Update from Gnulib by running admin/merge-gnulib.

51 files changed, 648 insertions, 340 deletions

diff --git a/lib/alloca.in.h b/lib/alloca.in.h
index d1653081063..0a6137e037c 100644
--- a/lib/alloca.in.h
+++ b/lib/alloca.in.h
@@ -1,7 +1,7 @@
 /* Memory allocation on the stack.
 
-   Copyright (C) 1995, 1999, 2001-2004, 2006-2021 Free Software
-   Foundation, Inc.
+   Copyright (C) 1995, 1999, 2001-2004, 2006-2021 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
diff --git a/lib/binary-io.h b/lib/binary-io.h
index d56be18309d..8654fd2d39f 100644
--- a/lib/binary-io.h
+++ b/lib/binary-io.h
@@ -1,6 +1,5 @@
 /* Binary mode I/O.
-   Copyright (C) 2001, 2003, 2005, 2008-2021 Free Software Foundation,
-   Inc.
+   Copyright (C) 2001, 2003, 2005, 2008-2021 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
diff --git a/lib/c-ctype.h b/lib/c-ctype.h
index 231611b7f6b..bf24a88310e 100644
--- a/lib/c-ctype.h
+++ b/lib/c-ctype.h
@@ -5,8 +5,7 @@
    <ctype.h> functions' behaviour depends on the current locale set via
    setlocale.
 
-   Copyright (C) 2000-2003, 2006, 2008-2021 Free Software Foundation,
-   Inc.
+   Copyright (C) 2000-2003, 2006, 2008-2021 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
diff --git a/lib/c-strcasecmp.c b/lib/c-strcasecmp.c
index 10f23e924a4..55479d6a338 100644
--- a/lib/c-strcasecmp.c
+++ b/lib/c-strcasecmp.c
@@ -1,6 +1,5 @@
 /* c-strcasecmp.c -- case insensitive string comparator in C locale
-   Copyright (C) 1998-1999, 2005-2006, 2009-2021 Free Software
-   Foundation, Inc.
+   Copyright (C) 1998-1999, 2005-2006, 2009-2021 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
diff --git a/lib/c-strncasecmp.c b/lib/c-strncasecmp.c
index ad7bfeb7dbf..02bc0f2ecd5 100644
--- a/lib/c-strncasecmp.c
+++ b/lib/c-strncasecmp.c
@@ -1,6 +1,5 @@
 /* c-strncasecmp.c -- case insensitive string comparator in C locale
-   Copyright (C) 1998-1999, 2005-2006, 2009-2021 Free Software
-   Foundation, Inc.
+   Copyright (C) 1998-1999, 2005-2006, 2009-2021 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
diff --git a/lib/canonicalize-lgpl.c b/lib/canonicalize-lgpl.c
index dcc6e12d9c5..b6dc3a447ab 100644
--- a/lib/canonicalize-lgpl.c
+++ b/lib/canonicalize-lgpl.c
@@ -32,7 +32,6 @@
 #include <fcntl.h>
 #include <limits.h>
 #include <stdbool.h>
-#include <stddef.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <unistd.h>
@@ -40,16 +39,11 @@
 #include <eloop-threshold.h>
 #include <filename.h>
 #include <idx.h>
+#include <intprops.h>
 #include <scratch_buffer.h>
 
 #ifdef _LIBC
 # include <shlib-compat.h>
-# include <sysdep.h>
-# ifdef __ASSUME_FACCESSAT2
-#  define FACCESSAT_NEVER_EOVERFLOWS __ASSUME_FACCESSAT2
-# else
-#  define FACCESSAT_NEVER_EOVERFLOWS true
-# endif
 # define GCC_LINT 1
 # define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
 #else
@@ -91,14 +85,15 @@
 # define IF_LINT(Code) /* empty */
 #endif
 
+/* True if adding two valid object sizes might overflow idx_t.
+   As a practical matter, this cannot happen on 64-bit machines.  */
+enum { NARROW_ADDRESSES = IDX_MAX >> 31 >> 31 == 0 };
+
 #ifndef DOUBLE_SLASH_IS_DISTINCT_ROOT
 # define DOUBLE_SLASH_IS_DISTINCT_ROOT false
 #endif
-#ifndef FACCESSAT_NEVER_EOVERFLOWS
-# define FACCESSAT_NEVER_EOVERFLOWS false
-#endif
 
-#if !FUNC_REALPATH_WORKS || defined _LIBC
+#if defined _LIBC || !FUNC_REALPATH_WORKS
 
 /* Return true if FILE's existence can be shown, false (setting errno)
    otherwise.  Follow symbolic links.  */
@@ -106,14 +101,11 @@ static bool
 file_accessible (char const *file)
 {
 # if defined _LIBC || HAVE_FACCESSAT
-  int r = __faccessat (AT_FDCWD, file, F_OK, AT_EACCESS);
+  return __faccessat (AT_FDCWD, file, F_OK, AT_EACCESS) == 0;
 # else
   struct stat st;
-  int r = __stat (file, &st);
+  return __stat (file, &st) == 0 || errno == EOVERFLOW;
 # endif
-
-  return ((!FACCESSAT_NEVER_EOVERFLOWS && r < 0 && errno == EOVERFLOW)
-          || r == 0);
 }
 
 /* True if concatenating END as a suffix to a file name means that the
@@ -350,7 +342,12 @@ realpath_stk (const char *name, char *resolved,
               idx_t end_idx IF_LINT (= 0);
               if (end_in_extra_buffer)
                 end_idx = end - extra_buf;
-              idx_t len = strlen (end);
+              size_t len = strlen (end);
+              if (NARROW_ADDRESSES && INT_ADD_OVERFLOW (len, n))
+                {
+                  __set_errno (ENOMEM);
+                  goto error_nomem;
+                }
               while (extra_buffer.length <= len + n)
                 {
                   if (!scratch_buffer_grow_preserve (&extra_buffer))
@@ -413,24 +410,14 @@ error:
 error_nomem:
   scratch_buffer_free (&extra_buffer);
   scratch_buffer_free (&link_buffer);
-  if (failed || rname == resolved)
-    scratch_buffer_free (rname_buf);
-
-  if (failed)
-    return NULL;
 
-  if (rname == resolved)
-    return rname;
-  idx_t rname_size = dest - rname;
-  if (rname == rname_on_stack)
+  if (failed || rname == resolved)
     {
-      rname = malloc (rname_size);
-      if (rname == NULL)
-        return NULL;
-      return memcpy (rname, rname_on_stack, rname_size);
+      scratch_buffer_free (rname_buf);
+      return failed ? NULL : resolved;
     }
-  char *result = realloc (rname, rname_size);
-  return result != NULL ? result : rname;
+
+  return scratch_buffer_dupfree (rname_buf, dest - rname);
 }
 
 /* Return the canonical absolute name of file NAME.  A canonical name
diff --git a/lib/careadlinkat.c b/lib/careadlinkat.c
index c6d7c35effa..18cfc114b69 100644
--- a/lib/careadlinkat.c
+++ b/lib/careadlinkat.c
@@ -1,7 +1,7 @@
 /* Read symbolic links into a buffer without size limitation, relative to fd.
 
-   Copyright (C) 2001, 2003-2004, 2007, 2009-2021 Free Software
-   Foundation, Inc.
+   Copyright (C) 2001, 2003-2004, 2007, 2009-2021 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
diff --git a/lib/cloexec.c b/lib/cloexec.c
index 3286ad34323..8363ddaa609 100644
--- a/lib/cloexec.c
+++ b/lib/cloexec.c
@@ -1,7 +1,6 @@
 /* cloexec.c - set or clear the close-on-exec descriptor flag
 
-   Copyright (C) 1991, 2004-2006, 2009-2021 Free Software Foundation,
-   Inc.
+   Copyright (C) 1991, 2004-2006, 2009-2021 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
diff --git a/lib/close-stream.c b/lib/close-stream.c
index 11cc11fe99e..86f6d6e1de2 100644
--- a/lib/close-stream.c
+++ b/lib/close-stream.c
@@ -1,7 +1,6 @@
 /* Close a stream, with nicer error checking than fclose's.
 
-   Copyright (C) 1998-2002, 2004, 2006-2021 Free Software Foundation,
-   Inc.
+   Copyright (C) 1998-2002, 2004, 2006-2021 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
diff --git a/lib/diffseq.h b/lib/diffseq.h
index 570f09d6be0..1cac430eddd 100644
--- a/lib/diffseq.h
+++ b/lib/diffseq.h
@@ -1,7 +1,7 @@
 /* Analyze differences between two vectors.
 
-   Copyright (C) 1988-1989, 1992-1995, 2001-2004, 2006-2021 Free
-   Software Foundation, Inc.
+   Copyright (C) 1988-1989, 1992-1995, 2001-2004, 2006-2021 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
diff --git a/lib/dup2.c b/lib/dup2.c
index 0a17c811ac5..c4a0a29fbd0 100644
--- a/lib/dup2.c
+++ b/lib/dup2.c
@@ -1,7 +1,6 @@
 /* Duplicate an open file descriptor to a specified file descriptor.
 
-   Copyright (C) 1999, 2004-2007, 2009-2021 Free Software Foundation,
-   Inc.
+   Copyright (C) 1999, 2004-2007, 2009-2021 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
diff --git a/lib/faccessat.c b/lib/faccessat.c
index 93e99b48f0c..3a776466cf2 100644
--- a/lib/faccessat.c
+++ b/lib/faccessat.c
@@ -32,13 +32,6 @@
 #include <sys/stat.h>
 #undef _GL_INCLUDING_UNISTD_H
 
-#ifndef FACCESSAT_NEVER_EOVERFLOWS
-# define FACCESSAT_NEVER_EOVERFLOWS 0
-#endif
-#ifndef LSTAT_FOLLOWS_SLASHED_SYMLINK
-# define LSTAT_FOLLOWS_SLASHED_SYMLINK 0
-#endif
-
 #if HAVE_FACCESSAT
 static int
 orig_faccessat (int fd, char const *name, int mode, int flag)
@@ -66,12 +59,7 @@ rpl_faccessat (int fd, char const *file, int mode, int flag)
 {
   int result = orig_faccessat (fd, file, mode, flag);
 
-  if (result != 0)
-    {
-      if (!FACCESSAT_NEVER_EOVERFLOWS && mode == F_OK && errno == EOVERFLOW)
-        return 0;
-    }
-  else if (!LSTAT_FOLLOWS_SLASHED_SYMLINK && file[strlen (file) - 1] == '/')
+  if (result == 0 && file[strlen (file) - 1] == '/')
     {
       struct stat st;
       result = fstatat (fd, file, &st, 0);
diff --git a/lib/fcntl.in.h b/lib/fcntl.in.h
index cbc4af4dc47..0b14467c54d 100644
--- a/lib/fcntl.in.h
+++ b/lib/fcntl.in.h
@@ -112,7 +112,7 @@ _GL_CXXALIASWARN (creat);
 /* Assume creat is always declared.  */
 _GL_WARN_ON_USE (creat, "creat is not always POSIX compliant - "
                  "use gnulib module creat for portability");
-#else
+#elif @GNULIB_MDA_CREAT@
 /* On native Windows, map 'creat' to '_creat', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::creat always.  */
@@ -186,7 +186,7 @@ _GL_CXXALIASWARN (open);
 /* Assume open is always declared.  */
 _GL_WARN_ON_USE (open, "open is not always POSIX compliant - "
                  "use gnulib module open for portability");
-#else
+#elif @GNULIB_MDA_OPEN@
 /* On native Windows, map 'open' to '_open', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::open always.  */
diff --git a/lib/filemode.h b/lib/filemode.h
index dc240db270c..a02facb757d 100644
--- a/lib/filemode.h
+++ b/lib/filemode.h
@@ -1,7 +1,7 @@
 /* Make a string describing file modes.
 
-   Copyright (C) 1998-1999, 2003, 2006, 2009-2021 Free Software
-   Foundation, Inc.
+   Copyright (C) 1998-1999, 2003, 2006, 2009-2021 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
diff --git a/lib/filename.h b/lib/filename.h
index 5bd86f48050..541ffec0d53 100644
--- a/lib/filename.h
+++ b/lib/filename.h
@@ -1,18 +1,20 @@
 /* Basic filename support macros.
    Copyright (C) 2001-2004, 2007-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
 
-   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.
+   The GNU C Library 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,
+   The GNU C Library 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.
+   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 <https://www.gnu.org/licenses/>.  */
+   You should have received a copy of the GNU General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
 
 /* From Paul Eggert and Jim Meyering.  */
 
diff --git a/lib/fpending.c b/lib/fpending.c
index abcb596174a..7c61f7eea75 100644
--- a/lib/fpending.c
+++ b/lib/fpending.c
@@ -1,6 +1,6 @@
 /* fpending.c -- return the number of pending output bytes on a stream
-   Copyright (C) 2000, 2004, 2006-2007, 2009-2021 Free Software
-   Foundation, Inc.
+   Copyright (C) 2000, 2004, 2006-2007, 2009-2021 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
diff --git a/lib/fpending.h b/lib/fpending.h
index 246b62ffb3d..016341bab57 100644
--- a/lib/fpending.h
+++ b/lib/fpending.h
@@ -1,7 +1,7 @@
 /* Declare __fpending.
 
-   Copyright (C) 2000, 2003, 2005-2006, 2009-2021 Free Software
-   Foundation, Inc.
+   Copyright (C) 2000, 2003, 2005-2006, 2009-2021 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
diff --git a/lib/fsusage.c b/lib/fsusage.c
index 57116f28e56..35de136cd8e 100644
--- a/lib/fsusage.c
+++ b/lib/fsusage.c
@@ -1,7 +1,7 @@
 /* fsusage.c -- return space usage of mounted file systems
 
-   Copyright (C) 1991-1992, 1996, 1998-1999, 2002-2006, 2009-2021 Free
-   Software Foundation, Inc.
+   Copyright (C) 1991-1992, 1996, 1998-1999, 2002-2006, 2009-2021 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
diff --git a/lib/getgroups.c b/lib/getgroups.c
index a1bbb6617cd..af602a74d3a 100644
--- a/lib/getgroups.c
+++ b/lib/getgroups.c
@@ -1,7 +1,6 @@
 /* provide consistent interface to getgroups for systems that don't allow N==0
 
-   Copyright (C) 1996, 1999, 2003, 2006-2021 Free Software Foundation,
-   Inc.
+   Copyright (C) 1996, 1999, 2003, 2006-2021 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
diff --git a/lib/getloadavg.c b/lib/getloadavg.c
index 8668ee3f2a6..d42d0cd2797 100644
--- a/lib/getloadavg.c
+++ b/lib/getloadavg.c
@@ -1,7 +1,7 @@
 /* Get the system load averages.
 
-   Copyright (C) 1985-1989, 1991-1995, 1997, 1999-2000, 2003-2021 Free
-   Software Foundation, Inc.
+   Copyright (C) 1985-1989, 1991-1995, 1997, 1999-2000, 2003-2021 Free Software
+   Foundation, Inc.
 
    NOTE: The canonical source of this file is maintained with gnulib.
    Bugs can be reported to bug-gnulib@gnu.org.
diff --git a/lib/gettext.h b/lib/gettext.h
index 8c7c3a61324..3552157efd9 100644
--- a/lib/gettext.h
+++ b/lib/gettext.h
@@ -1,6 +1,6 @@
 /* Convenience header for conditional use of GNU <libintl.h>.
-   Copyright (C) 1995-1998, 2000-2002, 2004-2006, 2009-2021 Free
-   Software Foundation, Inc.
+   Copyright (C) 1995-1998, 2000-2002, 2004-2006, 2009-2021 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
diff --git a/lib/gettime.c b/lib/gettime.c
index 82fac300024..fb721b2cda1 100644
--- a/lib/gettime.c
+++ b/lib/gettime.c
@@ -1,7 +1,6 @@
 /* gettime -- get the system clock
 
-   Copyright (C) 2002, 2004-2007, 2009-2021 Free Software Foundation,
-   Inc.
+   Copyright (C) 2002, 2004-2007, 2009-2021 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
diff --git a/lib/gettimeofday.c b/lib/gettimeofday.c
index 363a2acb536..b1c93e1c3a3 100644
--- a/lib/gettimeofday.c
+++ b/lib/gettimeofday.c
@@ -1,7 +1,6 @@
 /* Provide gettimeofday for systems that don't have it or for which it's broken.
 
-   Copyright (C) 2001-2003, 2005-2007, 2009-2021 Free Software
-   Foundation, Inc.
+   Copyright (C) 2001-2003, 2005-2007, 2009-2021 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
diff --git a/lib/gnulib.mk.in b/lib/gnulib.mk.in
index 60358f717fb..c457ac61209 100644
--- a/lib/gnulib.mk.in
+++ b/lib/gnulib.mk.in
@@ -242,7 +242,6 @@ GETOPT_CDEFS_H = @GETOPT_CDEFS_H@
 GETOPT_H = @GETOPT_H@
 GFILENOTIFY_CFLAGS = @GFILENOTIFY_CFLAGS@
 GFILENOTIFY_LIBS = @GFILENOTIFY_LIBS@
-GLIBC21 = @GLIBC21@
 GL_COND_LIBTOOL = @GL_COND_LIBTOOL@
 GL_GENERATE_ALLOCA_H = @GL_GENERATE_ALLOCA_H@
 GL_GENERATE_BYTESWAP_H = @GL_GENERATE_BYTESWAP_H@
@@ -277,6 +276,13 @@ GNULIB_DUP2 = @GNULIB_DUP2@
 GNULIB_DUP3 = @GNULIB_DUP3@
 GNULIB_ENVIRON = @GNULIB_ENVIRON@
 GNULIB_EUIDACCESS = @GNULIB_EUIDACCESS@
+GNULIB_EXECL = @GNULIB_EXECL@
+GNULIB_EXECLE = @GNULIB_EXECLE@
+GNULIB_EXECLP = @GNULIB_EXECLP@
+GNULIB_EXECV = @GNULIB_EXECV@
+GNULIB_EXECVE = @GNULIB_EXECVE@
+GNULIB_EXECVP = @GNULIB_EXECVP@
+GNULIB_EXECVPE = @GNULIB_EXECVPE@
 GNULIB_EXPLICIT_BZERO = @GNULIB_EXPLICIT_BZERO@
 GNULIB_FACCESSAT = @GNULIB_FACCESSAT@
 GNULIB_FCHDIR = @GNULIB_FCHDIR@
@@ -362,10 +368,51 @@ GNULIB_MBSSPN = @GNULIB_MBSSPN@
 GNULIB_MBSSTR = @GNULIB_MBSSTR@
 GNULIB_MBSTOK_R = @GNULIB_MBSTOK_R@
 GNULIB_MBTOWC = @GNULIB_MBTOWC@
+GNULIB_MDA_ACCESS = @GNULIB_MDA_ACCESS@
+GNULIB_MDA_CHDIR = @GNULIB_MDA_CHDIR@
+GNULIB_MDA_CHMOD = @GNULIB_MDA_CHMOD@
+GNULIB_MDA_CLOSE = @GNULIB_MDA_CLOSE@
+GNULIB_MDA_CREAT = @GNULIB_MDA_CREAT@
+GNULIB_MDA_DUP = @GNULIB_MDA_DUP@
+GNULIB_MDA_DUP2 = @GNULIB_MDA_DUP2@
+GNULIB_MDA_ECVT = @GNULIB_MDA_ECVT@
+GNULIB_MDA_EXECL = @GNULIB_MDA_EXECL@
+GNULIB_MDA_EXECLE = @GNULIB_MDA_EXECLE@
+GNULIB_MDA_EXECLP = @GNULIB_MDA_EXECLP@
+GNULIB_MDA_EXECV = @GNULIB_MDA_EXECV@
+GNULIB_MDA_EXECVE = @GNULIB_MDA_EXECVE@
+GNULIB_MDA_EXECVP = @GNULIB_MDA_EXECVP@
+GNULIB_MDA_EXECVPE = @GNULIB_MDA_EXECVPE@
+GNULIB_MDA_FCLOSEALL = @GNULIB_MDA_FCLOSEALL@
+GNULIB_MDA_FCVT = @GNULIB_MDA_FCVT@
+GNULIB_MDA_FDOPEN = @GNULIB_MDA_FDOPEN@
+GNULIB_MDA_FILENO = @GNULIB_MDA_FILENO@
+GNULIB_MDA_GCVT = @GNULIB_MDA_GCVT@
+GNULIB_MDA_GETCWD = @GNULIB_MDA_GETCWD@
+GNULIB_MDA_GETPID = @GNULIB_MDA_GETPID@
+GNULIB_MDA_GETW = @GNULIB_MDA_GETW@
+GNULIB_MDA_ISATTY = @GNULIB_MDA_ISATTY@
+GNULIB_MDA_LSEEK = @GNULIB_MDA_LSEEK@
+GNULIB_MDA_MEMCCPY = @GNULIB_MDA_MEMCCPY@
+GNULIB_MDA_MKDIR = @GNULIB_MDA_MKDIR@
+GNULIB_MDA_MKTEMP = @GNULIB_MDA_MKTEMP@
+GNULIB_MDA_OPEN = @GNULIB_MDA_OPEN@
+GNULIB_MDA_PUTENV = @GNULIB_MDA_PUTENV@
+GNULIB_MDA_PUTW = @GNULIB_MDA_PUTW@
+GNULIB_MDA_READ = @GNULIB_MDA_READ@
+GNULIB_MDA_RMDIR = @GNULIB_MDA_RMDIR@
+GNULIB_MDA_STRDUP = @GNULIB_MDA_STRDUP@
+GNULIB_MDA_SWAB = @GNULIB_MDA_SWAB@
+GNULIB_MDA_TEMPNAM = @GNULIB_MDA_TEMPNAM@
+GNULIB_MDA_TZSET = @GNULIB_MDA_TZSET@
+GNULIB_MDA_UMASK = @GNULIB_MDA_UMASK@
+GNULIB_MDA_UNLINK = @GNULIB_MDA_UNLINK@
+GNULIB_MDA_WRITE = @GNULIB_MDA_WRITE@
 GNULIB_MEMCHR = @GNULIB_MEMCHR@
 GNULIB_MEMMEM = @GNULIB_MEMMEM@
 GNULIB_MEMPCPY = @GNULIB_MEMPCPY@
 GNULIB_MEMRCHR = @GNULIB_MEMRCHR@
+GNULIB_MKDIR = @GNULIB_MKDIR@
 GNULIB_MKDIRAT = @GNULIB_MKDIRAT@
 GNULIB_MKDTEMP = @GNULIB_MKDTEMP@
 GNULIB_MKFIFO = @GNULIB_MKFIFO@
@@ -567,6 +614,7 @@ HAVE_DIRENT_H = @HAVE_DIRENT_H@
 HAVE_DPRINTF = @HAVE_DPRINTF@
 HAVE_DUP3 = @HAVE_DUP3@
 HAVE_EUIDACCESS = @HAVE_EUIDACCESS@
+HAVE_EXECVPE = @HAVE_EXECVPE@
 HAVE_EXPLICIT_BZERO = @HAVE_EXPLICIT_BZERO@
 HAVE_FACCESSAT = @HAVE_FACCESSAT@
 HAVE_FCHDIR = @HAVE_FCHDIR@
@@ -886,6 +934,13 @@ REPLACE_DIRFD = @REPLACE_DIRFD@
 REPLACE_DPRINTF = @REPLACE_DPRINTF@
 REPLACE_DUP = @REPLACE_DUP@
 REPLACE_DUP2 = @REPLACE_DUP2@
+REPLACE_EXECL = @REPLACE_EXECL@
+REPLACE_EXECLE = @REPLACE_EXECLE@
+REPLACE_EXECLP = @REPLACE_EXECLP@
+REPLACE_EXECV = @REPLACE_EXECV@
+REPLACE_EXECVE = @REPLACE_EXECVE@
+REPLACE_EXECVP = @REPLACE_EXECVP@
+REPLACE_EXECVPE = @REPLACE_EXECVPE@
 REPLACE_FACCESSAT = @REPLACE_FACCESSAT@
 REPLACE_FCHMODAT = @REPLACE_FCHMODAT@
 REPLACE_FCHOWNAT = @REPLACE_FCHOWNAT@
@@ -1111,11 +1166,11 @@ gl_GNULIB_ENABLED_260941c0e5dc67ec9e87d1fb321c300b = @gl_GNULIB_ENABLED_260941c0
 gl_GNULIB_ENABLED_5264294aa0a5557541b53c8c741f7f31 = @gl_GNULIB_ENABLED_5264294aa0a5557541b53c8c741f7f31@
 gl_GNULIB_ENABLED_6099e9737f757db36c47fa9d9f02e88c = @gl_GNULIB_ENABLED_6099e9737f757db36c47fa9d9f02e88c@
 gl_GNULIB_ENABLED_682e609604ccaac6be382e4ee3a4eaec = @gl_GNULIB_ENABLED_682e609604ccaac6be382e4ee3a4eaec@
+gl_GNULIB_ENABLED_925677f0343de64b89a9f0c790b4104c = @gl_GNULIB_ENABLED_925677f0343de64b89a9f0c790b4104c@
 gl_GNULIB_ENABLED_a9786850e999ae65a836a6041e8e5ed1 = @gl_GNULIB_ENABLED_a9786850e999ae65a836a6041e8e5ed1@
 gl_GNULIB_ENABLED_be453cec5eecf5731a274f2de7f2db36 = @gl_GNULIB_ENABLED_be453cec5eecf5731a274f2de7f2db36@
 gl_GNULIB_ENABLED_cloexec = @gl_GNULIB_ENABLED_cloexec@
 gl_GNULIB_ENABLED_dirfd = @gl_GNULIB_ENABLED_dirfd@
-gl_GNULIB_ENABLED_ef07dc4b3077c11ea9cef586db4e5955 = @gl_GNULIB_ENABLED_ef07dc4b3077c11ea9cef586db4e5955@
 gl_GNULIB_ENABLED_euidaccess = @gl_GNULIB_ENABLED_euidaccess@
 gl_GNULIB_ENABLED_getdtablesize = @gl_GNULIB_ENABLED_getdtablesize@
 gl_GNULIB_ENABLED_getgroups = @gl_GNULIB_ENABLED_getgroups@
@@ -1680,6 +1735,8 @@ fcntl.h: fcntl.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H)
               -e 's/@''GNULIB_NONBLOCKING''@/$(GNULIB_NONBLOCKING)/g' \
               -e 's/@''GNULIB_OPEN''@/$(GNULIB_OPEN)/g' \
               -e 's/@''GNULIB_OPENAT''@/$(GNULIB_OPENAT)/g' \
+              -e 's/@''GNULIB_MDA_CREAT''@/$(GNULIB_MDA_CREAT)/g' \
+              -e 's/@''GNULIB_MDA_OPEN''@/$(GNULIB_MDA_OPEN)/g' \
               -e 's|@''HAVE_FCNTL''@|$(HAVE_FCNTL)|g' \
               -e 's|@''HAVE_OPENAT''@|$(HAVE_OPENAT)|g' \
               -e 's|@''REPLACE_CREAT''@|$(REPLACE_CREAT)|g' \
@@ -2361,7 +2418,7 @@ endif
 ifeq (,$(OMIT_GNULIB_MODULE_scratch_buffer))
 
 ifneq (,$(gl_GNULIB_ENABLED_scratch_buffer))
-libgnu_a_SOURCES += malloc/scratch_buffer_grow.c                 malloc/scratch_buffer_grow_preserve.c                 malloc/scratch_buffer_set_array_size.c
+libgnu_a_SOURCES += malloc/scratch_buffer_dupfree.c                 malloc/scratch_buffer_grow.c                 malloc/scratch_buffer_grow_preserve.c                 malloc/scratch_buffer_set_array_size.c
 
 endif
 EXTRA_DIST += malloc/scratch_buffer.h scratch_buffer.h
@@ -2679,6 +2736,12 @@ stdio.h: stdio.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H)
               -e 's/@''GNULIB_VPRINTF_POSIX''@/$(GNULIB_VPRINTF_POSIX)/g' \
               -e 's/@''GNULIB_VSNPRINTF''@/$(GNULIB_VSNPRINTF)/g' \
               -e 's/@''GNULIB_VSPRINTF_POSIX''@/$(GNULIB_VSPRINTF_POSIX)/g' \
+              -e 's/@''GNULIB_MDA_FCLOSEALL''@/$(GNULIB_MDA_FCLOSEALL)/g' \
+              -e 's/@''GNULIB_MDA_FDOPEN''@/$(GNULIB_MDA_FDOPEN)/g' \
+              -e 's/@''GNULIB_MDA_FILENO''@/$(GNULIB_MDA_FILENO)/g' \
+              -e 's/@''GNULIB_MDA_GETW''@/$(GNULIB_MDA_GETW)/g' \
+              -e 's/@''GNULIB_MDA_PUTW''@/$(GNULIB_MDA_PUTW)/g' \
+              -e 's/@''GNULIB_MDA_TEMPNAM''@/$(GNULIB_MDA_TEMPNAM)/g' \
               < $(srcdir)/stdio.in.h | \
           sed -e 's|@''HAVE_DECL_FCLOSEALL''@|$(HAVE_DECL_FCLOSEALL)|g' \
               -e 's|@''HAVE_DECL_FPURGE''@|$(HAVE_DECL_FPURGE)|g' \
@@ -2796,6 +2859,11 @@ stdlib.h: stdlib.in.h $(top_builddir)/config.status $(CXXDEFS_H) \
               -e 's/@''GNULIB_UNLOCKPT''@/$(GNULIB_UNLOCKPT)/g' \
               -e 's/@''GNULIB_UNSETENV''@/$(GNULIB_UNSETENV)/g' \
               -e 's/@''GNULIB_WCTOMB''@/$(GNULIB_WCTOMB)/g' \
+              -e 's/@''GNULIB_MDA_ECVT''@/$(GNULIB_MDA_ECVT)/g' \
+              -e 's/@''GNULIB_MDA_FCVT''@/$(GNULIB_MDA_FCVT)/g' \
+              -e 's/@''GNULIB_MDA_GCVT''@/$(GNULIB_MDA_GCVT)/g' \
+              -e 's/@''GNULIB_MDA_MKTEMP''@/$(GNULIB_MDA_MKTEMP)/g' \
+              -e 's/@''GNULIB_MDA_PUTENV''@/$(GNULIB_MDA_PUTENV)/g' \
               < $(srcdir)/stdlib.in.h | \
           sed -e 's|@''HAVE__EXIT''@|$(HAVE__EXIT)|g' \
               -e 's|@''HAVE_ALIGNED_ALLOC''@|$(HAVE_ALIGNED_ALLOC)|g' \
@@ -2941,6 +3009,8 @@ string.h: string.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H
               -e 's/@''GNULIB_SIGDESCR_NP''@/$(GNULIB_SIGDESCR_NP)/g' \
               -e 's/@''GNULIB_STRSIGNAL''@/$(GNULIB_STRSIGNAL)/g' \
               -e 's/@''GNULIB_STRVERSCMP''@/$(GNULIB_STRVERSCMP)/g' \
+              -e 's/@''GNULIB_MDA_MEMCCPY''@/$(GNULIB_MDA_MEMCCPY)/g' \
+              -e 's/@''GNULIB_MDA_STRDUP''@/$(GNULIB_MDA_STRDUP)/g' \
               < $(srcdir)/string.in.h | \
           sed -e 's|@''HAVE_EXPLICIT_BZERO''@|$(HAVE_EXPLICIT_BZERO)|g' \
               -e 's|@''HAVE_FFSL''@|$(HAVE_FFSL)|g' \
@@ -3136,6 +3206,7 @@ sys/stat.h: sys_stat.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNU
               -e 's/@''GNULIB_GETUMASK''@/$(GNULIB_GETUMASK)/g' \
               -e 's/@''GNULIB_LCHMOD''@/$(GNULIB_LCHMOD)/g' \
               -e 's/@''GNULIB_LSTAT''@/$(GNULIB_LSTAT)/g' \
+              -e 's/@''GNULIB_MKDIR''@/$(GNULIB_MKDIR)/g' \
               -e 's/@''GNULIB_MKDIRAT''@/$(GNULIB_MKDIRAT)/g' \
               -e 's/@''GNULIB_MKFIFO''@/$(GNULIB_MKFIFO)/g' \
               -e 's/@''GNULIB_MKFIFOAT''@/$(GNULIB_MKFIFOAT)/g' \
@@ -3144,6 +3215,9 @@ sys/stat.h: sys_stat.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNU
               -e 's/@''GNULIB_STAT''@/$(GNULIB_STAT)/g' \
               -e 's/@''GNULIB_UTIMENSAT''@/$(GNULIB_UTIMENSAT)/g' \
               -e 's/@''GNULIB_OVERRIDES_STRUCT_STAT''@/$(GNULIB_OVERRIDES_STRUCT_STAT)/g' \
+              -e 's/@''GNULIB_MDA_CHMOD''@/$(GNULIB_MDA_CHMOD)/g' \
+              -e 's/@''GNULIB_MDA_MKDIR''@/$(GNULIB_MDA_MKDIR)/g' \
+              -e 's/@''GNULIB_MDA_UMASK''@/$(GNULIB_MDA_UMASK)/g' \
               -e 's|@''HAVE_FCHMODAT''@|$(HAVE_FCHMODAT)|g' \
               -e 's|@''HAVE_FSTATAT''@|$(HAVE_FSTATAT)|g' \
               -e 's|@''HAVE_FUTIMENS''@|$(HAVE_FUTIMENS)|g' \
@@ -3279,6 +3353,7 @@ time.h: time.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(
               -e 's/@''GNULIB_TIME_R''@/$(GNULIB_TIME_R)/g' \
               -e 's/@''GNULIB_TIME_RZ''@/$(GNULIB_TIME_RZ)/g' \
               -e 's/@''GNULIB_TZSET''@/$(GNULIB_TZSET)/g' \
+              -e 's/@''GNULIB_MDA_TZSET''@/$(GNULIB_MDA_TZSET)/g' \
               -e 's|@''HAVE_DECL_LOCALTIME_R''@|$(HAVE_DECL_LOCALTIME_R)|g' \
               -e 's|@''HAVE_NANOSLEEP''@|$(HAVE_NANOSLEEP)|g' \
               -e 's|@''HAVE_STRPTIME''@|$(HAVE_STRPTIME)|g' \
@@ -3407,6 +3482,13 @@ unistd.h: unistd.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H
               -e 's/@''GNULIB_DUP3''@/$(GNULIB_DUP3)/g' \
               -e 's/@''GNULIB_ENVIRON''@/$(GNULIB_ENVIRON)/g' \
               -e 's/@''GNULIB_EUIDACCESS''@/$(GNULIB_EUIDACCESS)/g' \
+              -e 's/@''GNULIB_EXECL''@/$(GNULIB_EXECL)/g' \
+              -e 's/@''GNULIB_EXECLE''@/$(GNULIB_EXECLE)/g' \
+              -e 's/@''GNULIB_EXECLP''@/$(GNULIB_EXECLP)/g' \
+              -e 's/@''GNULIB_EXECV''@/$(GNULIB_EXECV)/g' \
+              -e 's/@''GNULIB_EXECVE''@/$(GNULIB_EXECVE)/g' \
+              -e 's/@''GNULIB_EXECVP''@/$(GNULIB_EXECVP)/g' \
+              -e 's/@''GNULIB_EXECVPE''@/$(GNULIB_EXECVPE)/g' \
               -e 's/@''GNULIB_FACCESSAT''@/$(GNULIB_FACCESSAT)/g' \
               -e 's/@''GNULIB_FCHDIR''@/$(GNULIB_FCHDIR)/g' \
               -e 's/@''GNULIB_FCHOWNAT''@/$(GNULIB_FCHOWNAT)/g' \
@@ -3452,11 +3534,33 @@ unistd.h: unistd.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H
               -e 's/@''GNULIB_UNLINKAT''@/$(GNULIB_UNLINKAT)/g' \
               -e 's/@''GNULIB_USLEEP''@/$(GNULIB_USLEEP)/g' \
               -e 's/@''GNULIB_WRITE''@/$(GNULIB_WRITE)/g' \
+              -e 's/@''GNULIB_MDA_ACCESS''@/$(GNULIB_MDA_ACCESS)/g' \
+              -e 's/@''GNULIB_MDA_CHDIR''@/$(GNULIB_MDA_CHDIR)/g' \
+              -e 's/@''GNULIB_MDA_CLOSE''@/$(GNULIB_MDA_CLOSE)/g' \
+              -e 's/@''GNULIB_MDA_DUP''@/$(GNULIB_MDA_DUP)/g' \
+              -e 's/@''GNULIB_MDA_DUP2''@/$(GNULIB_MDA_DUP2)/g' \
+              -e 's/@''GNULIB_MDA_EXECL''@/$(GNULIB_MDA_EXECL)/g' \
+              -e 's/@''GNULIB_MDA_EXECLE''@/$(GNULIB_MDA_EXECLE)/g' \
+              -e 's/@''GNULIB_MDA_EXECLP''@/$(GNULIB_MDA_EXECLP)/g' \
+              -e 's/@''GNULIB_MDA_EXECV''@/$(GNULIB_MDA_EXECV)/g' \
+              -e 's/@''GNULIB_MDA_EXECVE''@/$(GNULIB_MDA_EXECVE)/g' \
+              -e 's/@''GNULIB_MDA_EXECVP''@/$(GNULIB_MDA_EXECVP)/g' \
+              -e 's/@''GNULIB_MDA_EXECVPE''@/$(GNULIB_MDA_EXECVPE)/g' \
+              -e 's/@''GNULIB_MDA_GETCWD''@/$(GNULIB_MDA_GETCWD)/g' \
+              -e 's/@''GNULIB_MDA_GETPID''@/$(GNULIB_MDA_GETPID)/g' \
+              -e 's/@''GNULIB_MDA_ISATTY''@/$(GNULIB_MDA_ISATTY)/g' \
+              -e 's/@''GNULIB_MDA_LSEEK''@/$(GNULIB_MDA_LSEEK)/g' \
+              -e 's/@''GNULIB_MDA_READ''@/$(GNULIB_MDA_READ)/g' \
+              -e 's/@''GNULIB_MDA_RMDIR''@/$(GNULIB_MDA_RMDIR)/g' \
+              -e 's/@''GNULIB_MDA_SWAB''@/$(GNULIB_MDA_SWAB)/g' \
+              -e 's/@''GNULIB_MDA_UNLINK''@/$(GNULIB_MDA_UNLINK)/g' \
+              -e 's/@''GNULIB_MDA_WRITE''@/$(GNULIB_MDA_WRITE)/g' \
               < $(srcdir)/unistd.in.h | \
           sed -e 's|@''HAVE_CHOWN''@|$(HAVE_CHOWN)|g' \
               -e 's|@''HAVE_COPY_FILE_RANGE''@|$(HAVE_COPY_FILE_RANGE)|g' \
               -e 's|@''HAVE_DUP3''@|$(HAVE_DUP3)|g' \
               -e 's|@''HAVE_EUIDACCESS''@|$(HAVE_EUIDACCESS)|g' \
+              -e 's|@''HAVE_EXECVPE''@|$(HAVE_EXECVPE)|g' \
               -e 's|@''HAVE_FACCESSAT''@|$(HAVE_FACCESSAT)|g' \
               -e 's|@''HAVE_FCHDIR''@|$(HAVE_FCHDIR)|g' \
               -e 's|@''HAVE_FCHOWNAT''@|$(HAVE_FCHOWNAT)|g' \
@@ -3505,6 +3609,13 @@ unistd.h: unistd.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H
               -e 's|@''REPLACE_CLOSE''@|$(REPLACE_CLOSE)|g' \
               -e 's|@''REPLACE_DUP''@|$(REPLACE_DUP)|g' \
               -e 's|@''REPLACE_DUP2''@|$(REPLACE_DUP2)|g' \
+              -e 's|@''REPLACE_EXECL''@|$(REPLACE_EXECL)|g' \
+              -e 's|@''REPLACE_EXECLE''@|$(REPLACE_EXECLE)|g' \
+              -e 's|@''REPLACE_EXECLP''@|$(REPLACE_EXECLP)|g' \
+              -e 's|@''REPLACE_EXECV''@|$(REPLACE_EXECV)|g' \
+              -e 's|@''REPLACE_EXECVE''@|$(REPLACE_EXECVE)|g' \
+              -e 's|@''REPLACE_EXECVP''@|$(REPLACE_EXECVP)|g' \
+              -e 's|@''REPLACE_EXECVPE''@|$(REPLACE_EXECVPE)|g' \
               -e 's|@''REPLACE_FACCESSAT''@|$(REPLACE_FACCESSAT)|g' \
               -e 's|@''REPLACE_FCHOWNAT''@|$(REPLACE_FCHOWNAT)|g' \
               -e 's|@''REPLACE_FTRUNCATE''@|$(REPLACE_FTRUNCATE)|g' \
diff --git a/lib/group-member.c b/lib/group-member.c
index d7ded6a1b0e..52159016eab 100644
--- a/lib/group-member.c
+++ b/lib/group-member.c
@@ -1,7 +1,7 @@
 /* group-member.c -- determine whether group id is in calling user's group list
 
-   Copyright (C) 1994, 1997-1998, 2003, 2005-2006, 2009-2021 Free
-   Software Foundation, Inc.
+   Copyright (C) 1994, 1997-1998, 2003, 2005-2006, 2009-2021 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
diff --git a/lib/idx.h b/lib/idx.h
index 22ac320b506..681c8c90f10 100644
--- a/lib/idx.h
+++ b/lib/idx.h
@@ -1,19 +1,20 @@
 /* A type for indices and sizes.
-
    Copyright (C) 2020-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
 
-   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, or (at your option)
-   any later version.
+   The GNU C Library 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,
+   The GNU C Library 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.
+   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 <https://www.gnu.org/licenses/>.  */
+   You should have received a copy of the GNU General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
 
 #ifndef _IDX_H
 #define _IDX_H
diff --git a/lib/malloc/scratch_buffer.h b/lib/malloc/scratch_buffer.h
index 6efca9ba3f4..26e306212d1 100644
--- a/lib/malloc/scratch_buffer.h
+++ b/lib/malloc/scratch_buffer.h
@@ -132,4 +132,20 @@ scratch_buffer_set_array_size (struct scratch_buffer *buffer,
                          (buffer, nelem, size));
 }
 
+/* Return a copy of *BUFFER's first SIZE bytes as a heap-allocated block,
+   deallocating *BUFFER if it was heap-allocated.  SIZE must be at
+   most *BUFFER's size.  Return NULL (setting errno) on memory
+   exhaustion.  */
+void *__libc_scratch_buffer_dupfree (struct scratch_buffer *buffer,
+                                     size_t size);
+libc_hidden_proto (__libc_scratch_buffer_dupfree)
+
+/* Alias for __libc_scratch_dupfree.  */
+static __always_inline void *
+scratch_buffer_dupfree (struct scratch_buffer *buffer, size_t size)
+{
+  void *r = __libc_scratch_buffer_dupfree (buffer, size);
+  return __glibc_likely (r != NULL) ? r : NULL;
+}
+
 #endif /* _SCRATCH_BUFFER_H */
diff --git a/lib/malloc/scratch_buffer_grow.c b/lib/malloc/scratch_buffer_grow.c
index e7606d81cd7..41befe3d65f 100644
--- a/lib/malloc/scratch_buffer_grow.c
+++ b/lib/malloc/scratch_buffer_grow.c
@@ -1,5 +1,5 @@
 /* Variable-sized buffer with on-stack default allocation.
-   Copyright (C) 2015-2021 Free Software Foundation, Inc.
+   Copyright (C) 2015-2020 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
diff --git a/lib/malloc/scratch_buffer_grow_preserve.c b/lib/malloc/scratch_buffer_grow_preserve.c
index 59f8c710001..aef232938d5 100644
--- a/lib/malloc/scratch_buffer_grow_preserve.c
+++ b/lib/malloc/scratch_buffer_grow_preserve.c
@@ -1,5 +1,5 @@
 /* Variable-sized buffer with on-stack default allocation.
-   Copyright (C) 2015-2021 Free Software Foundation, Inc.
+   Copyright (C) 2015-2020 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
diff --git a/lib/malloc/scratch_buffer_set_array_size.c b/lib/malloc/scratch_buffer_set_array_size.c
index e2b9f31211a..5f5e4c24f5a 100644
--- a/lib/malloc/scratch_buffer_set_array_size.c
+++ b/lib/malloc/scratch_buffer_set_array_size.c
@@ -1,5 +1,5 @@
 /* Variable-sized buffer with on-stack default allocation.
-   Copyright (C) 2015-2021 Free Software Foundation, Inc.
+   Copyright (C) 2015-2020 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
diff --git a/lib/md5.c b/lib/md5.c
index d103c133140..e7eeeaab03f 100644
--- a/lib/md5.c
+++ b/lib/md5.c
@@ -1,7 +1,7 @@
 /* Functions to compute MD5 message digest of files or memory blocks.
    according to the definition of MD5 in RFC 1321 from April 1992.
-   Copyright (C) 1995-1997, 1999-2001, 2005-2006, 2008-2021 Free
-   Software Foundation, Inc.
+   Copyright (C) 1995-1997, 1999-2001, 2005-2006, 2008-2021 Free Software
+   Foundation, Inc.
    This file is part of the GNU C Library.
 
    This program is free software; you can redistribute it and/or modify it
diff --git a/lib/md5.h b/lib/md5.h
index 9015b9a8671..aa4b0805d58 100644
--- a/lib/md5.h
+++ b/lib/md5.h
@@ -1,7 +1,7 @@
 /* Declaration of functions and data types used for MD5 sum computing
    library functions.
-   Copyright (C) 1995-1997, 1999-2001, 2004-2006, 2008-2021 Free
-   Software Foundation, Inc.
+   Copyright (C) 1995-1997, 1999-2001, 2004-2006, 2008-2021 Free Software
+   Foundation, Inc.
    This file is part of the GNU C Library.
 
    This program is free software; you can redistribute it and/or modify it
diff --git a/lib/memmem.c b/lib/memmem.c
index 5c35976ebce..87266fa87af 100644
--- a/lib/memmem.c
+++ b/lib/memmem.c
@@ -1,5 +1,5 @@
-/* Copyright (C) 1991-1994, 1996-1998, 2000, 2004, 2007-2021 Free
-   Software Foundation, Inc.
+/* Copyright (C) 1991-1994, 1996-1998, 2000, 2004, 2007-2021 Free Software
+   Foundation, Inc.
    This file is part of the GNU C Library.
 
    This program is free software; you can redistribute it and/or modify
diff --git a/lib/memrchr.c b/lib/memrchr.c
index 6608004fecb..dcd24fafc6e 100644
--- a/lib/memrchr.c
+++ b/lib/memrchr.c
@@ -1,7 +1,7 @@
 /* memrchr -- find the last occurrence of a byte in a memory block
 
-   Copyright (C) 1991, 1993, 1996-1997, 1999-2000, 2003-2021 Free
-   Software Foundation, Inc.
+   Copyright (C) 1991, 1993, 1996-1997, 1999-2000, 2003-2021 Free Software
+   Foundation, Inc.
 
    Based on strlen implementation by Torbjorn Granlund (tege@sics.se),
    with help from Dan Sahlin (dan@sics.se) and
diff --git a/lib/mktime-internal.h b/lib/mktime-internal.h
index 9c447bd7b05..b765a37ee34 100644
--- a/lib/mktime-internal.h
+++ b/lib/mktime-internal.h
@@ -1,5 +1,5 @@
 /* Internals of mktime and related functions
-   Copyright 2016-2021 Free Software Foundation, Inc.
+   Copyright 2016-2020 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Paul Eggert <eggert@cs.ucla.edu>.
 
diff --git a/lib/regex.c b/lib/regex.c
index f76a416b3b5..88173bb1052 100644
--- a/lib/regex.c
+++ b/lib/regex.c
@@ -1,5 +1,5 @@
 /* Extended regular expression matching and search library.
-   Copyright (C) 2002-2021 Free Software Foundation, Inc.
+   Copyright (C) 2002-2020 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
 
diff --git a/lib/regexec.c b/lib/regexec.c
index a75365f9073..395e37db591 100644
--- a/lib/regexec.c
+++ b/lib/regexec.c
@@ -1,5 +1,5 @@
 /* Extended regular expression matching and search library.
-   Copyright (C) 2002-2021 Free Software Foundation, Inc.
+   Copyright (C) 2002-2020 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
 
diff --git a/lib/sha1.c b/lib/sha1.c
index d7c2939da1d..612d46de827 100644
--- a/lib/sha1.c
+++ b/lib/sha1.c
@@ -1,8 +1,7 @@
 /* sha1.c - Functions to compute SHA1 message digest of files or
    memory blocks according to the NIST specification FIPS-180-1.
 
-   Copyright (C) 2000-2001, 2003-2006, 2008-2021 Free Software
-   Foundation, Inc.
+   Copyright (C) 2000-2001, 2003-2006, 2008-2021 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 the
diff --git a/lib/sig2str.c b/lib/sig2str.c
index bfce99c30c0..c2cc35d830c 100644
--- a/lib/sig2str.c
+++ b/lib/sig2str.c
@@ -1,7 +1,6 @@
 /* sig2str.c -- convert between signal names and numbers
 
-   Copyright (C) 2002, 2004, 2006, 2009-2021 Free Software Foundation,
-   Inc.
+   Copyright (C) 2002, 2004, 2006, 2009-2021 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
diff --git a/lib/stdio.in.h b/lib/stdio.in.h
index c7d7bbb4e42..a9308405052 100644
--- a/lib/stdio.in.h
+++ b/lib/stdio.in.h
@@ -229,27 +229,29 @@ _GL_WARN_ON_USE (fclose, "fclose is not always POSIX compliant - "
                  "use gnulib module fclose for portable POSIX compliance");
 #endif
 
+#if @GNULIB_MDA_FCLOSEALL@
 /* On native Windows, map 'fcloseall' to '_fcloseall', so that -loldnames is
    not required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::fcloseall on all platforms that have
    it.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef fcloseall
-#  define fcloseall _fcloseall
-# endif
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fcloseall
+#   define fcloseall _fcloseall
+#  endif
 _GL_CXXALIAS_MDA (fcloseall, int, (void));
-#else
-# if @HAVE_DECL_FCLOSEALL@
-#  if defined __FreeBSD__
+# else
+#  if @HAVE_DECL_FCLOSEALL@
+#   if defined __FreeBSD__
 _GL_CXXALIAS_SYS (fcloseall, void, (void));
-#  else
+#   else
 _GL_CXXALIAS_SYS (fcloseall, int, (void));
+#   endif
 #  endif
 # endif
-#endif
-#if (defined _WIN32 && !defined __CYGWIN__) || @HAVE_DECL_FCLOSEALL@
+# if (defined _WIN32 && !defined __CYGWIN__) || @HAVE_DECL_FCLOSEALL@
 _GL_CXXALIASWARN (fcloseall);
+# endif
 #endif
 
 #if @GNULIB_FDOPEN@
@@ -276,7 +278,7 @@ _GL_CXXALIASWARN (fdopen);
 /* Assume fdopen is always declared.  */
 _GL_WARN_ON_USE (fdopen, "fdopen on native Windows platforms is not POSIX compliant - "
                  "use gnulib module fdopen for portability");
-#else
+#elif @GNULIB_MDA_FDOPEN@
 /* On native Windows, map 'fdopen' to '_fdopen', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::fdopen always.  */
@@ -354,19 +356,21 @@ _GL_CXXALIASWARN (fgets);
 # endif
 #endif
 
+#if @GNULIB_MDA_FILENO@
 /* On native Windows, map 'fileno' to '_fileno', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::fileno always.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef fileno
-#  define fileno _fileno
-# endif
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fileno
+#   define fileno _fileno
+#  endif
 _GL_CXXALIAS_MDA (fileno, int, (FILE *restrict stream));
-#else
+# else
 _GL_CXXALIAS_SYS (fileno, int, (FILE *restrict stream));
-#endif
+# endif
 _GL_CXXALIASWARN (fileno);
+#endif
 
 #if @GNULIB_FOPEN@
 # if @REPLACE_FOPEN@
@@ -895,19 +899,21 @@ _GL_WARN_ON_USE (getline, "getline is unportable - "
 _GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
 #endif
 
+#if @GNULIB_MDA_GETW@
 /* On native Windows, map 'getw' to '_getw', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::getw always.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef getw
-#  define getw _getw
-# endif
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef getw
+#   define getw _getw
+#  endif
 _GL_CXXALIAS_MDA (getw, int, (FILE *restrict stream));
-#else
+# else
 _GL_CXXALIAS_SYS (getw, int, (FILE *restrict stream));
-#endif
+# endif
 _GL_CXXALIASWARN (getw);
+#endif
 
 #if @GNULIB_OBSTACK_PRINTF@ || @GNULIB_OBSTACK_PRINTF_POSIX@
 struct obstack;
@@ -1122,19 +1128,21 @@ _GL_CXXALIASWARN (puts);
 # endif
 #endif
 
+#if @GNULIB_MDA_PUTW@
 /* On native Windows, map 'putw' to '_putw', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::putw always.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef putw
-#  define putw _putw
-# endif
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef putw
+#   define putw _putw
+#  endif
 _GL_CXXALIAS_MDA (putw, int, (int w, FILE *restrict stream));
-#else
+# else
 _GL_CXXALIAS_SYS (putw, int, (int w, FILE *restrict stream));
-#endif
+# endif
 _GL_CXXALIASWARN (putw);
+#endif
 
 #if @GNULIB_REMOVE@
 # if @REPLACE_REMOVE@
@@ -1315,19 +1323,21 @@ _GL_WARN_ON_USE (sprintf, "sprintf is not always POSIX compliant - "
                  "POSIX compliance");
 #endif
 
+#if @GNULIB_MDA_TEMPNAM@
 /* On native Windows, map 'tempnam' to '_tempnam', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::tempnam always.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef tempnam
-#  define tempnam _tempnam
-# endif
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef tempnam
+#   define tempnam _tempnam
+#  endif
 _GL_CXXALIAS_MDA (tempnam, char *, (const char *dir, const char *prefix));
-#else
+# else
 _GL_CXXALIAS_SYS (tempnam, char *, (const char *dir, const char *prefix));
-#endif
+# endif
 _GL_CXXALIASWARN (tempnam);
+#endif
 
 #if @GNULIB_TMPFILE@
 # if @REPLACE_TMPFILE@
diff --git a/lib/stdlib.in.h b/lib/stdlib.in.h
index 9217ebd4ab0..49fc44e14a1 100644
--- a/lib/stdlib.in.h
+++ b/lib/stdlib.in.h
@@ -1,7 +1,6 @@
 /* A GNU-like <stdlib.h>.
 
-   Copyright (C) 1995, 2001-2004, 2006-2021 Free Software Foundation,
-   Inc.
+   Copyright (C) 1995, 2001-2004, 2006-2021 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
@@ -243,46 +242,50 @@ _GL_WARN_ON_USE (canonicalize_file_name,
 # endif
 #endif
 
+#if @GNULIB_MDA_ECVT@
 /* On native Windows, map 'ecvt' to '_ecvt', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::ecvt on all platforms that have
    it.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef ecvt
-#  define ecvt _ecvt
-# endif
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef ecvt
+#   define ecvt _ecvt
+#  endif
 _GL_CXXALIAS_MDA (ecvt, char *,
                   (double number, int ndigits, int *decptp, int *signp));
-#else
-# if @HAVE_DECL_ECVT@
+# else
+#  if @HAVE_DECL_ECVT@
 _GL_CXXALIAS_SYS (ecvt, char *,
                   (double number, int ndigits, int *decptp, int *signp));
+#  endif
 # endif
-#endif
-#if (defined _WIN32 && !defined __CYGWIN__) || @HAVE_DECL_ECVT@
+# if (defined _WIN32 && !defined __CYGWIN__) || @HAVE_DECL_ECVT@
 _GL_CXXALIASWARN (ecvt);
+# endif
 #endif
 
+#if @GNULIB_MDA_FCVT@
 /* On native Windows, map 'fcvt' to '_fcvt', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::fcvt on all platforms that have
    it.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef fcvt
-#  define fcvt _fcvt
-# endif
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef fcvt
+#   define fcvt _fcvt
+#  endif
 _GL_CXXALIAS_MDA (fcvt, char *,
                   (double number, int ndigits, int *decptp, int *signp));
-#else
-# if @HAVE_DECL_FCVT@
+# else
+#  if @HAVE_DECL_FCVT@
 _GL_CXXALIAS_SYS (fcvt, char *,
                   (double number, int ndigits, int *decptp, int *signp));
+#  endif
 # endif
-#endif
-#if (defined _WIN32 && !defined __CYGWIN__) || @HAVE_DECL_FCVT@
+# if (defined _WIN32 && !defined __CYGWIN__) || @HAVE_DECL_FCVT@
 _GL_CXXALIASWARN (fcvt);
+# endif
 #endif
 
 #if @GNULIB_FREE_POSIX@
@@ -306,23 +309,25 @@ _GL_WARN_ON_USE (free, "free is not future POSIX compliant everywhere - "
                  "use gnulib module free for portability");
 #endif
 
+#if @GNULIB_MDA_GCVT@
 /* On native Windows, map 'gcvt' to '_gcvt', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::gcvt on all platforms that have
    it.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef gcvt
-#  define gcvt _gcvt
-# endif
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef gcvt
+#   define gcvt _gcvt
+#  endif
 _GL_CXXALIAS_MDA (gcvt, char *, (double number, int ndigits, char *buf));
-#else
-# if @HAVE_DECL_GCVT@
+# else
+#  if @HAVE_DECL_GCVT@
 _GL_CXXALIAS_SYS (gcvt, char *, (double number, int ndigits, char *buf));
+#  endif
 # endif
-#endif
-#if (defined _WIN32 && !defined __CYGWIN__) || @HAVE_DECL_GCVT@
+# if (defined _WIN32 && !defined __CYGWIN__) || @HAVE_DECL_GCVT@
 _GL_CXXALIASWARN (gcvt);
+# endif
 #endif
 
 #if @GNULIB_GETLOADAVG@
@@ -576,19 +581,21 @@ _GL_WARN_ON_USE (mkstemps, "mkstemps is unportable - "
 # endif
 #endif
 
+#if @GNULIB_MDA_MKTEMP@
 /* On native Windows, map 'mktemp' to '_mktemp', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::mktemp always.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef mktemp
-#  define mktemp _mktemp
-# endif
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mktemp
+#   define mktemp _mktemp
+#  endif
 _GL_CXXALIAS_MDA (mktemp, char *, (char * /*template*/));
-#else
+# else
 _GL_CXXALIAS_SYS (mktemp, char *, (char * /*template*/));
-#endif
+# endif
 _GL_CXXALIASWARN (mktemp);
+#endif
 
 /* Allocate memory with indefinite extent and specified alignment.  */
 #if @GNULIB_POSIX_MEMALIGN@
@@ -707,7 +714,7 @@ _GL_CXXALIAS_MDA (putenv, int, (char *string));
 _GL_CXXALIAS_SYS (putenv, int, (char *string));
 # endif
 _GL_CXXALIASWARN (putenv);
-#else
+#elif @GNULIB_MDA_PUTENV@
 /* On native Windows, map 'putenv' to '_putenv', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::putenv always.  */
diff --git a/lib/string.in.h b/lib/string.in.h
index 4625c611bf3..9f68e77c767 100644
--- a/lib/string.in.h
+++ b/lib/string.in.h
@@ -123,21 +123,23 @@ _GL_WARN_ON_USE (ffsll, "ffsll is not portable - use the ffsll module");
 #endif
 
 
+#if @GNULIB_MDA_MEMCCPY@
 /* On native Windows, map 'memccpy' to '_memccpy', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::memccpy always.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef memccpy
-#  define memccpy _memccpy
-# endif
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef memccpy
+#   define memccpy _memccpy
+#  endif
 _GL_CXXALIAS_MDA (memccpy, void *,
                   (void *dest, const void *src, int c, size_t n));
-#else
+# else
 _GL_CXXALIAS_SYS (memccpy, void *,
                   (void *dest, const void *src, int c, size_t n));
-#endif
+# endif
 _GL_CXXALIASWARN (memccpy);
+#endif
 
 
 /* Return the first instance of C within N bytes of S, or NULL.  */
@@ -425,7 +427,7 @@ _GL_CXXALIASWARN (strdup);
 _GL_WARN_ON_USE (strdup, "strdup is unportable - "
                  "use gnulib module strdup for portability");
 # endif
-#else
+#elif @GNULIB_MDA_STRDUP@
 /* On native Windows, map 'creat' to '_creat', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::creat always.  */
diff --git a/lib/strtoimax.c b/lib/strtoimax.c
index db2c553738e..37a25c31d44 100644
--- a/lib/strtoimax.c
+++ b/lib/strtoimax.c
@@ -1,7 +1,7 @@
 /* Convert string representation of a number into an intmax_t value.
 
-   Copyright (C) 1999, 2001-2004, 2006, 2009-2021 Free Software
-   Foundation, Inc.
+   Copyright (C) 1999, 2001-2004, 2006, 2009-2021 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
diff --git a/lib/strtol.c b/lib/strtol.c
index d0cf7949f62..2f2159b6231 100644
--- a/lib/strtol.c
+++ b/lib/strtol.c
@@ -1,7 +1,7 @@
 /* Convert string representation of a number into an integer value.
 
-   Copyright (C) 1991-1992, 1994-1999, 2003, 2005-2007, 2009-2021 Free
-   Software Foundation, Inc.
+   Copyright (C) 1991-1992, 1994-1999, 2003, 2005-2007, 2009-2021 Free Software
+   Foundation, Inc.
 
    NOTE: The canonical source of this file is maintained with the GNU C
    Library.  Bugs can be reported to bug-glibc@gnu.org.
diff --git a/lib/strtoll.c b/lib/strtoll.c
index bb71c53a1de..30daefc50f6 100644
--- a/lib/strtoll.c
+++ b/lib/strtoll.c
@@ -1,6 +1,6 @@
 /* Function to parse a 'long long int' from text.
-   Copyright (C) 1995-1997, 1999, 2001, 2009-2021 Free Software
-   Foundation, Inc.
+   Copyright (C) 1995-1997, 1999, 2001, 2009-2021 Free Software Foundation,
+   Inc.
    This file is part of the GNU C Library.
 
    This program is free software: you can redistribute it and/or modify
diff --git a/lib/sys_stat.in.h b/lib/sys_stat.in.h
index 4e7b212a611..ccdb5cbd143 100644
--- a/lib/sys_stat.in.h
+++ b/lib/sys_stat.in.h
@@ -391,20 +391,22 @@ struct stat
 #endif
 
 
+#if @GNULIB_MDA_CHMOD@
 /* On native Windows, map 'chmod' to '_chmod', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::chmod always.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef chmod
-#  define chmod _chmod
-# endif
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef chmod
+#   define chmod _chmod
+#  endif
 /* Need to cast, because in mingw the last argument is 'int mode'.  */
 _GL_CXXALIAS_MDA_CAST (chmod, int, (const char *filename, mode_t mode));
-#else
+# else
 _GL_CXXALIAS_SYS (chmod, int, (const char *filename, mode_t mode));
-#endif
+# endif
 _GL_CXXALIASWARN (chmod);
+#endif
 
 
 #if @GNULIB_FCHMODAT@
@@ -606,21 +608,20 @@ _GL_WARN_ON_USE (lstat, "lstat is unportable - "
 #endif
 
 
-#if @REPLACE_MKDIR@
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef mkdir
-#  define mkdir rpl_mkdir
-# endif
+#if @GNULIB_MKDIR@
+# if @REPLACE_MKDIR@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mkdir
+#   define mkdir rpl_mkdir
+#  endif
 _GL_FUNCDECL_RPL (mkdir, int, (char const *name, mode_t mode)
-                              _GL_ARG_NONNULL ((1)));
+                               _GL_ARG_NONNULL ((1)));
 _GL_CXXALIAS_RPL (mkdir, int, (char const *name, mode_t mode));
-#else
+# elif defined _WIN32 && !defined __CYGWIN__
 /* mingw's _mkdir() function has 1 argument, but we pass 2 arguments.
    Additionally, it declares _mkdir (and depending on compile flags, an
    alias mkdir), only in the nonstandard includes <direct.h> and <io.h>,
    which are included above.  */
-# if defined _WIN32 && ! defined __CYGWIN__
-
 #  if !GNULIB_defined_rpl_mkdir
 static int
 rpl_mkdir (char const *name, mode_t mode)
@@ -629,16 +630,44 @@ rpl_mkdir (char const *name, mode_t mode)
 }
 #   define GNULIB_defined_rpl_mkdir 1
 #  endif
-
 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mkdir
+#   define mkdir rpl_mkdir
+#  endif
+_GL_CXXALIAS_RPL (mkdir, int, (char const *name, mode_t mode));
+# else
+_GL_CXXALIAS_SYS (mkdir, int, (char const *name, mode_t mode));
+# endif
+_GL_CXXALIASWARN (mkdir);
+#elif defined GNULIB_POSIXCHECK
+# undef mkdir
+# if HAVE_RAW_DECL_MKDIR
+_GL_WARN_ON_USE (mkdir, "mkdir does not always support two parameters - "
+                 "use gnulib module mkdir for portability");
+# endif
+#elif @GNULIB_MDA_MKDIR@
+/* On native Windows, map 'mkdir' to '_mkdir', so that -loldnames is not
+   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
+   platforms by defining GNULIB_NAMESPACE::mkdir always.  */
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !GNULIB_defined_rpl_mkdir
+static int
+rpl_mkdir (char const *name, mode_t mode)
+{
+  return _mkdir (name);
+}
+#   define GNULIB_defined_rpl_mkdir 1
+#  endif
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef mkdir
 #   define mkdir rpl_mkdir
 #  endif
 _GL_CXXALIAS_RPL (mkdir, int, (char const *name, mode_t mode));
 # else
 _GL_CXXALIAS_SYS (mkdir, int, (char const *name, mode_t mode));
 # endif
-#endif
 _GL_CXXALIASWARN (mkdir);
+#endif
 
 
 #if @GNULIB_MKDIRAT@
@@ -818,20 +847,22 @@ _GL_WARN_ON_USE (stat, "stat is unportable - "
 #endif
 
 
+#if @GNULIB_MDA_UMASK@
 /* On native Windows, map 'umask' to '_umask', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::umask always.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef umask
-#  define umask _umask
-# endif
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef umask
+#   define umask _umask
+#  endif
 /* Need to cast, because in mingw the last argument is 'int mode'.  */
 _GL_CXXALIAS_MDA_CAST (umask, mode_t, (mode_t mask));
-#else
+# else
 _GL_CXXALIAS_SYS (umask, mode_t, (mode_t mask));
-#endif
+# endif
 _GL_CXXALIASWARN (umask);
+#endif
 
 
 #if @GNULIB_UTIMENSAT@
diff --git a/lib/time.in.h b/lib/time.in.h
index ed44997e382..958dc0bd292 100644
--- a/lib/time.in.h
+++ b/lib/time.in.h
@@ -145,7 +145,7 @@ _GL_CXXALIAS_MDA (tzset, void, (void));
 _GL_CXXALIAS_SYS (tzset, void, (void));
 #  endif
 _GL_CXXALIASWARN (tzset);
-# else
+# elif @GNULIB_MDA_TZSET@
 /* On native Windows, map 'tzset' to '_tzset', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::tzset always.  */
diff --git a/lib/time_r.c b/lib/time_r.c
index 446a30f9f06..d9089868704 100644
--- a/lib/time_r.c
+++ b/lib/time_r.c
@@ -1,7 +1,6 @@
 /* Reentrant time functions like localtime_r.
 
-   Copyright (C) 2003, 2006-2007, 2010-2021 Free Software Foundation,
-   Inc.
+   Copyright (C) 2003, 2006-2007, 2010-2021 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
diff --git a/lib/timegm.c b/lib/timegm.c
index e4127e71c0b..fa30943084d 100644
--- a/lib/timegm.c
+++ b/lib/timegm.c
@@ -1,6 +1,6 @@
 /* Convert UTC calendar time to simple time.  Like mktime but assumes UTC.
 
-   Copyright (C) 1994-2021 Free Software Foundation, Inc.
+   Copyright (C) 1994-2020 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
diff --git a/lib/unistd.in.h b/lib/unistd.in.h
index b5e7aaef7d6..5e9b47d981e 100644
--- a/lib/unistd.in.h
+++ b/lib/unistd.in.h
@@ -287,7 +287,7 @@ _GL_WARN_ON_USE (access, "access does not always support X_OK - "
                  "also, this function is a security risk - "
                  "use the gnulib module faccessat instead");
 # endif
-#else
+#elif @GNULIB_MDA_ACCESS@
 /* On native Windows, map 'access' to '_access', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::access always.  */
@@ -321,7 +321,7 @@ _GL_CXXALIASWARN (chdir);
 _GL_WARN_ON_USE (chown, "chdir is not always in <unistd.h> - "
                  "use gnulib module chdir for portability");
 # endif
-#else
+#elif @GNULIB_MDA_CHDIR@
 /* On native Windows, map 'chdir' to '_chdir', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::chdir always.  */
@@ -397,7 +397,7 @@ _GL_CXXALIASWARN (close);
 /* Assume close is always declared.  */
 _GL_WARN_ON_USE (close, "close does not portably work on sockets - "
                  "use gnulib module close for portability");
-#else
+#elif @GNULIB_MDA_CLOSE@
 /* On native Windows, map 'close' to '_close', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::close always.  */
@@ -456,7 +456,7 @@ _GL_CXXALIASWARN (dup);
 _GL_WARN_ON_USE (dup, "dup is unportable - "
                  "use gnulib module dup for portability");
 # endif
-#else
+#elif @GNULIB_MDA_DUP@
 /* On native Windows, map 'dup' to '_dup', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::dup always.  */
@@ -501,7 +501,7 @@ _GL_CXXALIASWARN (dup2);
 _GL_WARN_ON_USE (dup2, "dup2 is unportable - "
                  "use gnulib module dup2 for portability");
 # endif
-#else
+#elif @GNULIB_MDA_DUP2@
 /* On native Windows, map 'dup2' to '_dup2', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::dup2 always.  */
@@ -615,116 +615,279 @@ _GL_WARN_ON_USE (euidaccess, "euidaccess is unportable - "
 #endif
 
 
+#if @GNULIB_EXECL@
+# if @REPLACE_EXECL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execl
+#   define execl rpl_execl
+#  endif
+_GL_FUNCDECL_RPL (execl, int, (const char *program, const char *arg, ...)
+                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (execl, int, (const char *program, const char *arg, ...));
+# else
+_GL_CXXALIAS_SYS (execl, int, (const char *program, const char *arg, ...));
+# endif
+_GL_CXXALIASWARN (execl);
+#elif defined GNULIB_POSIXCHECK
+# undef execl
+# if HAVE_RAW_DECL_EXECL
+_GL_WARN_ON_USE (execl, "execl behaves very differently on mingw - "
+                 "use gnulib module execl for portability");
+# endif
+#elif @GNULIB_MDA_EXECL@
 /* On native Windows, map 'execl' to '_execl', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::execl always.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef execl
-#  define execl _execl
-# endif
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execl
+#   define execl _execl
+#  endif
 _GL_CXXALIAS_MDA (execl, intptr_t, (const char *program, const char *arg, ...));
-#else
+# else
 _GL_CXXALIAS_SYS (execl, int, (const char *program, const char *arg, ...));
-#endif
+# endif
 _GL_CXXALIASWARN (execl);
+#endif
 
+#if @GNULIB_EXECLE@
+# if @REPLACE_EXECLE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execle
+#   define execle rpl_execle
+#  endif
+_GL_FUNCDECL_RPL (execle, int, (const char *program, const char *arg, ...)
+                               _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (execle, int, (const char *program, const char *arg, ...));
+# else
+_GL_CXXALIAS_SYS (execle, int, (const char *program, const char *arg, ...));
+# endif
+_GL_CXXALIASWARN (execle);
+#elif defined GNULIB_POSIXCHECK
+# undef execle
+# if HAVE_RAW_DECL_EXECLE
+_GL_WARN_ON_USE (execle, "execle behaves very differently on mingw - "
+                 "use gnulib module execle for portability");
+# endif
+#elif @GNULIB_MDA_EXECLE@
 /* On native Windows, map 'execle' to '_execle', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::execle always.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef execle
-#  define execle _execle
-# endif
-_GL_CXXALIAS_MDA (execle, intptr_t, (const char *program, const char *arg, ...));
-#else
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execle
+#   define execle _execle
+#  endif
+_GL_CXXALIAS_MDA (execle, intptr_t,
+                  (const char *program, const char *arg, ...));
+# else
 _GL_CXXALIAS_SYS (execle, int, (const char *program, const char *arg, ...));
-#endif
+# endif
 _GL_CXXALIASWARN (execle);
+#endif
 
+#if @GNULIB_EXECLP@
+# if @REPLACE_EXECLP@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execlp
+#   define execlp rpl_execlp
+#  endif
+_GL_FUNCDECL_RPL (execlp, int, (const char *program, const char *arg, ...)
+                               _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (execlp, int, (const char *program, const char *arg, ...));
+# else
+_GL_CXXALIAS_SYS (execlp, int, (const char *program, const char *arg, ...));
+# endif
+_GL_CXXALIASWARN (execlp);
+#elif defined GNULIB_POSIXCHECK
+# undef execlp
+# if HAVE_RAW_DECL_EXECLP
+_GL_WARN_ON_USE (execlp, "execlp behaves very differently on mingw - "
+                 "use gnulib module execlp for portability");
+# endif
+#elif @GNULIB_MDA_EXECLP@
 /* On native Windows, map 'execlp' to '_execlp', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::execlp always.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef execlp
-#  define execlp _execlp
-# endif
-_GL_CXXALIAS_MDA (execlp, intptr_t, (const char *program, const char *arg, ...));
-#else
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execlp
+#   define execlp _execlp
+#  endif
+_GL_CXXALIAS_MDA (execlp, intptr_t,
+                  (const char *program, const char *arg, ...));
+# else
 _GL_CXXALIAS_SYS (execlp, int, (const char *program, const char *arg, ...));
-#endif
+# endif
 _GL_CXXALIASWARN (execlp);
+#endif
 
 
+#if @GNULIB_EXECV@
+# if @REPLACE_EXECV@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execv
+#   define execv rpl_execv
+#  endif
+_GL_FUNCDECL_RPL (execv, int, (const char *program, char * const *argv)
+                              _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (execv, int, (const char *program, char * const *argv));
+# else
+_GL_CXXALIAS_SYS (execv, int, (const char *program, char * const *argv));
+# endif
+_GL_CXXALIASWARN (execv);
+#elif defined GNULIB_POSIXCHECK
+# undef execv
+# if HAVE_RAW_DECL_EXECV
+_GL_WARN_ON_USE (execv, "execv behaves very differently on mingw - "
+                 "use gnulib module execv for portability");
+# endif
+#elif @GNULIB_MDA_EXECV@
 /* On native Windows, map 'execv' to '_execv', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::execv always.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef execv
-#  define execv _execv
-# endif
-_GL_CXXALIAS_MDA (execv, intptr_t,
-                  (const char *program, const char * const *argv));
-#else
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execv
+#   define execv _execv
+#  endif
+_GL_CXXALIAS_MDA_CAST (execv, intptr_t,
+                       (const char *program, char * const *argv));
+# else
 _GL_CXXALIAS_SYS (execv, int, (const char *program, char * const *argv));
-#endif
+# endif
 _GL_CXXALIASWARN (execv);
+#endif
 
+#if @GNULIB_EXECVE@
+# if @REPLACE_EXECVE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execve
+#   define execve rpl_execve
+#  endif
+_GL_FUNCDECL_RPL (execve, int,
+                  (const char *program, char * const *argv, char * const *env)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (execve, int,
+                  (const char *program, char * const *argv, char * const *env));
+# else
+_GL_CXXALIAS_SYS (execve, int,
+                  (const char *program, char * const *argv, char * const *env));
+# endif
+_GL_CXXALIASWARN (execve);
+#elif defined GNULIB_POSIXCHECK
+# undef execve
+# if HAVE_RAW_DECL_EXECVE
+_GL_WARN_ON_USE (execve, "execve behaves very differently on mingw - "
+                 "use gnulib module execve for portability");
+# endif
+#elif @GNULIB_MDA_EXECVE@
 /* On native Windows, map 'execve' to '_execve', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::execve always.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef execve
-#  define execve _execve
-# endif
-_GL_CXXALIAS_MDA (execve, intptr_t,
-                  (const char *program, const char * const *argv,
-                   const char * const *env));
-#else
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execve
+#   define execve _execve
+#  endif
+_GL_CXXALIAS_MDA_CAST (execve, intptr_t,
+                       (const char *program, char * const *argv,
+                        char * const *env));
+# else
 _GL_CXXALIAS_SYS (execve, int,
                   (const char *program, char * const *argv, char * const *env));
-#endif
+# endif
 _GL_CXXALIASWARN (execve);
+#endif
 
+#if @GNULIB_EXECVP@
+# if @REPLACE_EXECVP@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execvp
+#   define execvp rpl_execvp
+#  endif
+_GL_FUNCDECL_RPL (execvp, int, (const char *program, char * const *argv)
+                               _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (execvp, int, (const char *program, char * const *argv));
+# else
+_GL_CXXALIAS_SYS (execvp, int, (const char *program, char * const *argv));
+# endif
+_GL_CXXALIASWARN (execvp);
+#elif defined GNULIB_POSIXCHECK
+# undef execvp
+# if HAVE_RAW_DECL_EXECVP
+_GL_WARN_ON_USE (execvp, "execvp behaves very differently on mingw - "
+                 "use gnulib module execvp for portability");
+# endif
+#elif @GNULIB_MDA_EXECVP@
 /* On native Windows, map 'execvp' to '_execvp', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::execvp always.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef execvp
-#  define execvp _execvp
-# endif
-_GL_CXXALIAS_MDA (execvp, intptr_t,
-                  (const char *program, const char * const *argv));
-#else
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execvp
+#   define execvp _execvp
+#  endif
+_GL_CXXALIAS_MDA_CAST (execvp, intptr_t,
+                       (const char *program, char * const *argv));
+# else
 _GL_CXXALIAS_SYS (execvp, int, (const char *program, char * const *argv));
-#endif
+# endif
 _GL_CXXALIASWARN (execvp);
+#endif
 
+#if @GNULIB_EXECVPE@
+# if @REPLACE_EXECVPE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execvpe
+#   define execvpe rpl_execvpe
+#  endif
+_GL_FUNCDECL_RPL (execvpe, int,
+                  (const char *program, char * const *argv, char * const *env)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (execvpe, int,
+                  (const char *program, char * const *argv, char * const *env));
+# else
+#  if !@HAVE_DECL_EXECVPE@
+_GL_FUNCDECL_SYS (execvpe, int,
+                  (const char *program, char * const *argv, char * const *env)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (execvpe, int,
+                  (const char *program, char * const *argv, char * const *env));
+# endif
+_GL_CXXALIASWARN (execvpe);
+#elif defined GNULIB_POSIXCHECK
+# undef execvpe
+# if HAVE_RAW_DECL_EXECVPE
+_GL_WARN_ON_USE (execvpe, "execvpe behaves very differently on mingw - "
+                 "use gnulib module execvpe for portability");
+# endif
+#elif @GNULIB_MDA_EXECVPE@
 /* On native Windows, map 'execvpe' to '_execvpe', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::execvpe on all platforms that have
    it.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef execvpe
-#  define execvpe _execvpe
-# endif
-_GL_CXXALIAS_MDA (execvpe, intptr_t,
-                  (const char *program, const char * const *argv,
-                   const char * const *env));
-#else
-# if @HAVE_DECL_EXECVPE@
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef execvpe
+#   define execvpe _execvpe
+#  endif
+_GL_CXXALIAS_MDA_CAST (execvpe, intptr_t,
+                       (const char *program, char * const *argv,
+                        char * const *env));
+# elif @HAVE_EXECVPE@
+#  if !@HAVE_DECL_EXECVPE@
+_GL_FUNCDECL_SYS (execvpe, int,
+                  (const char *program, char * const *argv, char * const *env)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
 _GL_CXXALIAS_SYS (execvpe, int,
                   (const char *program, char * const *argv, char * const *env));
 # endif
-#endif
-#if (defined _WIN32 && !defined __CYGWIN__) || @HAVE_DECL_EXECVPE@
+# if (defined _WIN32 && !defined __CYGWIN__) || @HAVE_EXECVPE@
 _GL_CXXALIASWARN (execvpe);
+# endif
 #endif
 
 
@@ -815,7 +978,7 @@ _GL_CXXALIASWARN (fchownat);
 # undef fchownat
 # if HAVE_RAW_DECL_FCHOWNAT
 _GL_WARN_ON_USE (fchownat, "fchownat is not portable - "
-                 "use gnulib module openat for portability");
+                 "use gnulib module fchownat for portability");
 # endif
 #endif
 
@@ -921,7 +1084,7 @@ _GL_CXXALIASWARN (getcwd);
 _GL_WARN_ON_USE (getcwd, "getcwd is unportable - "
                  "use gnulib module getcwd for portability");
 # endif
-#else
+#elif @GNULIB_MDA_GETCWD@
 /* On native Windows, map 'getcwd' to '_getcwd', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::getcwd always.  */
@@ -1271,19 +1434,21 @@ _GL_WARN_ON_USE (getpass, "getpass is unportable - "
 #endif
 
 
+#if @GNULIB_MDA_GETPID@
 /* On native Windows, map 'getpid' to '_getpid', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::getpid always.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef getpid
-#  define getpid _getpid
-# endif
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef getpid
+#   define getpid _getpid
+#  endif
 _GL_CXXALIAS_MDA (getpid, int, (void));
-#else
+# else
 _GL_CXXALIAS_SYS (getpid, pid_t, (void));
-#endif
+# endif
 _GL_CXXALIASWARN (getpid);
+#endif
 
 
 #if @GNULIB_GETUSERSHELL@
@@ -1374,7 +1539,7 @@ _GL_CXXALIASWARN (isatty);
 _GL_WARN_ON_USE (isatty, "isatty has portability problems on native Windows - "
                  "use gnulib module isatty for portability");
 # endif
-#else
+#elif @GNULIB_MDA_ISATTY@
 /* On native Windows, map 'isatty' to '_isatty', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::isatty always.  */
@@ -1515,7 +1680,7 @@ _GL_CXXALIASWARN (lseek);
 _GL_WARN_ON_USE (lseek, "lseek does not fail with ESPIPE on pipes on some "
                  "systems - use gnulib module lseek for portability");
 # endif
-#else
+#elif @GNULIB_MDA_LSEEK@
 /* On native Windows, map 'lseek' to '_lseek', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::lseek always.  */
@@ -1671,7 +1836,7 @@ _GL_CXXALIAS_MDA (read, ssize_t, (int fd, void *buf, size_t count));
 _GL_CXXALIAS_SYS (read, ssize_t, (int fd, void *buf, size_t count));
 # endif
 _GL_CXXALIASWARN (read);
-#else
+#elif @GNULIB_MDA_READ@
 /* On native Windows, map 'read' to '_read', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::read always.  */
@@ -1787,7 +1952,7 @@ _GL_CXXALIASWARN (rmdir);
 _GL_WARN_ON_USE (rmdir, "rmdir is unportable - "
                  "use gnulib module rmdir for portability");
 # endif
-#else
+#elif @GNULIB_MDA_RMDIR@
 /* On native Windows, map 'rmdir' to '_rmdir', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::rmdir always.  */
@@ -1859,19 +2024,21 @@ _GL_WARN_ON_USE (sleep, "sleep is unportable - "
 #endif
 
 
+#if @GNULIB_MDA_SWAB@
 /* On native Windows, map 'swab' to '_swab', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::creat always.  */
-#if defined _WIN32 && !defined __CYGWIN__
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef swab
-#  define swab _swab
-# endif
+# if defined _WIN32 && !defined __CYGWIN__
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef swab
+#   define swab _swab
+#  endif
 _GL_CXXALIAS_MDA (swab, void, (char *from, char *to, int n));
-#else
+# else
 _GL_CXXALIAS_SYS (swab, void, (const void *from, void *to, ssize_t n));
-#endif
+# endif
 _GL_CXXALIASWARN (swab);
+#endif
 
 
 #if @GNULIB_SYMLINK@
@@ -2014,7 +2181,7 @@ _GL_CXXALIASWARN (unlink);
 _GL_WARN_ON_USE (unlink, "unlink is not portable - "
                  "use gnulib module unlink for portability");
 # endif
-#else
+#elif @GNULIB_MDA_UNLINK@
 /* On native Windows, map 'unlink' to '_unlink', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::unlink always.  */
@@ -2052,7 +2219,7 @@ _GL_CXXALIASWARN (unlinkat);
 # undef unlinkat
 # if HAVE_RAW_DECL_UNLINKAT
 _GL_WARN_ON_USE (unlinkat, "unlinkat is not portable - "
-                 "use gnulib module openat for portability");
+                 "use gnulib module unlinkat for portability");
 # endif
 #endif
 
@@ -2109,7 +2276,7 @@ _GL_CXXALIAS_MDA (write, ssize_t, (int fd, const void *buf, size_t count));
 _GL_CXXALIAS_SYS (write, ssize_t, (int fd, const void *buf, size_t count));
 # endif
 _GL_CXXALIASWARN (write);
-#else
+#elif @GNULIB_MDA_WRITE@
 /* On native Windows, map 'write' to '_write', so that -loldnames is not
    required.  In C++ with GNULIB_NAMESPACE, avoid differences between
    platforms by defining GNULIB_NAMESPACE::write always.  */
diff --git a/lib/xalloc-oversized.h b/lib/xalloc-oversized.h
index 3550cab846c..53daf59663e 100644
--- a/lib/xalloc-oversized.h
+++ b/lib/xalloc-oversized.h
@@ -1,7 +1,6 @@
 /* xalloc-oversized.h -- memory allocation size checking
 
-   Copyright (C) 1990-2000, 2003-2004, 2006-2021 Free Software
-   Foundation, Inc.
+   Copyright (C) 1990-2000, 2003-2004, 2006-2021 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