Sync with gnulib

This incorporates:
2016-03-22 gitlog-to-changelog: suppress ignored chatter
2016-03-21 sys_select: port to new Cygwin
* build-aux/gitlog-to-changelog, doc/misc/texinfo.tex:
* lib/sys_select.in.h: Copy from gnulib.

3 files changed, 98 insertions, 64 deletions

diff --git a/build-aux/gitlog-to-changelog b/build-aux/gitlog-to-changelog
index a2513d0efc7..83bafdffa6f 100755
--- a/build-aux/gitlog-to-changelog
+++ b/build-aux/gitlog-to-changelog
@@ -3,7 +3,7 @@ eval '(exit $?0)' && eval 'exec perl -wS "$0" "$@"'
     if 0;
 # Convert git log output to ChangeLog format.
 
-my $VERSION = '2016-01-12 23:09'; # UTC
+my $VERSION = '2016-03-22 21:49'; # UTC
 # The definition above must lie within the first 8 lines in order
 # for the Emacs time-stamp write hook (at end) to update it.
 # If you change this file with Emacs, please let the write hook
@@ -298,9 +298,7 @@ sub git_dir_option($)
             {
               if ($sha =~ /^$_/)
                 {
-                  $skipflag = 1;
-                  ## Perhaps only warn if a pattern matches more than once?
-                  warn "$ME: warning: skipping $sha due to $_\n";
+                  $skipflag = $_;
                   last;
                 }
             }
@@ -386,8 +384,17 @@ sub git_dir_option($)
       }
 
       # Ignore commits that match the --ignore-matching pattern, if specified.
-      if (! ($skipflag || (defined $ignore_matching
-             && @line && $line[0] =~ /$ignore_matching/)))
+      if (defined $ignore_matching && @line && $line[0] =~ /$ignore_matching/)
+        {
+          $skipflag = 1;
+        }
+      elsif ($skipflag)
+        {
+          ## Perhaps only warn if a pattern matches more than once?
+          warn "$ME: warning: skipping $sha due to $skipflag\n";
+        }
+
+      if (! $skipflag)
         {
           if (defined $ignore_line && @line)
             {
diff --git a/doc/misc/texinfo.tex b/doc/misc/texinfo.tex
index d04e2ddd3b3..9437a4d3e31 100644
--- a/doc/misc/texinfo.tex
+++ b/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{2016-03-06.18}
+\def\texinfoversion{2016-03-22.15}
 %
 % Copyright 1985, 1986, 1988, 1990, 1991, 1992, 1993, 1994, 1995,
 % 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
@@ -1513,10 +1513,27 @@ output) for that.)}
 \fi  % \ifx\pdfoutput
 
 %
-% PDF outline support for XeTeX
+% For XeTeX
 %
+\newif\iftxiuseunicodedestname
 \ifx\XeTeXrevision\thisisundefined
 \else
+  %
+  % XeTeX version check
+  %
+  \ifnum\strcmp{\the\XeTeXversion\XeTeXrevision}{0.99995}>-1
+    % XeTeX 0.99995+ contains xdvipdfmx 20160307+.
+    % It can handle Unicode destination name for PDF.
+    \txiuseunicodedestnametrue
+  \else
+    % XeTeX < 0.99995 can not handle Unicode destination name for PDF
+    % because xdvipdfmx 20150315 has UTF-16 convert issue.
+    % It fixed by xdvipdfmx 20160106 (TeX Live SVN r39753).
+    \txiuseunicodedestnamefalse
+  \fi
+  %
+  % PDF outline support
+  %
   \pdfmakepagedesttrue \relax
   % Emulate the primitive of pdfTeX
   \def\pdfdest name#1 xyz{%
@@ -1525,15 +1542,25 @@ output) for that.)}
   \def\pdfmkdest#1{{%
     % We have to set dummies so commands such as @code, and characters
     % such as \, aren't expanded when present in a section title.
-    \indexnofonts  % For avoiding UTF-16 convert issue of xdvipdfmx 20150315.
+    \indexnofonts
+    \iftxiuseunicodedestname
+      \def\pdfdestname{#1}% Pass through Unicode characters.
+    \else
+      \edef\pdfdestname{#1}% Replace Unicode characters to ASCII.
+    \fi
+    \turnoffactive
     \makevalueexpandable
     % In the case of XeTeX, xdvipdfmx converts strings to UTF-16.
     % Therefore \txiescapepdf is not necessary.
-    \safewhatsit{\pdfdest name{#1} xyz}%
+    \safewhatsit{\pdfdest name{\pdfdestname} xyz}%
   }}
   %
   \def\dopdfoutline#1#2#3#4{%
-    \edef\pdfoutlinedest{#3}%
+    \iftxiuseunicodedestname
+      \def\pdfoutlinedest{#3}% Pass through Unicode characters.
+    \else
+      \edef\pdfoutlinedest{#3}% Replace Unicode characters to ASCII.
+    \fi
     \ifx\pdfoutlinedest\empty
       \def\pdfoutlinedest{#4}%
     \fi
@@ -1574,7 +1601,7 @@ output) for that.)}
       % In the case of XeTeX, xdvipdfmx converts strings to UTF-16.
       % Therefore, the encoding and the language may not be considered.
       %
-      \indexnofonts % For avoiding UTF-16 convert issue of xdvipdfmx 20150315.
+      \indexnofonts
       \setupdatafile
       % We can have normal brace characters in the PDF outlines, unlike
       % Texinfo index files.  So set that up.
@@ -1596,14 +1623,31 @@ output) for that.)}
   % However, due to UTF-16 convert issue of xdvipdfmx 20150315,
   % ``\special{pdf:dest ...}'' can not handle non-ASCII strings.
   % It fixed by xdvipdfmx 20160106 (TeX Live SVN r39753).
-\fi
-
 %
-% @image support for XeTeX
+  % make a live url in pdf output.
+  \def\pdfurl#1{%
+    \begingroup
+      % it seems we really need yet another set of dummies; have not
+      % tried to figure out what each command should do in the context
+      % of @url.  for now, just make @/ a no-op, that's the only one
+      % people have actually reported a problem with.
+      %
+      \normalturnoffactive
+      \def\@{@}%
+      \let\/=\empty
+      \makevalueexpandable
+      % do we want to go so far as to use \indexnofonts instead of just
+      % special-casing \var here?
+      \def\var##1{##1}%
+      %
+      \leavevmode\setcolor{\urlcolor}%
+      \special{pdf:bann << /Border [0 0 0]
+        /Subtype /Link /A << /S /URI /URI (#1) >> >>}%
+    \endgroup}
+  \def\endlink{\setcolor{\maincolor}\special{pdf:eann}}
 %
-\newif\ifxeteximgpdf
-\ifx\XeTeXrevision\thisisundefined
-\else
+  %
+  % @image support
   %
   % #1 is image name, #2 width (might be empty/whitespace), #3 height (ditto).
   \def\doxeteximage#1#2#3{%
@@ -1615,7 +1659,6 @@ output) for that.)}
     % someone has a scalable image, presumably better to use that than a
     % bitmap.
     \let\xeteximgext=\empty
-    \xeteximgpdffalse
     \begingroup
       \openin 1 #1.pdf \ifeof 1
         \openin 1 #1.PDF \ifeof 1
@@ -1632,17 +1675,23 @@ output) for that.)}
             \fi
           \else \gdef\xeteximgext{png}%
           \fi
-        \else \gdef\xeteximgext{PDF} \global\xeteximgpdftrue%
+        \else \gdef\xeteximgext{PDF}%
         \fi
-      \else \gdef\xeteximgext{pdf} \global\xeteximgpdftrue%
+      \else \gdef\xeteximgext{pdf}%
       \fi
       \closein 1
     \endgroup
     %
-    \ifxeteximgpdf
+    \def\xetexpdfext{pdf}%
+    \ifx\xeteximgext\xetexpdfext
       \XeTeXpdffile "#1".\xeteximgext ""
     \else
-      \XeTeXpicfile "#1".\xeteximgext ""
+      \def\xetexpdfext{PDF}%
+      \ifx\xeteximgext\xetexpdfext
+        \XeTeXpdffile "#1".\xeteximgext ""
+      \else
+        \XeTeXpicfile "#1".\xeteximgext ""
+      \fi
     \fi
     \ifdim \wd0 >0pt width \xeteximagewidth \fi
     \ifdim \wd2 >0pt height \xeteximageheight \fi \relax
@@ -7804,7 +7853,7 @@ end
   % Process the macro body under the current catcode regime.
   \scantokens{#1\texinfoc}\aftermacro%
   %
-  % The \c is to remove the \newlinechar added by \scantokens, and
+  % The \texinfoc is to remove the \newlinechar added by \scantokens, and
   % can be noticed by \parsearg.
   %   The \aftermacro allows a \comment at the end of the macro definition
   % to duplicate itself past the final \newlinechar added by \scantokens:
@@ -7817,15 +7866,7 @@ end
 
 % Used for copying and captions
 \def\scanexp#1{%
-  \bgroup
-  % Undo catcode changes of \startcontents and \printindex
-  % When called from @insertcopying or (short)caption, we need active
-  % backslash to get it printed correctly.
-  % FIXME: This may not be needed.
-  %\catcode`\@=0 \catcode`\\=\active \escapechar=`\@
-  \edef\temp{\noexpand\scanmacro{#1}}%
-  \temp
-  \egroup
+  \expandafter\scanmacro\expandafter{#1}%
 }
 
 \newcount\paramno   % Count of parameters
@@ -9371,7 +9412,7 @@ end
     %
     \ifx\thiscaption\empty \else
       \ifx\floatident\empty \else
-        \appendtomacro\captionline{: }% had ident, so need a colon between
+        \appendtomacro\captionline{: }% had ident, so need a colon between
       \fi
       %
       % caption text.
@@ -9398,30 +9439,17 @@ end
         \requireauxfile
         \atdummies
         %
-        % since we read the caption text in the macro world, where ^^M
-        % is turned into a normal character, we have to scan it back, so
-        % we don't write the literal three characters "^^M" into the aux file.
-        \scanexp{%
-          \xdef\noexpand\gtemp{%
-            \ifx\thisshortcaption\empty
-              \thiscaption
-            \else
-              \thisshortcaption
-            \fi
-          }%
-        }%
+        \ifx\thisshortcaption\empty
+          \def\gtemp{\thiscaption}%
+        \else
+          \def\gtemp{\thisshortcaption}%
+        \fi
         \immediate\write\auxfile{@xrdef{\floatlabel-lof}{\floatident
-          \ifx\gtemp\empty \else : \gtemp \fi}}%
+          \ifx\gtemp\empty \else : \gtemp \fi}}%
       }%
     \fi
   \egroup  % end of \vtop
   %
-  % place the captured inserts
-  %
-  % BEWARE: when the floats start floating, we have to issue warning
-  % whenever an insert appears inside a float which could possibly
-  % float. --kasal, 26may04
-  %
   \checkinserts
 }
 
@@ -10865,6 +10893,10 @@ directory should work if nowhere else does.}
   \unicodechardefs
 }
 
+% Whether the active definitions of non-ASCII characters expand to
+% non-active tokens with the same character code.  This is used to
+% write characters literally, instead of using active definitions for
+% printing the correct glyphs.
 \newif\ifpassthroughchars
 \passthroughcharsfalse
 
@@ -10917,13 +10949,6 @@ directory should work if nowhere else does.}
    \relax
 }
 
-% Whether the active definitions of non-ASCII characters expand to
-% non-active tokens with the same character code.  This is used to
-% write characters literally, instead of using active definitions for
-% printing the correct glyphs.
-\newif\ifpassthroughchars
-\passthroughcharsfalse
-
 % define all the unicode characters we know about, for the sake of @U.
 \iftxinativeunicodecapable
   \nativeunicodechardefsatu
diff --git a/lib/sys_select.in.h b/lib/sys_select.in.h
index a557e04ab5d..9a2622f9789 100644
--- a/lib/sys_select.in.h
+++ b/lib/sys_select.in.h
@@ -81,8 +81,9 @@
    of 'struct timeval', and no definition of this type.
    Also, Mac OS X, AIX, HP-UX, IRIX, Solaris, Interix declare select()
    in <sys/time.h>.
-   But avoid namespace pollution on glibc systems.  */
-# ifndef __GLIBC__
+   But avoid namespace pollution on glibc systems and "unknown type
+   name" problems on Cygwin.  */
+# if !(defined __GLIBC__ || defined __CYGWIN__)
 #  include <sys/time.h>
 # endif
 
@@ -100,10 +101,11 @@
 #endif
 
 /* Get definition of 'sigset_t'.
-   But avoid namespace pollution on glibc systems.
+   But avoid namespace pollution on glibc systems and "unknown type
+   name" problems on Cygwin.
    Do this after the include_next (for the sake of OpenBSD 5.0) but before
    the split double-inclusion guard (for the sake of Solaris).  */
-#if !(defined __GLIBC__ && !defined __UCLIBC__)
+#if !((defined __GLIBC__ || defined __CYGWIN__) && !defined __UCLIBC__)
 # include <signal.h>
 #endif