Update from Gnulib by running admin/merge-gnulib

7 files changed, 50 insertions, 43 deletions

diff --git a/m4/clock_time.m4 b/m4/clock_time.m4
index d624a73d35d..28534db1c76 100644
--- a/m4/clock_time.m4
+++ b/m4/clock_time.m4
@@ -1,4 +1,4 @@
-# clock_time.m4 serial 12
+# clock_time.m4 serial 13
 dnl Copyright (C) 2002-2006, 2009-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -12,9 +12,17 @@ dnl with or without modifications, as long as this notice is preserved.
 
 AC_DEFUN([gl_CLOCK_TIME],
 [
+  AC_REQUIRE([AC_CANONICAL_HOST])
+
   dnl Persuade glibc and Solaris <time.h> to declare these functions.
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
 
+  # On mingw, these functions are defined in the libwinpthread library,
+  # which is better avoided.  In fact, the clock_gettime function is buggy
+  # in 32-bit mingw, when -D__MINGW_USE_VC2005_COMPAT is used (which Gnulib's
+  # year2038 module does): It leaves the upper 32 bits of the tv_sec field
+  # of the result uninitialized.
+
   # Solaris 2.5.1 needs -lposix4 to get the clock_gettime function.
   # Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.
 
@@ -23,12 +31,22 @@ AC_DEFUN([gl_CLOCK_TIME],
   # library, inducing unnecessary run-time overhead.
   CLOCK_TIME_LIB=
   AC_SUBST([CLOCK_TIME_LIB])
-  gl_saved_libs=$LIBS
-    AC_SEARCH_LIBS([clock_gettime], [rt posix4],
-                   [test "$ac_cv_search_clock_gettime" = "none required" ||
-                    CLOCK_TIME_LIB=$ac_cv_search_clock_gettime])
-    AC_CHECK_FUNCS([clock_getres clock_gettime clock_settime])
-  LIBS=$gl_saved_libs
+  case "$host_os" in
+    mingw*)
+      ac_cv_func_clock_getres=no
+      ac_cv_func_clock_gettime=no
+      ac_cv_func_clock_settime=no
+      ;;
+    *)
+      gl_saved_libs=$LIBS
+        AC_SEARCH_LIBS([clock_gettime], [rt posix4],
+                       [test "$ac_cv_search_clock_gettime" = "none required" ||
+                        CLOCK_TIME_LIB=$ac_cv_search_clock_gettime])
+        AC_CHECK_FUNCS([clock_getres clock_gettime clock_settime])
+      LIBS=$gl_saved_libs
+      ;;
+  esac
+
   # For backward compatibility.
   LIB_CLOCK_GETTIME="$CLOCK_TIME_LIB"
   AC_SUBST([LIB_CLOCK_GETTIME])
diff --git a/m4/mktime.m4 b/m4/mktime.m4
index e9d31f35a46..69cce86da5a 100644
--- a/m4/mktime.m4
+++ b/m4/mktime.m4
@@ -1,4 +1,4 @@
-# serial 37
+# serial 38
 dnl Copyright (C) 2002-2003, 2005-2007, 2009-2023 Free Software Foundation,
 dnl Inc.
 dnl This file is free software; the Free Software Foundation
@@ -280,7 +280,6 @@ AC_DEFUN([gl_FUNC_MKTIME],
   AC_REQUIRE([AC_CANONICAL_HOST])
   AC_REQUIRE([gl_FUNC_MKTIME_WORKS])
 
-  REPLACE_MKTIME=0
   if test "$gl_cv_func_working_mktime" != yes; then
     REPLACE_MKTIME=1
     AC_DEFINE([NEED_MKTIME_WORKING], [1],
diff --git a/m4/nanosleep.m4 b/m4/nanosleep.m4
index e21a3e343cb..b7f22d7b606 100644
--- a/m4/nanosleep.m4
+++ b/m4/nanosleep.m4
@@ -1,4 +1,4 @@
-# serial 43
+# serial 44
 
 dnl From Jim Meyering.
 dnl Check for the nanosleep function.
@@ -126,9 +126,7 @@ AC_DEFUN([gl_FUNC_NANOSLEEP],
        ])
     ])
    case "$gl_cv_func_nanosleep" in
-     *yes)
-       REPLACE_NANOSLEEP=0
-       ;;
+     *yes) ;;
      *)
        REPLACE_NANOSLEEP=1
        case "$gl_cv_func_nanosleep" in
diff --git a/m4/stdalign.m4 b/m4/stdalign.m4
index 1a236d66d2f..6a39ffe7565 100644
--- a/m4/stdalign.m4
+++ b/m4/stdalign.m4
@@ -68,8 +68,10 @@ AC_DEFUN([gl_ALIGNASOF],
   dnl The "zz" puts this toward config.h's end, to avoid potential
   dnl collisions with other definitions.
   AH_VERBATIM([zzalignas],
-[#if !defined HAVE_C_ALIGNASOF && __cplusplus < 201103 && !defined alignof
-# if HAVE_STDALIGN_H
+[#if !defined HAVE_C_ALIGNASOF \
+    && !(defined __cplusplus && 201103 <= __cplusplus) \
+    && !defined alignof
+# if defined HAVE_STDALIGN_H
 #  include <stdalign.h>
 # endif
 
@@ -166,7 +168,7 @@ AC_DEFUN([gl_ALIGNASOF],
 #   define _Alignas(a) __declspec (align (a))
 #  endif
 # endif
-# if !HAVE_STDALIGN_H
+# if !defined HAVE_STDALIGN_H
 #  if ((defined _Alignas \
         && !(defined __cplusplus \
              && (201103 <= __cplusplus || defined _MSC_VER))) \
@@ -175,7 +177,7 @@ AC_DEFUN([gl_ALIGNASOF],
 #  endif
 # endif
 
-# if _GL_STDALIGN_NEEDS_STDDEF
+# if defined _GL_STDALIGN_NEEDS_STDDEF
 #  include <stddef.h>
 # endif
 #endif])
diff --git a/m4/time_h.m4 b/m4/time_h.m4
index 51d553a2f1a..632d18fc071 100644
--- a/m4/time_h.m4
+++ b/m4/time_h.m4
@@ -2,7 +2,7 @@
 
 # Copyright (C) 2000-2001, 2003-2007, 2009-2023 Free Software Foundation, Inc.
 
-# serial 22
+# serial 24
 
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -23,7 +23,10 @@ AC_DEFUN_ONCE([gl_TIME_H],
   dnl corresponding gnulib module is not in use.
   gl_WARN_ON_USE_PREPARE([[
 #include <time.h>
-    ]], [asctime_r ctime_r])
+    ]], [
+      asctime asctime_r ctime ctime_r gmtime_r localtime localtime_r mktime
+      nanosleep strftime strptime time timegm timespec_get timespec_getres tzset
+    ])
 
   AC_REQUIRE([AC_C_RESTRICT])
 
@@ -162,25 +165,15 @@ AC_DEFUN([gl_TIME_H_DEFAULTS],
   HAVE_TIMESPEC_GETRES=1;                AC_SUBST([HAVE_TIMESPEC_GETRES])
   dnl Even GNU libc does not have timezone_t yet.
   HAVE_TIMEZONE_T=0;                     AC_SUBST([HAVE_TIMEZONE_T])
-  dnl If another module says to replace or to not replace, do that.
-  dnl Otherwise, replace only if someone compiles with -DGNULIB_PORTCHECK;
-  dnl this lets maintainers check for portability.
-  REPLACE_CTIME=GNULIB_PORTCHECK;        AC_SUBST([REPLACE_CTIME])
-  REPLACE_LOCALTIME_R=GNULIB_PORTCHECK;  AC_SUBST([REPLACE_LOCALTIME_R])
-  REPLACE_MKTIME=GNULIB_PORTCHECK;       AC_SUBST([REPLACE_MKTIME])
-  REPLACE_NANOSLEEP=GNULIB_PORTCHECK;    AC_SUBST([REPLACE_NANOSLEEP])
-  REPLACE_STRFTIME=GNULIB_PORTCHECK;     AC_SUBST([REPLACE_STRFTIME])
-  REPLACE_TIME=0;                        AC_SUBST([REPLACE_TIME])
-  REPLACE_TIMEGM=GNULIB_PORTCHECK;       AC_SUBST([REPLACE_TIMEGM])
-  REPLACE_TIMESPEC_GET=GNULIB_PORTCHECK; AC_SUBST([REPLACE_TIMESPEC_GET])
-  REPLACE_TZSET=GNULIB_PORTCHECK;        AC_SUBST([REPLACE_TZSET])
-
-  dnl Hack so that the time module doesn't depend on the sys_time module.
-  dnl First, default GNULIB_GETTIMEOFDAY to 0 if sys_time is absent.
-  : ${GNULIB_GETTIMEOFDAY=0};            AC_SUBST([GNULIB_GETTIMEOFDAY])
-  dnl Second, it's OK to not use GNULIB_PORTCHECK for REPLACE_GMTIME
-  dnl and REPLACE_LOCALTIME, as portability to Solaris 2.6 and earlier
-  dnl is no longer a big deal.
+  REPLACE_CTIME=0;                       AC_SUBST([REPLACE_CTIME])
   REPLACE_GMTIME=0;                      AC_SUBST([REPLACE_GMTIME])
   REPLACE_LOCALTIME=0;                   AC_SUBST([REPLACE_LOCALTIME])
+  REPLACE_LOCALTIME_R=0;                 AC_SUBST([REPLACE_LOCALTIME_R])
+  REPLACE_MKTIME=0;                      AC_SUBST([REPLACE_MKTIME])
+  REPLACE_NANOSLEEP=0;                   AC_SUBST([REPLACE_NANOSLEEP])
+  REPLACE_STRFTIME=0;                    AC_SUBST([REPLACE_STRFTIME])
+  REPLACE_TIME=0;                        AC_SUBST([REPLACE_TIME])
+  REPLACE_TIMEGM=0;                      AC_SUBST([REPLACE_TIMEGM])
+  REPLACE_TIMESPEC_GET=0;                AC_SUBST([REPLACE_TIMESPEC_GET])
+  REPLACE_TZSET=0;                       AC_SUBST([REPLACE_TZSET])
 ])
diff --git a/m4/time_r.m4 b/m4/time_r.m4
index adce438abf1..4831eb26f90 100644
--- a/m4/time_r.m4
+++ b/m4/time_r.m4
@@ -57,9 +57,7 @@ AC_DEFUN([gl_TIME_R],
          [gl_cv_time_r_posix=yes],
          [gl_cv_time_r_posix=no])
       ])
-    if test $gl_cv_time_r_posix = yes; then
-      REPLACE_LOCALTIME_R=0
-    else
+    if test $gl_cv_time_r_posix != yes; then
       REPLACE_LOCALTIME_R=1
     fi
   else
diff --git a/m4/timegm.m4 b/m4/timegm.m4
index 8ab265e65fe..6da07807698 100644
--- a/m4/timegm.m4
+++ b/m4/timegm.m4
@@ -1,4 +1,4 @@
-# timegm.m4 serial 15
+# timegm.m4 serial 16
 dnl Copyright (C) 2003, 2007, 2009-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -8,7 +8,6 @@ AC_DEFUN([gl_FUNC_TIMEGM],
 [
   AC_REQUIRE([gl_TIME_H_DEFAULTS])
   AC_REQUIRE([gl_FUNC_MKTIME_WORKS])
-  REPLACE_TIMEGM=0
   gl_CHECK_FUNCS_ANDROID([timegm], [[#include <time.h>]])
   if test $ac_cv_func_timegm = yes; then
     if test "$gl_cv_func_working_mktime" != yes; then