1# Checks for stat-related time functions.
2
3# Copyright (C) 1998, 1999, 2001, 2003, 2005, 2006, 2007 Free Software
4# Foundation, Inc.
5
6# This file is free software; the Free Software Foundation
7# gives unlimited permission to copy and/or distribute it,
8# with or without modifications, as long as this notice is preserved.
9
10dnl From Paul Eggert.
11
12# st_atim.tv_nsec - Linux, Solaris, Cygwin
13# st_atimespec.tv_nsec - FreeBSD, NetBSD, if ! defined _POSIX_SOURCE
14# st_atimensec - FreeBSD, NetBSD, if defined _POSIX_SOURCE
15# st_atim.st__tim.tv_nsec - UnixWare (at least 2.1.2 through 7.1)
16
17# st_birthtimespec - FreeBSD, NetBSD (hidden on OpenBSD 3.9, anyway)
18# st_birthtim - Cygwin 1.7.0+
19
20AC_DEFUN([gl_STAT_TIME],
21[
22  AC_REQUIRE([AC_C_INLINE])
23  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
24  AC_CHECK_HEADERS_ONCE([sys/time.h])
25
26  AC_CHECK_MEMBERS([struct stat.st_atim.tv_nsec],
27    [AC_CACHE_CHECK([whether struct stat.st_atim is of type struct timespec],
28       [ac_cv_typeof_struct_stat_st_atim_is_struct_timespec],
29       [AC_TRY_COMPILE(
30	  [
31	    #include <sys/types.h>
32	    #include <sys/stat.h>
33	    #if HAVE_SYS_TIME_H
34	    # include <sys/time.h>
35	    #endif
36	    #include <time.h>
37	    struct timespec ts;
38	    struct stat st;
39	  ],
40	  [
41	    st.st_atim = ts;
42	  ],
43	  [ac_cv_typeof_struct_stat_st_atim_is_struct_timespec=yes],
44	  [ac_cv_typeof_struct_stat_st_atim_is_struct_timespec=no])])
45     if test $ac_cv_typeof_struct_stat_st_atim_is_struct_timespec = yes; then
46       AC_DEFINE([TYPEOF_STRUCT_STAT_ST_ATIM_IS_STRUCT_TIMESPEC], 1,
47	 [Define to 1 if the type of the st_atim member of a struct stat is
48	  struct timespec.])
49     fi],
50    [AC_CHECK_MEMBERS([struct stat.st_atimespec.tv_nsec], [],
51       [AC_CHECK_MEMBERS([struct stat.st_atimensec], [],
52	  [AC_CHECK_MEMBERS([struct stat.st_atim.st__tim.tv_nsec], [], [],
53	     [#include <sys/types.h>
54	      #include <sys/stat.h>])],
55	  [#include <sys/types.h>
56	   #include <sys/stat.h>])],
57       [#include <sys/types.h>
58	#include <sys/stat.h>])],
59    [#include <sys/types.h>
60     #include <sys/stat.h>])
61])
62
63# Check for st_birthtime, a feature from UFS2 (FreeBSD, NetBSD, OpenBSD, etc.)
64# and NTFS (Cygwin).
65# There was a time when this field was named st_createtime (21 June
66# 2002 to 16 July 2002) But that window is very small and applied only
67# to development code, so systems still using that configuration are
68# not supported.  See revisions 1.10 and 1.11 of FreeBSD's
69# src/sys/ufs/ufs/dinode.h.
70#
71AC_DEFUN([gl_STAT_BIRTHTIME],
72[
73  AC_REQUIRE([AC_C_INLINE])
74  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
75  AC_CHECK_HEADERS_ONCE([sys/time.h])
76  AC_CHECK_MEMBERS([struct stat.st_birthtimespec.tv_nsec], [],
77    [AC_CHECK_MEMBERS([struct stat.st_birthtimensec], [],
78      [AC_CHECK_MEMBERS([struct stat.st_birthtim.tv_nsec], [], [],
79	 [#include <sys/types.h>
80	  #include <sys/stat.h>])],
81       [#include <sys/types.h>
82	#include <sys/stat.h>])],
83    [#include <sys/types.h>
84     #include <sys/stat.h>])
85])
86