85 files changed, 217 insertions, 258 deletions

diff --git a/build-aux/config.guess b/build-aux/config.guess
index 4c8498faf3e..95b16c7747a 100755
--- a/build-aux/config.guess
+++ b/build-aux/config.guess
@@ -1,8 +1,8 @@
 #! /bin/sh
 # Attempt to guess a canonical system name.
-#   Copyright 1992-2020 Free Software Foundation, Inc.
+#   Copyright 1992-2019 Free Software Foundation, Inc.
 
-timestamp='2019-09-10'
+timestamp='2019-12-21'
 
 # 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
@@ -99,6 +99,8 @@ tmp=
 trap 'test -z "$tmp" || rm -fr "$tmp"' 0 1 2 13 15
 
 set_cc_for_build() {
+    # prevent multiple calls if $tmp is already set
+    test "$tmp" && return 0
     : "${TMPDIR=/tmp}"
     # shellcheck disable=SC2039
     { tmp=`(umask 077 && mktemp -d "$TMPDIR/cgXXXXXX") 2>/dev/null` && test -n "$tmp" && test -d "$tmp" ; } ||
@@ -924,7 +926,7 @@ EOF
         echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
         exit ;;
     alpha:Linux:*:*)
-        case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' < /proc/cpuinfo` in
+        case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' /proc/cpuinfo 2>/dev/null` in
           EV5)   UNAME_MACHINE=alphaev5 ;;
           EV56)  UNAME_MACHINE=alphaev56 ;;
           PCA56) UNAME_MACHINE=alphapca56 ;;
diff --git a/build-aux/config.sub b/build-aux/config.sub
index df031b3c853..0f2234c174d 100755
--- a/build-aux/config.sub
+++ b/build-aux/config.sub
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Configuration validation subroutine script.
-#   Copyright 1992-2020 Free Software Foundation, Inc.
+#   Copyright 1992-2019 Free Software Foundation, Inc.
 
 timestamp='2019-06-30'
 
diff --git a/doc/misc/texinfo.tex b/doc/misc/texinfo.tex
index 6d9d7113f77..1ea515b2ae4 100644
--- a/doc/misc/texinfo.tex
+++ b/doc/misc/texinfo.tex
@@ -5,7 +5,7 @@
 %
 \def\texinfoversion{2019-09-24.13}
 %
-% Copyright 1985--1986, 1988, 1990--2020 Free Software Foundation, Inc.
+% Copyright 1985, 1986, 1988, 1990-2019 Free Software Foundation, Inc.
 %
 % This texinfo.tex file is free software: you can redistribute it and/or
 % modify it under the terms of the GNU General Public License as
@@ -7690,7 +7690,7 @@ might help (with 'rm \jobname.?? \jobname.??s')%
 % If SUBTOPIC is present, precede it with a space, and call \doind.
 % (At some time during the 20th century, this made a two-level entry in an
 % index such as the operation index.  Nobody seemed to notice the change in
-% behavior though.)
+% behaviour though.)
 \def\dosubind#1#2#3{%
   \def\thirdarg{#3}%
   \ifx\thirdarg\empty
diff --git a/lib/alloca.in.h b/lib/alloca.in.h
index 228f9a0a29b..c7187e66ae3 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, 2006-2020 Free Software
-   Foundation, Inc.
+   Copyright (C) 1995, 1999, 2001-2004, 2006-2020 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 64223f16fc2..477b4bf4dd3 100644
--- a/lib/binary-io.h
+++ b/lib/binary-io.h
@@ -1,6 +1,5 @@
 /* Binary mode I/O.
-   Copyright (C) 2001, 2003, 2005, 2008-2020 Free Software Foundation,
-   Inc.
+   Copyright (C) 2001, 2003, 2005, 2008-2020 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 42891bb1683..fbd11b34508 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, 2008-2020 Free Software Foundation,
-   Inc.
+   Copyright (C) 2000-2003, 2006, 2008-2020 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 f660bba73b5..951220f3e29 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, 2009-2020 Free Software
-   Foundation, Inc.
+   Copyright (C) 1998-1999, 2005-2006, 2009-2020 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 89df6915840..9ad49191b7f 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, 2009-2020 Free Software
-   Foundation, Inc.
+   Copyright (C) 1998-1999, 2005-2006, 2009-2020 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/careadlinkat.c b/lib/careadlinkat.c
index 197ce8de77f..1effdb78451 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, 2009-2020 Free Software
-   Foundation, Inc.
+   Copyright (C) 2001, 2003-2004, 2007, 2009-2020 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 269e6f25f3b..510be3d57ec 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, 2009-2020 Free Software Foundation,
-   Inc.
+   Copyright (C) 1991, 2004-2006, 2009-2020 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 b1d04a53059..04bc8009a57 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, 2006-2020 Free Software Foundation,
-   Inc.
+   Copyright (C) 1998-2002, 2004, 2006-2020 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/count-leading-zeros.h b/lib/count-leading-zeros.h
index 2b65cc9eda9..b548754e181 100644
--- a/lib/count-leading-zeros.h
+++ b/lib/count-leading-zeros.h
@@ -100,7 +100,6 @@ count_leading_zeros_l (unsigned long int x)
   COUNT_LEADING_ZEROS (__builtin_clzl, _BitScanReverse, unsigned long int);
 }
 
-#if HAVE_UNSIGNED_LONG_LONG_INT
 /* Compute and return the number of leading zeros in X. */
 COUNT_LEADING_ZEROS_INLINE int
 count_leading_zeros_ll (unsigned long long int x)
@@ -108,7 +107,6 @@ count_leading_zeros_ll (unsigned long long int x)
   COUNT_LEADING_ZEROS (__builtin_clzll, _BitScanReverse64,
                        unsigned long long int);
 }
-#endif
 
 _GL_INLINE_HEADER_END
 
diff --git a/lib/count-one-bits.h b/lib/count-one-bits.h
index 040776f7466..78770e4240d 100644
--- a/lib/count-one-bits.h
+++ b/lib/count-one-bits.h
@@ -122,14 +122,12 @@ count_one_bits_l (unsigned long int x)
   COUNT_ONE_BITS (__builtin_popcountl, __popcnt, unsigned long int);
 }
 
-#if HAVE_UNSIGNED_LONG_LONG_INT
 /* Compute and return the number of 1-bits set in X. */
 COUNT_ONE_BITS_INLINE int
 count_one_bits_ll (unsigned long long int x)
 {
   COUNT_ONE_BITS (__builtin_popcountll, __popcnt64, unsigned long long int);
 }
-#endif
 
 _GL_INLINE_HEADER_END
 
diff --git a/lib/count-trailing-zeros.h b/lib/count-trailing-zeros.h
index 15e85708d18..2169f626251 100644
--- a/lib/count-trailing-zeros.h
+++ b/lib/count-trailing-zeros.h
@@ -92,7 +92,6 @@ count_trailing_zeros_l (unsigned long int x)
   COUNT_TRAILING_ZEROS (__builtin_ctzl, _BitScanForward, unsigned long int);
 }
 
-#if HAVE_UNSIGNED_LONG_LONG_INT
 /* Compute and return the number of trailing zeros in X. */
 COUNT_TRAILING_ZEROS_INLINE int
 count_trailing_zeros_ll (unsigned long long int x)
@@ -100,7 +99,6 @@ count_trailing_zeros_ll (unsigned long long int x)
   COUNT_TRAILING_ZEROS (__builtin_ctzll, _BitScanForward64,
                         unsigned long long int);
 }
-#endif
 
 _GL_INLINE_HEADER_END
 
diff --git a/lib/diffseq.h b/lib/diffseq.h
index 16e06053b43..c89363ac9ee 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, 2006-2020 Free
-   Software Foundation, Inc.
+   Copyright (C) 1988-1989, 1992-1995, 2001-2004, 2006-2020 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/dosname.h b/lib/dosname.h
index 3bb08a5eeec..57829600948 100644
--- a/lib/dosname.h
+++ b/lib/dosname.h
@@ -1,7 +1,6 @@
 /* File names on MS-DOS/Windows systems.
 
-   Copyright (C) 2000-2001, 2004-2006, 2009-2020 Free Software
-   Foundation, Inc.
+   Copyright (C) 2000-2001, 2004-2006, 2009-2020 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 b5c3a00c740..88ef2591313 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, 2009-2020 Free Software Foundation,
-   Inc.
+   Copyright (C) 1999, 2004-2007, 2009-2020 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/filemode.h b/lib/filemode.h
index 8b8464f220a..f84a491625c 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, 2009-2020 Free Software
-   Foundation, Inc.
+   Copyright (C) 1998-1999, 2003, 2006, 2009-2020 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.c b/lib/fpending.c
index 4db32eafd6a..802ebcba654 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, 2009-2020 Free Software
-   Foundation, Inc.
+   Copyright (C) 2000, 2004, 2006-2007, 2009-2020 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 52639379975..a8b8859726d 100644
--- a/lib/fpending.h
+++ b/lib/fpending.h
@@ -1,7 +1,7 @@
 /* Declare __fpending.
 
-   Copyright (C) 2000, 2003, 2005-2006, 2009-2020 Free Software
-   Foundation, Inc.
+   Copyright (C) 2000, 2003, 2005-2006, 2009-2020 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 c0ee4533f9a..81960152d41 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, 2009-2020 Free
-   Software Foundation, Inc.
+   Copyright (C) 1991-1992, 1996, 1998-1999, 2002-2006, 2009-2020 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 b1ec68dadf9..4396b4d64b7 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, 2006-2020 Free Software Foundation,
-   Inc.
+   Copyright (C) 1996, 1999, 2003, 2006-2020 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 507017339cc..ebb6f5d5dba 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, 2003-2020 Free
-   Software Foundation, Inc.
+   Copyright (C) 1985-1989, 1991-1995, 1997, 1999-2000, 2003-2020 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 4c6b5efcc3f..0bd1e13348a 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, 2009-2020 Free
-   Software Foundation, Inc.
+   Copyright (C) 1995-1998, 2000-2002, 2004-2006, 2009-2020 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 f212a238a88..f5b8ca53b5f 100644
--- a/lib/gettime.c
+++ b/lib/gettime.c
@@ -1,7 +1,6 @@
 /* gettime -- get the system clock
 
-   Copyright (C) 2002, 2004-2007, 2009-2020 Free Software Foundation,
-   Inc.
+   Copyright (C) 2002, 2004-2007, 2009-2020 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 b5e2c300305..b63f8f29292 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, 2009-2020 Free Software
-   Foundation, Inc.
+   Copyright (C) 2001-2003, 2005-2007, 2009-2020 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 5adea10c18e..951e5b1a652 100644
--- a/lib/gnulib.mk.in
+++ b/lib/gnulib.mk.in
@@ -580,7 +580,6 @@ HAVE_LCHMOD = @HAVE_LCHMOD@
 HAVE_LCHOWN = @HAVE_LCHOWN@
 HAVE_LINK = @HAVE_LINK@
 HAVE_LINKAT = @HAVE_LINKAT@
-HAVE_LONG_LONG_INT = @HAVE_LONG_LONG_INT@
 HAVE_LSTAT = @HAVE_LSTAT@
 HAVE_MAKEINFO = @HAVE_MAKEINFO@
 HAVE_MAX_ALIGN_T = @HAVE_MAX_ALIGN_T@
@@ -676,7 +675,6 @@ HAVE_TZSET = @HAVE_TZSET@
 HAVE_UNISTD_H = @HAVE_UNISTD_H@
 HAVE_UNLINKAT = @HAVE_UNLINKAT@
 HAVE_UNLOCKPT = @HAVE_UNLOCKPT@
-HAVE_UNSIGNED_LONG_LONG_INT = @HAVE_UNSIGNED_LONG_LONG_INT@
 HAVE_USLEEP = @HAVE_USLEEP@
 HAVE_UTIMENSAT = @HAVE_UTIMENSAT@
 HAVE_VASPRINTF = @HAVE_VASPRINTF@
@@ -768,6 +766,7 @@ MAKEINFO = @MAKEINFO@
 MAKE_PROG = @MAKE_PROG@
 MKDIR_P = @MKDIR_P@
 MODULES_OBJ = @MODULES_OBJ@
+MODULES_SECONDARY_SUFFIX = @MODULES_SECONDARY_SUFFIX@
 MODULES_SUFFIX = @MODULES_SUFFIX@
 NEXT_AS_FIRST_DIRECTIVE_DIRENT_H = @NEXT_AS_FIRST_DIRECTIVE_DIRENT_H@
 NEXT_AS_FIRST_DIRECTIVE_ERRNO_H = @NEXT_AS_FIRST_DIRECTIVE_ERRNO_H@
@@ -1198,12 +1197,9 @@ endif
 ifeq (,$(OMIT_GNULIB_MODULE_at-internal))
 
 ifneq (,$(gl_GNULIB_ENABLED_260941c0e5dc67ec9e87d1fb321c300b))
+libgnu_a_SOURCES += openat-priv.h openat-proc.c
 
 endif
-EXTRA_DIST += openat-priv.h openat-proc.c
-
-EXTRA_libgnu_a_SOURCES += openat-proc.c
-
 endif
 ## end   gnulib module at-internal
 
@@ -1910,8 +1906,6 @@ inttypes.h: inttypes.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_U
               -e 's|@''NEXT_INTTYPES_H''@|$(NEXT_INTTYPES_H)|g' \
               -e 's/@''PRI_MACROS_BROKEN''@/$(PRI_MACROS_BROKEN)/g' \
               -e 's/@''APPLE_UNIVERSAL_BUILD''@/$(APPLE_UNIVERSAL_BUILD)/g' \
-              -e 's/@''HAVE_LONG_LONG_INT''@/$(HAVE_LONG_LONG_INT)/g' \
-              -e 's/@''HAVE_UNSIGNED_LONG_LONG_INT''@/$(HAVE_UNSIGNED_LONG_LONG_INT)/g' \
               -e 's/@''PRIPTR_PREFIX''@/$(PRIPTR_PREFIX)/g' \
               -e 's/@''GNULIB_IMAXABS''@/$(GNULIB_IMAXABS)/g' \
               -e 's/@''GNULIB_IMAXDIV''@/$(GNULIB_IMAXDIV)/g' \
@@ -2432,8 +2426,6 @@ stdint.h: stdint.in.h $(top_builddir)/config.status
               -e 's/@''HAVE_SYS_INTTYPES_H''@/$(HAVE_SYS_INTTYPES_H)/g' \
               -e 's/@''HAVE_SYS_BITYPES_H''@/$(HAVE_SYS_BITYPES_H)/g' \
               -e 's/@''HAVE_WCHAR_H''@/$(HAVE_WCHAR_H)/g' \
-              -e 's/@''HAVE_LONG_LONG_INT''@/$(HAVE_LONG_LONG_INT)/g' \
-              -e 's/@''HAVE_UNSIGNED_LONG_LONG_INT''@/$(HAVE_UNSIGNED_LONG_LONG_INT)/g' \
               -e 's/@''APPLE_UNIVERSAL_BUILD''@/$(APPLE_UNIVERSAL_BUILD)/g' \
               -e 's/@''BITSIZEOF_PTRDIFF_T''@/$(BITSIZEOF_PTRDIFF_T)/g' \
               -e 's/@''PTRDIFF_T_SUFFIX''@/$(PTRDIFF_T_SUFFIX)/g' \
diff --git a/lib/group-member.c b/lib/group-member.c
index 7aa8a453615..6a6fc5605ef 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, 2009-2020 Free
-   Software Foundation, Inc.
+   Copyright (C) 1994, 1997-1998, 2003, 2005-2006, 2009-2020 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/inttypes.in.h b/lib/inttypes.in.h
index da84aff0440..5184e266f27 100644
--- a/lib/inttypes.in.h
+++ b/lib/inttypes.in.h
@@ -189,7 +189,7 @@
 #  define _PRI64_PREFIX "l"
 # elif defined _MSC_VER || defined __MINGW32__
 #  define _PRI64_PREFIX "I64"
-# elif @HAVE_LONG_LONG_INT@ && LONG_MAX >> 30 == 1
+# elif LONG_MAX >> 30 == 1
 #  define _PRI64_PREFIX _LONG_LONG_FORMAT_PREFIX
 # endif
 # if !defined PRId64 || @PRI_MACROS_BROKEN@
@@ -206,7 +206,7 @@
 #  define _PRIu64_PREFIX "l"
 # elif defined _MSC_VER || defined __MINGW32__
 #  define _PRIu64_PREFIX "I64"
-# elif @HAVE_UNSIGNED_LONG_LONG_INT@ && ULONG_MAX >> 31 == 1
+# elif ULONG_MAX >> 31 == 1
 #  define _PRIu64_PREFIX _LONG_LONG_FORMAT_PREFIX
 # endif
 # if !defined PRIo64 || @PRI_MACROS_BROKEN@
@@ -682,7 +682,7 @@
 #  define _SCN64_PREFIX "l"
 # elif defined _MSC_VER || defined __MINGW32__
 #  define _SCN64_PREFIX "I64"
-# elif @HAVE_LONG_LONG_INT@ && LONG_MAX >> 30 == 1
+# elif LONG_MAX >> 30 == 1
 #  define _SCN64_PREFIX _LONG_LONG_FORMAT_PREFIX
 # endif
 # if !defined SCNd64 || @PRI_MACROS_BROKEN@
@@ -699,7 +699,7 @@
 #  define _SCNu64_PREFIX "l"
 # elif defined _MSC_VER || defined __MINGW32__
 #  define _SCNu64_PREFIX "I64"
-# elif @HAVE_UNSIGNED_LONG_LONG_INT@ && ULONG_MAX >> 31 == 1
+# elif ULONG_MAX >> 31 == 1
 #  define _SCNu64_PREFIX _LONG_LONG_FORMAT_PREFIX
 # endif
 # if !defined SCNo64 || @PRI_MACROS_BROKEN@
diff --git a/lib/localtime-buffer.c b/lib/localtime-buffer.c
index eb099ff8d84..141849c5461 100644
--- a/lib/localtime-buffer.c
+++ b/lib/localtime-buffer.c
@@ -1,7 +1,6 @@
 /* Provide access to the last buffer returned by localtime() or gmtime().
 
-   Copyright (C) 2001-2003, 2005-2007, 2009-2020 Free Software
-   Foundation, Inc.
+   Copyright (C) 2001-2003, 2005-2007, 2009-2020 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/localtime-buffer.h b/lib/localtime-buffer.h
index 2552cfcffba..3801742f7ba 100644
--- a/lib/localtime-buffer.h
+++ b/lib/localtime-buffer.h
@@ -1,7 +1,6 @@
 /* Provide access to the last buffer returned by localtime() or gmtime().
 
-   Copyright (C) 2001-2003, 2005-2007, 2009-2020 Free Software
-   Foundation, Inc.
+   Copyright (C) 2001-2003, 2005-2007, 2009-2020 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/malloca.c b/lib/malloca.c
index 59bd74d598b..975b166daed 100644
--- a/lib/malloca.c
+++ b/lib/malloca.c
@@ -1,6 +1,5 @@
 /* Safe automatic memory allocation.
-   Copyright (C) 2003, 2006-2007, 2009-2020 Free Software Foundation,
-   Inc.
+   Copyright (C) 2003, 2006-2007, 2009-2020 Free Software Foundation, Inc.
    Written by Bruno Haible <bruno@clisp.org>, 2003, 2018.
 
    This program is free software; you can redistribute it and/or modify
diff --git a/lib/malloca.h b/lib/malloca.h
index 0d0b713c7bd..cfcd4de4ad8 100644
--- a/lib/malloca.h
+++ b/lib/malloca.h
@@ -112,14 +112,10 @@ enum
    among all elementary types.  */
   sa_alignment_long = sa_alignof (long),
   sa_alignment_double = sa_alignof (double),
-#if HAVE_LONG_LONG_INT
   sa_alignment_longlong = sa_alignof (long long),
-#endif
   sa_alignment_longdouble = sa_alignof (long double),
   sa_alignment_max = ((sa_alignment_long - 1) | (sa_alignment_double - 1)
-#if HAVE_LONG_LONG_INT
                       | (sa_alignment_longlong - 1)
-#endif
                       | (sa_alignment_longdouble - 1)
                      ) + 1
 };
diff --git a/lib/md5.c b/lib/md5.c
index e0f3032aec0..74cf2c3a0f7 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, 2008-2020 Free
-   Software Foundation, Inc.
+   Copyright (C) 1995-1997, 1999-2001, 2005-2006, 2008-2020 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 7c827b0586a..239748ae0cb 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, 2008-2020 Free
-   Software Foundation, Inc.
+   Copyright (C) 1995-1997, 1999-2001, 2004-2006, 2008-2020 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 9108f6f697c..6f6574211f8 100644
--- a/lib/memmem.c
+++ b/lib/memmem.c
@@ -1,5 +1,5 @@
-/* Copyright (C) 1991-1994, 1996-1998, 2000, 2004, 2007-2020 Free
-   Software Foundation, Inc.
+/* Copyright (C) 1991-1994, 1996-1998, 2000, 2004, 2007-2020 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 b4256edcbb9..7ff32e11338 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, 2003-2020 Free
-   Software Foundation, Inc.
+   Copyright (C) 1991, 1993, 1996-1997, 1999-2000, 2003-2020 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.c b/lib/mktime.c
index a13fa27e2bc..92c00b2b14b 100644
--- a/lib/mktime.c
+++ b/lib/mktime.c
@@ -141,7 +141,7 @@ shr (long_int a, int b)
   long_int one = 1;
   return (-one >> 1 == -1
           ? a >> b
-          : a / (one << b) - (a % (one << b) < 0));
+          : (a + (a < 0)) / (one << b) - (a < 0));
 }
 
 /* Bounds for the intersection of __time64_t and long_int.  */
@@ -211,8 +211,8 @@ ydhms_diff (long_int year1, long_int yday1, int hour1, int min1, int sec1,
      Take care to avoid integer overflow here.  */
   int a4 = shr (year1, 2) + shr (TM_YEAR_BASE, 2) - ! (year1 & 3);
   int b4 = shr (year0, 2) + shr (TM_YEAR_BASE, 2) - ! (year0 & 3);
-  int a100 = a4 / 25 - (a4 % 25 < 0);
-  int b100 = b4 / 25 - (b4 % 25 < 0);
+  int a100 = (a4 + (a4 < 0)) / 25 - (a4 < 0);
+  int b100 = (b4 + (b4 < 0)) / 25 - (b4 < 0);
   int a400 = shr (a100, 2);
   int b400 = shr (b100, 2);
   int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400);
diff --git a/lib/nstrftime.c b/lib/nstrftime.c
index 667c7ddc56e..fc5052a549c 100644
--- a/lib/nstrftime.c
+++ b/lib/nstrftime.c
@@ -113,7 +113,7 @@ extern char *tzname[];
 #define SHR(a, b)       \
   (-1 >> 1 == -1        \
    ? (a) >> (b)         \
-   : (a) / (1 << (b)) - ((a) % (1 << (b)) < 0))
+   : ((a) + ((a) < 0)) / (1 << (b)) - ((a) < 0))
 
 #define TM_YEAR_BASE 1900
 
@@ -348,8 +348,8 @@ tm_diff (const struct tm *a, const struct tm *b)
      but it's OK to assume that A and B are close to each other.  */
   int a4 = SHR (a->tm_year, 2) + SHR (TM_YEAR_BASE, 2) - ! (a->tm_year & 3);
   int b4 = SHR (b->tm_year, 2) + SHR (TM_YEAR_BASE, 2) - ! (b->tm_year & 3);
-  int a100 = a4 / 25 - (a4 % 25 < 0);
-  int b100 = b4 / 25 - (b4 % 25 < 0);
+  int a100 = (a4 + (a4 < 0)) / 25 - (a4 < 0);
+  int b100 = (b4 + (b4 < 0)) / 25 - (b4 < 0);
   int a400 = SHR (a100, 2);
   int b400 = SHR (b100, 2);
   int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400);
@@ -927,9 +927,11 @@ __strftime_internal (STREAM_OR_CHAR_T *s, STRFTIME_ARG (size_t maxsize)
             }
 
           {
-            int century = tp->tm_year / 100 + TM_YEAR_BASE / 100;
-            century -= tp->tm_year % 100 < 0 && 0 < century;
-            DO_YEARISH (2, tp->tm_year < - TM_YEAR_BASE, century);
+            bool negative_year = tp->tm_year < - TM_YEAR_BASE;
+            bool zero_thru_1899 = !negative_year & (tp->tm_year < 0);
+            int century = ((tp->tm_year - 99 * zero_thru_1899) / 100
+                           + TM_YEAR_BASE / 100);
+            DO_YEARISH (2, negative_year, century);
           }
 
         case L_('x'):
@@ -1138,8 +1140,8 @@ __strftime_internal (STREAM_OR_CHAR_T *s, STRFTIME_ARG (size_t maxsize)
             int ndigs = ns_digits;
             while (width < ndigs || (1 < ndigs && n % 10 == 0))
               ndigs--, n /= 10;
-            for (int i = ndigs; 0 < i; i--)
-              buf[i - 1] = n % 10 + L_('0'), n /= 10;
+            for (int j = ndigs; 0 < j; j--)
+              buf[j - 1] = n % 10 + L_('0'), n /= 10;
             if (!pad)
               pad = L_('0');
             width_cpy (0, ndigs, buf);
diff --git a/lib/sha1.c b/lib/sha1.c
index 68e74ff3f98..bacf29c4051 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, 2008-2020 Free Software
-   Foundation, Inc.
+   Copyright (C) 2000-2001, 2003-2006, 2008-2020 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 47c6cfcf95e..905daea2f20 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, 2009-2020 Free Software Foundation,
-   Inc.
+   Copyright (C) 2002, 2004, 2006, 2009-2020 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/signal.in.h b/lib/signal.in.h
index 42e1897f1ea..9fe9f605c3a 100644
--- a/lib/signal.in.h
+++ b/lib/signal.in.h
@@ -322,6 +322,12 @@ _GL_FUNCDECL_RPL (signal, _gl_function_taking_int_returning_void_t,
 _GL_CXXALIAS_RPL (signal, _gl_function_taking_int_returning_void_t,
                   (int sig, _gl_function_taking_int_returning_void_t func));
 # else
+/* On OpenBSD, the declaration of 'signal' may not be present at this point,
+   because it occurs in <sys/signal.h>, not <signal.h> directly.  */
+#  if defined __OpenBSD__
+_GL_FUNCDECL_SYS (signal, _gl_function_taking_int_returning_void_t,
+                  (int sig, _gl_function_taking_int_returning_void_t func));
+#  endif
 _GL_CXXALIAS_SYS (signal, _gl_function_taking_int_returning_void_t,
                   (int sig, _gl_function_taking_int_returning_void_t func));
 # endif
diff --git a/lib/stdalign.in.h b/lib/stdalign.in.h
index 2f53411e16c..cd786bed2cd 100644
--- a/lib/stdalign.in.h
+++ b/lib/stdalign.in.h
@@ -102,7 +102,7 @@
 #  define _Alignas(a) alignas (a)
 # elif ((defined __APPLE__ && defined __MACH__                  \
          ? 4 < __GNUC__ + (1 <= __GNUC_MINOR__)                 \
-         : __GNUC__)                                            \
+         : __GNUC__ && !defined __ibmxl__) \
         || (__ia64 && (61200 <= __HP_cc || 61200 <= __HP_aCC)) \
         || __ICC || 0x590 <= __SUNPRO_C || 0x0600 <= __xlC__)
 #  define _Alignas(a) __attribute__ ((__aligned__ (a)))
diff --git a/lib/stddef.in.h b/lib/stddef.in.h
index e146063c026..2e50a1f01e8 100644
--- a/lib/stddef.in.h
+++ b/lib/stddef.in.h
@@ -83,20 +83,26 @@
 
 /* Some platforms lack max_align_t.  The check for _GCC_MAX_ALIGN_T is
    a hack in case the configure-time test was done with g++ even though
-   we are currently compiling with gcc.  */
-#if ! (@HAVE_MAX_ALIGN_T@ || defined _GCC_MAX_ALIGN_T)
-# if !GNULIB_defined_max_align_t
+   we are currently compiling with gcc.
+   On MSVC, max_align_t is defined only in C++ mode, after <cstddef> was
+   included.  Its definition is good since it has an alignment of 8 (on x86
+   and x86_64).  */
+#if defined _MSC_VER && defined __cplusplus
+# include <cstddef>
+#else
+# if ! (@HAVE_MAX_ALIGN_T@ || defined _GCC_MAX_ALIGN_T)
+#  if !GNULIB_defined_max_align_t
 /* On the x86, the maximum storage alignment of double, long, etc. is 4,
    but GCC's C11 ABI for x86 says that max_align_t has an alignment of 8,
    and the C11 standard allows this.  Work around this problem by
    using __alignof__ (which returns 8 for double) rather than _Alignof
    (which returns 4), and align each union member accordingly.  */
-#  ifdef __GNUC__
-#   define _GL_STDDEF_ALIGNAS(type) \
-      __attribute__ ((__aligned__ (__alignof__ (type))))
-#  else
-#   define _GL_STDDEF_ALIGNAS(type) /* */
-#  endif
+#   ifdef __GNUC__
+#    define _GL_STDDEF_ALIGNAS(type) \
+       __attribute__ ((__aligned__ (__alignof__ (type))))
+#   else
+#    define _GL_STDDEF_ALIGNAS(type) /* */
+#   endif
 typedef union
 {
   char *__p _GL_STDDEF_ALIGNAS (char *);
@@ -104,8 +110,9 @@ typedef union
   long double __ld _GL_STDDEF_ALIGNAS (long double);
   long int __i _GL_STDDEF_ALIGNAS (long int);
 } rpl_max_align_t;
-#  define max_align_t rpl_max_align_t
-#  define GNULIB_defined_max_align_t 1
+#   define max_align_t rpl_max_align_t
+#   define GNULIB_defined_max_align_t 1
+#  endif
 # endif
 #endif
 
diff --git a/lib/stdint.in.h b/lib/stdint.in.h
index a83bc45c79c..994c0c777c0 100644
--- a/lib/stdint.in.h
+++ b/lib/stdint.in.h
@@ -188,7 +188,7 @@ typedef long int gl_int64_t;
 typedef __int64 gl_int64_t;
 #   define int64_t gl_int64_t
 #   define GL_INT64_T
-#  elif @HAVE_LONG_LONG_INT@
+#  else
 #   undef int64_t
 typedef long long int gl_int64_t;
 #   define int64_t gl_int64_t
@@ -209,7 +209,7 @@ typedef unsigned long int gl_uint64_t;
 typedef unsigned __int64 gl_uint64_t;
 #   define uint64_t gl_uint64_t
 #   define GL_UINT64_T
-#  elif @HAVE_UNSIGNED_LONG_LONG_INT@
+#  else
 #   undef uint64_t
 typedef unsigned long long int gl_uint64_t;
 #   define uint64_t gl_uint64_t
@@ -333,7 +333,7 @@ typedef unsigned long int gl_uintptr_t;
 # ifndef INTMAX_MAX
 #  undef INTMAX_C
 #  undef intmax_t
-#  if @HAVE_LONG_LONG_INT@ && LONG_MAX >> 30 == 1
+#  if LONG_MAX >> 30 == 1
 typedef long long int gl_intmax_t;
 #   define intmax_t gl_intmax_t
 #  elif defined GL_INT64_T
@@ -347,7 +347,7 @@ typedef long int gl_intmax_t;
 # ifndef UINTMAX_MAX
 #  undef UINTMAX_C
 #  undef uintmax_t
-#  if @HAVE_UNSIGNED_LONG_LONG_INT@ && ULONG_MAX >> 31 == 1
+#  if ULONG_MAX >> 31 == 1
 typedef unsigned long long int gl_uintmax_t;
 #   define uintmax_t gl_uintmax_t
 #  elif defined GL_UINT64_T
@@ -647,21 +647,21 @@ typedef int _verify_intmax_size[sizeof (intmax_t) == sizeof (uintmax_t)
 #  define INT64_C(x) x##L
 # elif defined _MSC_VER
 #  define INT64_C(x) x##i64
-# elif @HAVE_LONG_LONG_INT@
+# else
 #  define INT64_C(x) x##LL
 # endif
 # if ULONG_MAX >> 31 >> 31 >> 1 == 1
 #  define UINT64_C(x) x##UL
 # elif defined _MSC_VER
 #  define UINT64_C(x) x##ui64
-# elif @HAVE_UNSIGNED_LONG_LONG_INT@
+# else
 #  define UINT64_C(x) x##ULL
 # endif
 
 /* 7.18.4.2. Macros for greatest-width integer constants */
 
 # ifndef INTMAX_C
-#  if @HAVE_LONG_LONG_INT@ && LONG_MAX >> 30 == 1
+#  if LONG_MAX >> 30 == 1
 #   define INTMAX_C(x)   x##LL
 #  elif defined GL_INT64_T
 #   define INTMAX_C(x)   INT64_C(x)
@@ -671,7 +671,7 @@ typedef int _verify_intmax_size[sizeof (intmax_t) == sizeof (uintmax_t)
 # endif
 
 # ifndef UINTMAX_C
-#  if @HAVE_UNSIGNED_LONG_LONG_INT@ && ULONG_MAX >> 31 == 1
+#  if ULONG_MAX >> 31 == 1
 #   define UINTMAX_C(x)  x##ULL
 #  elif defined GL_UINT64_T
 #   define UINTMAX_C(x)  UINT64_C(x)
diff --git a/lib/stdio.in.h b/lib/stdio.in.h
index 6dc526eaab0..ebcbfaf5e77 100644
--- a/lib/stdio.in.h
+++ b/lib/stdio.in.h
@@ -1259,7 +1259,9 @@ _GL_FUNCDECL_SYS (vdprintf, int, (int fd, const char *format, va_list args)
 _GL_CXXALIAS_SYS_CAST (vdprintf, int,
                        (int fd, const char *format, va_list args));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (vdprintf);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef vdprintf
 # if HAVE_RAW_DECL_VDPRINTF
diff --git a/lib/stdlib.in.h b/lib/stdlib.in.h
index 1524277d799..e088959b285 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, 2006-2020 Free Software Foundation,
-   Inc.
+   Copyright (C) 1995, 2001-2004, 2006-2020 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
@@ -600,7 +599,9 @@ _GL_CXXALIAS_RPL (random, long, (void));
 #  if !@HAVE_RANDOM@
 _GL_FUNCDECL_SYS (random, long, (void));
 #  endif
-_GL_CXXALIAS_SYS (random, long, (void));
+/* Need to cast, because on Haiku, the return type is
+                               int.  */
+_GL_CXXALIAS_SYS_CAST (random, long, (void));
 # endif
 _GL_CXXALIASWARN (random);
 #elif defined GNULIB_POSIXCHECK
@@ -767,9 +768,11 @@ _GL_FUNCDECL_SYS (initstate_r, int,
                    struct random_data *rand_state)
                   _GL_ARG_NONNULL ((2, 4)));
 #  endif
-_GL_CXXALIAS_SYS (initstate_r, int,
-                  (unsigned int seed, char *buf, size_t buf_size,
-                   struct random_data *rand_state));
+/* Need to cast, because on Haiku, the third parameter is
+                                                     unsigned long buf_size.  */
+_GL_CXXALIAS_SYS_CAST (initstate_r, int,
+                       (unsigned int seed, char *buf, size_t buf_size,
+                        struct random_data *rand_state));
 # endif
 _GL_CXXALIASWARN (initstate_r);
 #elif defined GNULIB_POSIXCHECK
@@ -797,8 +800,10 @@ _GL_FUNCDECL_SYS (setstate_r, int,
                   (char *arg_state, struct random_data *rand_state)
                   _GL_ARG_NONNULL ((1, 2)));
 #  endif
-_GL_CXXALIAS_SYS (setstate_r, int,
-                  (char *arg_state, struct random_data *rand_state));
+/* Need to cast, because on Haiku, the first parameter is
+                        void *arg_state.  */
+_GL_CXXALIAS_SYS_CAST (setstate_r, int,
+                       (char *arg_state, struct random_data *rand_state));
 # endif
 _GL_CXXALIASWARN (setstate_r);
 #elif defined GNULIB_POSIXCHECK
diff --git a/lib/strtoimax.c b/lib/strtoimax.c
index 95f6f3ff11f..a17b2f0a9d7 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, 2009-2020 Free Software
-   Foundation, Inc.
+   Copyright (C) 1999, 2001-2004, 2006, 2009-2020 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
@@ -28,36 +28,30 @@
 #include "verify.h"
 
 #ifdef UNSIGNED
-# if HAVE_UNSIGNED_LONG_LONG_INT
-#  ifndef HAVE_DECL_STRTOULL
+# ifndef HAVE_DECL_STRTOULL
 "this configure-time declaration test was not run"
-#  endif
-#  if !HAVE_DECL_STRTOULL
+# endif
+# if !HAVE_DECL_STRTOULL
 unsigned long long int strtoull (char const *, char **, int);
-#  endif
 # endif
 
 #else
 
-# if HAVE_LONG_LONG_INT
-#  ifndef HAVE_DECL_STRTOLL
+# ifndef HAVE_DECL_STRTOLL
 "this configure-time declaration test was not run"
-#  endif
-#  if !HAVE_DECL_STRTOLL
+# endif
+# if !HAVE_DECL_STRTOLL
 long long int strtoll (char const *, char **, int);
-#  endif
 # endif
 #endif
 
 #ifdef UNSIGNED
-# define Have_long_long HAVE_UNSIGNED_LONG_LONG_INT
 # define Int uintmax_t
 # define Strtoimax strtoumax
 # define Strtol strtoul
 # define Strtoll strtoull
 # define Unsigned unsigned
 #else
-# define Have_long_long HAVE_LONG_LONG_INT
 # define Int intmax_t
 # define Strtoimax strtoimax
 # define Strtol strtol
@@ -68,15 +62,11 @@ long long int strtoll (char const *, char **, int);
 Int
 Strtoimax (char const *ptr, char **endptr, int base)
 {
-#if Have_long_long
   verify (sizeof (Int) == sizeof (Unsigned long int)
           || sizeof (Int) == sizeof (Unsigned long long int));
 
   if (sizeof (Int) != sizeof (Unsigned long int))
     return Strtoll (ptr, endptr, base);
-#else
-  verify (sizeof (Int) == sizeof (Unsigned long int));
-#endif
 
   return Strtol (ptr, endptr, base);
 }
diff --git a/lib/strtol.c b/lib/strtol.c
index a2e1dee99ee..02aafca44ea 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, 2009-2020 Free
-   Software Foundation, Inc.
+   Copyright (C) 1991-1992, 1994-1999, 2003, 2005-2007, 2009-2020 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 0b8e03c025c..3c7e8c002f0 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, 2009-2020 Free Software
-   Foundation, Inc.
+   Copyright (C) 1995-1997, 1999, 2001, 2009-2020 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/tempname.c b/lib/tempname.c
index 7c46ad14078..0aad0616c85 100644
--- a/lib/tempname.c
+++ b/lib/tempname.c
@@ -1,7 +1,6 @@
 /* tempname.c - generate the name of a temporary file.
 
-   Copyright (C) 1991-2003, 2005-2007, 2009-2020 Free Software
-   Foundation, Inc.
+   Copyright (C) 1991-2003, 2005-2007, 2009-2020 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/time_r.c b/lib/time_r.c
index 25068ad7276..e8fca2d5c44 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, 2010-2020 Free Software Foundation,
-   Inc.
+   Copyright (C) 2003, 2006-2007, 2010-2020 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/unistd.in.h b/lib/unistd.in.h
index ddb7c5771ba..7909416f366 100644
--- a/lib/unistd.in.h
+++ b/lib/unistd.in.h
@@ -21,7 +21,7 @@
 #endif
 @PRAGMA_COLUMNS@
 
-#ifdef _GL_INCLUDING_UNISTD_H
+#if @HAVE_UNISTD_H@ && defined _GL_INCLUDING_UNISTD_H
 /* Special invocation convention:
    - On Mac OS X 10.3.9 we have a sequence of nested includes
      <unistd.h> -> <signal.h> -> <pthread.h> -> <unistd.h>
@@ -905,6 +905,11 @@ _GL_WARN_ON_USE (getlogin_r, "getlogin_r is unportable - "
 _GL_FUNCDECL_RPL (getpagesize, int, (void));
 _GL_CXXALIAS_RPL (getpagesize, int, (void));
 # else
+/* On HP-UX, getpagesize exists, but it is not declared in <unistd.h> even if
+   the compiler options -D_HPUX_SOURCE -D_XOPEN_SOURCE=600 are used.  */
+#  if defined __hpux
+_GL_FUNCDECL_SYS (getpagesize, int, (void));
+#  endif
 #  if !@HAVE_GETPAGESIZE@
 #   if !defined getpagesize
 /* This is for POSIX systems.  */
@@ -1672,7 +1677,9 @@ _GL_CXXALIAS_RPL (usleep, int, (useconds_t n));
 #  if !@HAVE_USLEEP@
 _GL_FUNCDECL_SYS (usleep, int, (useconds_t n));
 #  endif
-_GL_CXXALIAS_SYS (usleep, int, (useconds_t n));
+/* Need to cast, because on Haiku, the first parameter is
+                                     unsigned int n.  */
+_GL_CXXALIAS_SYS_CAST (usleep, int, (useconds_t n));
 # endif
 _GL_CXXALIASWARN (usleep);
 #elif defined GNULIB_POSIXCHECK
diff --git a/lib/xalloc-oversized.h b/lib/xalloc-oversized.h
index 6e007b566db..13ee23031a0 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, 2006-2020 Free Software
-   Foundation, Inc.
+   Copyright (C) 1990-2000, 2003-2004, 2006-2020 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/m4/alloca.m4 b/m4/alloca.m4
index 5f4653967d1..59225245b91 100644
--- a/m4/alloca.m4
+++ b/m4/alloca.m4
@@ -1,6 +1,6 @@
 # alloca.m4 serial 15
-dnl Copyright (C) 2002-2004, 2006-2007, 2009-2020 Free Software
-dnl Foundation, Inc.
+dnl Copyright (C) 2002-2004, 2006-2007, 2009-2020 Free Software Foundation,
+dnl Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/m4/d-type.m4 b/m4/d-type.m4
index bcb179ad4e1..d40220a1b59 100644
--- a/m4/d-type.m4
+++ b/m4/d-type.m4
@@ -5,8 +5,7 @@ dnl
 dnl Check whether struct dirent has a member named d_type.
 dnl
 
-# Copyright (C) 1997, 1999-2004, 2006, 2009-2020 Free Software
-# Foundation, Inc.
+# Copyright (C) 1997, 1999-2004, 2006, 2009-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
diff --git a/m4/dup2.m4 b/m4/dup2.m4
index 2835bb1cf99..21b1ecc26b8 100644
--- a/m4/dup2.m4
+++ b/m4/dup2.m4
@@ -1,6 +1,5 @@
 #serial 25
-dnl Copyright (C) 2002, 2005, 2007, 2009-2020 Free Software Foundation,
-dnl Inc.
+dnl Copyright (C) 2002, 2005, 2007, 2009-2020 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/m4/filemode.m4 b/m4/filemode.m4
index a1b7e105b59..5aaaa1a167d 100644
--- a/m4/filemode.m4
+++ b/m4/filemode.m4
@@ -1,6 +1,5 @@
 # filemode.m4 serial 8
-dnl Copyright (C) 2002, 2005-2006, 2009-2020 Free Software Foundation,
-dnl Inc.
+dnl Copyright (C) 2002, 2005-2006, 2009-2020 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/m4/fsusage.m4 b/m4/fsusage.m4
index 64fcf5d290d..0bc62066aab 100644
--- a/m4/fsusage.m4
+++ b/m4/fsusage.m4
@@ -1,8 +1,7 @@
 # serial 34
 # Obtaining file system usage information.
 
-# Copyright (C) 1997-1998, 2000-2001, 2003-2020 Free Software
-# Foundation, Inc.
+# Copyright (C) 1997-1998, 2000-2001, 2003-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
diff --git a/m4/getgroups.m4 b/m4/getgroups.m4
index 79436460f30..3e7e46f8672 100644
--- a/m4/getgroups.m4
+++ b/m4/getgroups.m4
@@ -3,8 +3,7 @@
 dnl From Jim Meyering.
 dnl A wrapper around AC_FUNC_GETGROUPS.
 
-# Copyright (C) 1996-1997, 1999-2004, 2008-2020 Free Software
-# Foundation, Inc.
+# Copyright (C) 1996-1997, 1999-2004, 2008-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
diff --git a/m4/getloadavg.m4 b/m4/getloadavg.m4
index 74a116fd10d..3bd2a142e73 100644
--- a/m4/getloadavg.m4
+++ b/m4/getloadavg.m4
@@ -1,7 +1,7 @@
 # Check for getloadavg.
 
-# Copyright (C) 1992-1996, 1999-2000, 2002-2003, 2006, 2008-2020 Free
-# Software Foundation, Inc.
+# Copyright (C) 1992-1996, 1999-2000, 2002-2003, 2006, 2008-2020 Free Software
+# Foundation, Inc.
 
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
diff --git a/m4/gettime.m4 b/m4/gettime.m4
index 6a1f9a4157d..e65455a2ff9 100644
--- a/m4/gettime.m4
+++ b/m4/gettime.m4
@@ -1,6 +1,5 @@
 # gettime.m4 serial 9
-dnl Copyright (C) 2002, 2004-2006, 2009-2020 Free Software Foundation,
-dnl Inc.
+dnl Copyright (C) 2002, 2004-2006, 2009-2020 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/m4/gettimeofday.m4 b/m4/gettimeofday.m4
index 443c6f9309a..c72b3eacc63 100644
--- a/m4/gettimeofday.m4
+++ b/m4/gettimeofday.m4
@@ -1,7 +1,6 @@
 # serial 27
 
-# Copyright (C) 2001-2003, 2005, 2007, 2009-2020 Free Software
-# Foundation, Inc.
+# Copyright (C) 2001-2003, 2005, 2007, 2009-2020 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
diff --git a/m4/glibc21.m4 b/m4/glibc21.m4
index 9197d3bf45f..ece484b5ae9 100644
--- a/m4/glibc21.m4
+++ b/m4/glibc21.m4
@@ -1,6 +1,6 @@
 # glibc21.m4 serial 5
-dnl Copyright (C) 2000-2002, 2004, 2008, 2010-2020 Free Software
-dnl Foundation, Inc.
+dnl Copyright (C) 2000-2002, 2004, 2008, 2010-2020 Free Software Foundation,
+dnl Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/m4/gnulib-common.m4 b/m4/gnulib-common.m4
index b617eacff01..6c4cad6cef4 100644
--- a/m4/gnulib-common.m4
+++ b/m4/gnulib-common.m4
@@ -415,12 +415,13 @@ AC_DEFUN([AC_C_RESTRICT],
    nothing if this is not supported.  Do not define if restrict is
    supported directly.  */
 #undef restrict
-/* Work around a bug in Sun C++: it does not support _Restrict or
-   __restrict__, even though the corresponding Sun C compiler ends up with
-   "#define restrict _Restrict" or "#define restrict __restrict__" in the
-   previous line.  Perhaps some future version of Sun C++ will work with
-   restrict; if so, hopefully it defines __RESTRICT like Sun C does.  */
-#if defined __SUNPRO_CC && !defined __RESTRICT
+/* Work around a bug in older versions of Sun C++, which did not
+   #define __restrict__ or support _Restrict or __restrict__
+   even though the corresponding Sun C compiler ended up with
+   "#define restrict _Restrict" or "#define restrict __restrict__"
+   in the previous line.  This workaround can be removed once
+   we assume Oracle Developer Studio 12.5 (2016) or later.  */
+#if defined __SUNPRO_CC && !defined __RESTRICT && !defined __restrict__
 # define _Restrict
 # define __restrict__
 #endif])
diff --git a/m4/gnulib-comp.m4 b/m4/gnulib-comp.m4
index c952c9c956c..85a60569326 100644
--- a/m4/gnulib-comp.m4
+++ b/m4/gnulib-comp.m4
@@ -220,9 +220,6 @@ AC_DEFUN([gl_INIT],
     AC_LIBOBJ([copy-file-range])
   fi
   gl_UNISTD_MODULE_INDICATOR([copy-file-range])
-  gl_COUNT_LEADING_ZEROS
-  gl_COUNT_ONE_BITS
-  gl_COUNT_TRAILING_ZEROS
   gl_MD5
   gl_SHA1
   gl_SHA256
@@ -484,7 +481,6 @@ AC_DEFUN([gl_INIT],
   func_gl_gnulib_m4code_260941c0e5dc67ec9e87d1fb321c300b ()
   {
     if ! $gl_gnulib_enabled_260941c0e5dc67ec9e87d1fb321c300b; then
-      AC_LIBOBJ([openat-proc])
       gl_gnulib_enabled_260941c0e5dc67ec9e87d1fb321c300b=true
       func_gl_gnulib_m4code_open
     fi
@@ -1050,9 +1046,6 @@ AC_DEFUN([gl_FILE_LIST], [
   m4/canonicalize.m4
   m4/clock_time.m4
   m4/copy-file-range.m4
-  m4/count-leading-zeros.m4
-  m4/count-one-bits.m4
-  m4/count-trailing-zeros.m4
   m4/d-type.m4
   m4/dirent_h.m4
   m4/dirfd.m4
@@ -1094,7 +1087,6 @@ AC_DEFUN([gl_FILE_LIST], [
   m4/largefile.m4
   m4/limits-h.m4
   m4/localtime-buffer.m4
-  m4/longlong.m4
   m4/lstat.m4
   m4/malloca.m4
   m4/manywarnings-c++.m4
diff --git a/m4/group-member.m4 b/m4/group-member.m4
index 5b32b5ff498..ad7368ceecb 100644
--- a/m4/group-member.m4
+++ b/m4/group-member.m4
@@ -1,7 +1,6 @@
 # serial 14
 
-# Copyright (C) 1999-2001, 2003-2007, 2009-2020 Free Software
-# Foundation, Inc.
+# Copyright (C) 1999-2001, 2003-2007, 2009-2020 Free Software Foundation, Inc.
 
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
diff --git a/m4/inttypes.m4 b/m4/inttypes.m4
index e037be6fcc5..d0487d6368c 100644
--- a/m4/inttypes.m4
+++ b/m4/inttypes.m4
@@ -1,4 +1,4 @@
-# inttypes.m4 serial 27
+# inttypes.m4 serial 28
 dnl Copyright (C) 2006-2020 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -113,10 +113,8 @@ AC_DEFUN([gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION],
 
             #if $2
              #define CONDITION ($3)
-            #elif HAVE_LONG_LONG_INT
-             #define CONDITION ($4)
             #else
-             #define CONDITION 0
+             #define CONDITION ($4)
             #endif
             int test[CONDITION ? 1 : -1];]])],
        [gl_cv_test_$1=yes],
diff --git a/m4/largefile.m4 b/m4/largefile.m4
index f6863e46c49..40b16bc0e54 100644
--- a/m4/largefile.m4
+++ b/m4/largefile.m4
@@ -5,6 +5,22 @@
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
 
+# The following macro works around a problem in Autoconf's AC_FUNC_FSEEKO:
+# It does not set _LARGEFILE_SOURCE=1 on HP-UX/ia64 32-bit, although this
+# setting of _LARGEFILE_SOURCE is needed so that <stdio.h> declares fseeko
+# and ftello in C++ mode as well.
+AC_DEFUN([gl_SET_LARGEFILE_SOURCE],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_FUNC_FSEEKO
+  case "$host_os" in
+    hpux*)
+      AC_DEFINE([_LARGEFILE_SOURCE], [1],
+        [Define to 1 to make fseeko visible on some hosts (e.g. glibc 2.2).])
+      ;;
+  esac
+])
+
 # The following implementation works around a problem in autoconf <= 2.69;
 # AC_SYS_LARGEFILE does not configure for large inodes on Mac OS X 10.5,
 # or configures them incorrectly in some cases.
diff --git a/m4/malloca.m4 b/m4/malloca.m4
index 99e9dace2c5..930199da14a 100644
--- a/m4/malloca.m4
+++ b/m4/malloca.m4
@@ -1,6 +1,6 @@
-# malloca.m4 serial 1
-dnl Copyright (C) 2003-2004, 2006-2007, 2009-2020 Free Software
-dnl Foundation, Inc.
+# malloca.m4 serial 2
+dnl Copyright (C) 2003-2004, 2006-2007, 2009-2020 Free Software Foundation,
+dnl Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -11,5 +11,4 @@ AC_DEFUN([gl_MALLOCA],
   dnl @ALLOCA@ and @LTALLOCA@.
   dnl gl_FUNC_ALLOCA   dnl Already brought in by the module dependencies.
   AC_REQUIRE([gl_EEMALLOC])
-  AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
 ])
diff --git a/m4/mempcpy.m4 b/m4/mempcpy.m4
index 63e4087784b..899f12a880a 100644
--- a/m4/mempcpy.m4
+++ b/m4/mempcpy.m4
@@ -1,6 +1,6 @@
 # mempcpy.m4 serial 11
-dnl Copyright (C) 2003-2004, 2006-2007, 2009-2020 Free Software
-dnl Foundation, Inc.
+dnl Copyright (C) 2003-2004, 2006-2007, 2009-2020 Free Software Foundation,
+dnl Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/m4/memrchr.m4 b/m4/memrchr.m4
index 8e33fb96a07..95990ed6b76 100644
--- a/m4/memrchr.m4
+++ b/m4/memrchr.m4
@@ -1,6 +1,6 @@
 # memrchr.m4 serial 10
-dnl Copyright (C) 2002-2003, 2005-2007, 2009-2020 Free Software
-dnl Foundation, Inc.
+dnl Copyright (C) 2002-2003, 2005-2007, 2009-2020 Free Software Foundation,
+dnl Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/m4/mktime.m4 b/m4/mktime.m4
index 5e89f20e979..c00843f0f40 100644
--- a/m4/mktime.m4
+++ b/m4/mktime.m4
@@ -1,6 +1,6 @@
 # serial 31
-dnl Copyright (C) 2002-2003, 2005-2007, 2009-2020 Free Software
-dnl Foundation, Inc.
+dnl Copyright (C) 2002-2003, 2005-2007, 2009-2020 Free Software Foundation,
+dnl Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/m4/nstrftime.m4 b/m4/nstrftime.m4
index ec41d42f4ba..c15fab3e98b 100644
--- a/m4/nstrftime.m4
+++ b/m4/nstrftime.m4
@@ -1,7 +1,6 @@
 # serial 34
 
-# Copyright (C) 1996-1997, 1999-2007, 2009-2020 Free Software
-# Foundation, Inc.
+# Copyright (C) 1996-1997, 1999-2007, 2009-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
diff --git a/m4/pathmax.m4 b/m4/pathmax.m4
index dc6bc3bceba..bb4fdeba750 100644
--- a/m4/pathmax.m4
+++ b/m4/pathmax.m4
@@ -1,6 +1,6 @@
 # pathmax.m4 serial 11
-dnl Copyright (C) 2002-2003, 2005-2006, 2009-2020 Free Software
-dnl Foundation, Inc.
+dnl Copyright (C) 2002-2003, 2005-2006, 2009-2020 Free Software Foundation,
+dnl Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/m4/sig2str.m4 b/m4/sig2str.m4
index c9b1a860a17..415290c4dee 100644
--- a/m4/sig2str.m4
+++ b/m4/sig2str.m4
@@ -1,6 +1,5 @@
 # serial 7
-dnl Copyright (C) 2002, 2005-2006, 2009-2020 Free Software Foundation,
-dnl Inc.
+dnl Copyright (C) 2002, 2005-2006, 2009-2020 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/m4/ssize_t.m4 b/m4/ssize_t.m4
index b77032b47a3..6c0a588873c 100644
--- a/m4/ssize_t.m4
+++ b/m4/ssize_t.m4
@@ -1,6 +1,5 @@
 # ssize_t.m4 serial 5 (gettext-0.18.2)
-dnl Copyright (C) 2001-2003, 2006, 2010-2020 Free Software Foundation,
-dnl Inc.
+dnl Copyright (C) 2001-2003, 2006, 2010-2020 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/m4/st_dm_mode.m4 b/m4/st_dm_mode.m4
index 9c44ae73dc1..5dad161c3b2 100644
--- a/m4/st_dm_mode.m4
+++ b/m4/st_dm_mode.m4
@@ -1,7 +1,6 @@
 # serial 6
 
-# Copyright (C) 1998-1999, 2001, 2009-2020 Free Software Foundation,
-# Inc.
+# Copyright (C) 1998-1999, 2001, 2009-2020 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
diff --git a/m4/stat-time.m4 b/m4/stat-time.m4
index 59bd29f91ac..0ac3f7272e3 100644
--- a/m4/stat-time.m4
+++ b/m4/stat-time.m4
@@ -1,7 +1,7 @@
 # Checks for stat-related time functions.
 
-# Copyright (C) 1998-1999, 2001, 2003, 2005-2007, 2009-2020 Free
-# Software Foundation, Inc.
+# Copyright (C) 1998-1999, 2001, 2003, 2005-2007, 2009-2020 Free Software
+# Foundation, Inc.
 
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
diff --git a/m4/stdint.m4 b/m4/stdint.m4
index 3f75a18f32c..29ad826d8ea 100644
--- a/m4/stdint.m4
+++ b/m4/stdint.m4
@@ -1,4 +1,4 @@
-# stdint.m4 serial 53
+# stdint.m4 serial 54
 dnl Copyright (C) 2001-2020 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -17,21 +17,12 @@ AC_DEFUN_ONCE([gl_STDINT_H],
   AC_REQUIRE([gl_LIMITS_H])
   AC_REQUIRE([gt_TYPE_WINT_T])
 
-  dnl Check for long long int and unsigned long long int.
-  AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
-  if test $ac_cv_type_long_long_int = yes; then
-    HAVE_LONG_LONG_INT=1
-  else
-    HAVE_LONG_LONG_INT=0
-  fi
-  AC_SUBST([HAVE_LONG_LONG_INT])
-  AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT])
-  if test $ac_cv_type_unsigned_long_long_int = yes; then
-    HAVE_UNSIGNED_LONG_LONG_INT=1
-  else
-    HAVE_UNSIGNED_LONG_LONG_INT=0
-  fi
-  AC_SUBST([HAVE_UNSIGNED_LONG_LONG_INT])
+  dnl For backward compatibility. Some packages may still be testing these
+  dnl macros.
+  AC_DEFINE([HAVE_LONG_LONG_INT], [1],
+    [Define to 1 if the system has the type 'long long int'.])
+  AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], [1],
+    [Define to 1 if the system has the type 'unsigned long long int'.])
 
   dnl Check for <wchar.h>, in the same way as gl_WCHAR_H does.
   AC_CHECK_HEADERS_ONCE([wchar.h])
diff --git a/m4/strnlen.m4 b/m4/strnlen.m4
index 67d4eb05c03..71b8e1baffe 100644
--- a/m4/strnlen.m4
+++ b/m4/strnlen.m4
@@ -1,6 +1,6 @@
 # strnlen.m4 serial 13
-dnl Copyright (C) 2002-2003, 2005-2007, 2009-2020 Free Software
-dnl Foundation, Inc.
+dnl Copyright (C) 2002-2003, 2005-2007, 2009-2020 Free Software Foundation,
+dnl Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/m4/strtoimax.m4 b/m4/strtoimax.m4
index de97d75ce67..4958e3dcd50 100644
--- a/m4/strtoimax.m4
+++ b/m4/strtoimax.m4
@@ -1,6 +1,5 @@
-# strtoimax.m4 serial 15
-dnl Copyright (C) 2002-2004, 2006, 2009-2020 Free Software Foundation,
-dnl Inc.
+# strtoimax.m4 serial 16
+dnl Copyright (C) 2002-2004, 2006, 2009-2020 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -86,5 +85,4 @@ int main ()
 # Prerequisites of lib/strtoimax.c.
 AC_DEFUN([gl_PREREQ_STRTOIMAX], [
   AC_CHECK_DECLS([strtoll])
-  AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
 ])
diff --git a/m4/strtoll.m4 b/m4/strtoll.m4
index af962836ec6..edcde3b5582 100644
--- a/m4/strtoll.m4
+++ b/m4/strtoll.m4
@@ -1,6 +1,5 @@
-# strtoll.m4 serial 7
-dnl Copyright (C) 2002, 2004, 2006, 2008-2020 Free Software Foundation,
-dnl Inc.
+# strtoll.m4 serial 8
+dnl Copyright (C) 2002, 2004, 2006, 2008-2020 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -8,14 +7,9 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_STRTOLL],
 [
   AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
-  dnl We don't need (and can't compile) the replacement strtoll
-  dnl unless the type 'long long int' exists.
-  AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
-  if test "$ac_cv_type_long_long_int" = yes; then
-    AC_CHECK_FUNCS([strtoll])
-    if test $ac_cv_func_strtoll = no; then
-      HAVE_STRTOLL=0
-    fi
+  AC_CHECK_FUNCS([strtoll])
+  if test $ac_cv_func_strtoll = no; then
+    HAVE_STRTOLL=0
   fi
 ])
 
diff --git a/m4/time_h.m4 b/m4/time_h.m4
index e4fe59084f8..aae0ae22741 100644
--- a/m4/time_h.m4
+++ b/m4/time_h.m4
@@ -1,7 +1,6 @@
 # Configure a more-standard replacement for <time.h>.
 
-# Copyright (C) 2000-2001, 2003-2007, 2009-2020 Free Software
-# Foundation, Inc.
+# Copyright (C) 2000-2001, 2003-2007, 2009-2020 Free Software Foundation, Inc.
 
 # serial 11
 
diff --git a/m4/timespec.m4 b/m4/timespec.m4
index 5ed82b109c6..e71628dc318 100644
--- a/m4/timespec.m4
+++ b/m4/timespec.m4
@@ -1,7 +1,6 @@
 #serial 15
 
-# Copyright (C) 2000-2001, 2003-2007, 2009-2020 Free Software
-# Foundation, Inc.
+# Copyright (C) 2000-2001, 2003-2007, 2009-2020 Free Software Foundation, Inc.
 
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,