) $(XRANDR_LIBS) $(XINERAMA_LIBS) $(XFIXES_LIBS) \
    $(XDBE_LIBS) $(XSYNC_LIBS) \
    $(LIBXML2_LIBS) $(LIBGPM) $(LIBS_SYSTEM) $(CAIRO_LIBS) \