1# utime_h.m4 serial 3
2dnl Copyright (C) 2017-2020 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7dnl From Bruno Haible.
8
9AC_DEFUN([gl_UTIME_H],
10[
11  AC_REQUIRE([AC_CANONICAL_HOST])
12  AC_REQUIRE([gl_UTIME_H_DEFAULTS])
13  m4_ifdef([gl_ANSI_CXX], [AC_REQUIRE([gl_ANSI_CXX])])
14  AC_CHECK_HEADERS_ONCE([utime.h])
15  gl_CHECK_NEXT_HEADERS([utime.h])
16
17  if test $ac_cv_header_utime_h = yes; then
18    HAVE_UTIME_H=1
19  else
20    HAVE_UTIME_H=0
21  fi
22  AC_SUBST([HAVE_UTIME_H])
23
24  m4_ifdef([gl_POSIXCHECK],
25    [UTIME_H=utime.h],
26    [UTIME_H=''
27     if m4_ifdef([gl_ANSI_CXX], [test "$CXX" != no], [false]); then
28       dnl Override <utime.h> always, to support the C++ GNULIB_NAMESPACE.
29       UTIME_H=utime.h
30     else
31       if test $ac_cv_header_utime_h != yes; then
32         dnl Provide a substitute <utime.h> file.
33         UTIME_H=utime.h
34       else
35         case "$host_os" in
36           mingw*) dnl Need special handling of 'struct utimbuf'.
37             UTIME_H=utime.h
38             ;;
39         esac
40       fi
41     fi
42    ])
43  AC_SUBST([UTIME_H])
44  AM_CONDITIONAL([GL_GENERATE_UTIME_H], [test -n "$UTIME_H"])
45
46  dnl Check for declarations of anything we want to poison if the
47  dnl corresponding gnulib module is not in use.
48  gl_WARN_ON_USE_PREPARE([[#include <utime.h>
49    ]],
50    [utime])
51])
52
53AC_DEFUN([gl_UTIME_MODULE_INDICATOR],
54[
55  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
56  AC_REQUIRE([gl_UTIME_H_DEFAULTS])
57  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
58  dnl Define it also as a C macro, for the benefit of the unit tests.
59  gl_MODULE_INDICATOR_FOR_TESTS([$1])
60])
61
62AC_DEFUN([gl_UTIME_H_DEFAULTS],
63[
64  GNULIB_UTIME=0;            AC_SUBST([GNULIB_UTIME])
65  dnl Assume POSIX behavior unless another module says otherwise.
66  HAVE_UTIME=1;              AC_SUBST([HAVE_UTIME])
67  REPLACE_UTIME=0;           AC_SUBST([REPLACE_UTIME])
68])
69