Update from gnulib

This incorporates:
2019-12-23 mktime, nstrftime: tweak division performance
2019-12-22 count-leading-zeros: assume 'long long'
2019-12-22 count-one-bits: assume 'long long'
2019-12-22 count-trailing-zeros: assume 'long long'
2019-12-12 inttypes-incomplete: assume 'long long'
2019-12-22 malloca: assume 'long long'
2019-12-22 stdint: assume 'long long'
2019-12-22 strtoll, strtoimax, strtoumax: assume 'long long'
2019-12-22 prefer lib_SOURCES to unconditional AC_LIBOBJ
2019-12-19 nstrftime: avoid a shadowing warning
2019-12-18 improve port of AC_C_RESTRICT to Oracle C++
2019-12-12 stdalign: port to xlclang 16.01
2019-12-11 stddef, unistd: fix compilation error in C++ mode on MSVC
2019-12-08 fix compilation errors in C++ mode on Haiku
2019-12-08 fix compilation errors in 32-bit C++ mode on HP-UX 11/ia64
2019-12-08 fix compilation error in C++ mode on OpenBSD
* build-aux/config.guess, doc/misc/texinfo.tex:
* lib/count-leading-zeros.h, lib/count-one-bits.h:
* lib/count-trailing-zeros.h, lib/inttypes.in.h, lib/malloca.h:
* lib/mktime.c, lib/nstrftime.c, lib/signal.in.h, lib/stdalign.in.h:
* lib/stddef.in.h, lib/stdint.in.h, lib/stdio.in.h, lib/stdlib.in.h:
* lib/strtoimax.c, lib/unistd.in.h, m4/gnulib-common.m4:
* m4/inttypes.m4, m4/largefile.m4, m4/malloca.m4, m4/strtoimax.m4:
* m4/strtoll.m4:
Copy from Gnulib.  Also, change copyright notices in some other
Gnulib-copied files to exactly match Gnulib, as Gnulib updated
them in a trivially different way.
* lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate.

31 files changed, 74 insertions, 99 deletions

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,