-#serial 1
+# serial 9
dnl From Jim Meyering
dnl Replace the utime function on systems that need it.
+# Copyright (C) 1998, 2000-2001, 2003-2004, 2009-2010 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.
+
dnl FIXME
-AC_DEFUN(jm_FUNC_UTIME,
+AC_DEFUN([gl_FUNC_UTIME],
[
- AC_CHECK_HEADERS(utime.h)
- AC_REQUIRE([jm_STRUCT_UTIMBUF])
AC_REQUIRE([AC_FUNC_UTIME_NULL])
-
if test $ac_cv_func_utime_null = no; then
- jm_FUNC_UTIMES_NULL
- AC_REPLACE_FUNCS(utime)
+ AC_LIBOBJ([utime])
+ AC_DEFINE([utime], [rpl_utime],
+ [Define to rpl_utime if the replacement function should be used.])
+ gl_PREREQ_UTIME
fi
])
+
+# Prerequisites of lib/utime.c.
+AC_DEFUN([gl_PREREQ_UTIME],
+[
+ AC_CHECK_HEADERS_ONCE([utime.h])
+ AC_REQUIRE([gl_CHECK_TYPE_STRUCT_UTIMBUF])
+ gl_FUNC_UTIMES_NULL
+])
+
+# Use the definition of AC_FUNC_UTIME_NULL from autoconf 2.64 or newer.
+# Remove this macro when we can assume autoconf >= 2.64.
+m4_version_prereq([2.64], [], [
+AC_DEFUN([AC_FUNC_UTIME_NULL],
+[AC_CHECK_HEADERS_ONCE([utime.h])
+AC_CACHE_CHECK([whether utime accepts a null argument], [ac_cv_func_utime_null],
+[rm -f conftest.data; >conftest.data
+# Sequent interprets utime(file, 0) to mean use start of epoch. Wrong.
+AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
+ #ifdef HAVE_UTIME_H
+ # include <utime.h>
+ #endif],
+[[struct stat s, t;
+ return ! (stat ("conftest.data", &s) == 0
+ && utime ("conftest.data", 0) == 0
+ && stat ("conftest.data", &t) == 0
+ && t.st_mtime >= s.st_mtime
+ && t.st_mtime - s.st_mtime < 120);]])],
+ ac_cv_func_utime_null=yes,
+ ac_cv_func_utime_null=no,
+ ac_cv_func_utime_null='guessing yes')])
+if test "x$ac_cv_func_utime_null" != xno; then
+ ac_cv_func_utime_null=yes
+ AC_DEFINE([HAVE_UTIME_NULL], [1],
+ [Define to 1 if `utime(file, NULL)' sets file's timestamp to the
+ present.])
+fi
+rm -f conftest.data
+])
+])