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diff --git a/m4/utime.m4 b/m4/utime.m4
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+# utime.m4 serial 4
+dnl Copyright (C) 2017-2022 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.
+
+AC_DEFUN([gl_FUNC_UTIME],
+[
+ AC_REQUIRE([gl_UTIME_H_DEFAULTS])
+ AC_REQUIRE([AC_CANONICAL_HOST])
+ AC_CHECK_FUNCS_ONCE([lstat])
+ case "$host_os" in
+ mingw*)
+ dnl On this platform, the original utime() or _utime() produces
+ dnl timestamps that are affected by the time zone.
+ dnl Use the function name 'rpl_utime' always, in order to avoid a
+ dnl possible conflict with the function name 'utime' from oldnames.lib
+ dnl (MSVC) or liboldnames.a (mingw).
+ REPLACE_UTIME=1
+ ;;
+ *)
+ AC_CHECK_FUNCS([utime])
+ if test $ac_cv_func_utime = no; then
+ HAVE_UTIME=0
+ else
+ dnl On macOS 10.13, utime("link-to-file/", NULL) mistakenly succeeds.
+ AC_CACHE_CHECK([whether utime handles trailing slashes on files],
+ [gl_cv_func_utime_file_slash],
+ [touch conftest.tmp
+ # Assume that if we have lstat, we can also check symlinks.
+ if test $ac_cv_func_lstat = yes; then
+ ln -s conftest.tmp conftest.lnk
+ fi
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <stddef.h>
+ #include <utime.h>
+ ]],
+ [[int result = 0;
+ if (!utime ("conftest.tmp/", NULL))
+ result |= 1;
+ #if HAVE_LSTAT
+ if (!utime ("conftest.lnk/", NULL))
+ result |= 2;
+ #endif
+ return result;
+ ]])],
+ [gl_cv_func_utime_file_slash=yes],
+ [gl_cv_func_utime_file_slash=no],
+ [case "$host_os" in
+ # Guess yes on Linux systems.
+ linux-* | linux) gl_cv_func_utime_file_slash="guessing yes" ;;
+ # Guess yes on glibc systems.
+ *-gnu* | gnu*) gl_cv_func_utime_file_slash="guessing yes" ;;
+ # Guess no on macOS.
+ darwin*) gl_cv_func_utime_file_slash="guessing no" ;;
+ # If we don't know, obey --enable-cross-guesses.
+ *) gl_cv_func_utime_file_slash="$gl_cross_guess_normal" ;;
+ esac
+ ])
+ rm -f conftest.tmp conftest.lnk
+ ])
+ case $gl_cv_func_stat_file_slash in
+ *no)
+ REPLACE_UTIME=1
+ AC_DEFINE([REPLACE_FUNC_UTIME_FILE], [1],
+ [Define to 1 if utime needs help when passed a file name with a trailing slash])
+ ;;
+ esac
+ fi
+ ;;
+ esac
+])
+
+# Prerequisites of lib/utime.c.
+AC_DEFUN([gl_PREREQ_UTIME], [:])