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## taken from coreutils 8.12
# Checks for stat-related time functions.
# Copyright (C) 1998-1999, 2001, 2003, 2005-2007, 2009-2011 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 From Paul Eggert.
# st_atim.tv_nsec - Linux, Solaris, Cygwin
# st_atimespec.tv_nsec - FreeBSD, NetBSD, if ! defined _POSIX_SOURCE
# st_atimensec - FreeBSD, NetBSD, if defined _POSIX_SOURCE
# st_atim.st__tim.tv_nsec - UnixWare (at least 2.1.2 through 7.1)
# st_birthtimespec - FreeBSD, NetBSD (hidden on OpenBSD 3.9, anyway)
# st_birthtim - Cygwin 1.7.0+
AC_DEFUN([gl_STAT_TIME],
[
AC_REQUIRE([AC_C_INLINE])
dnl AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
AC_CHECK_HEADERS_ONCE([sys/time.h])
AC_CHECK_MEMBERS([struct stat.st_atim.tv_nsec],
[AC_CACHE_CHECK([whether struct stat.st_atim is of type struct timespec],
[ac_cv_typeof_struct_stat_st_atim_is_struct_timespec],
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[
#include <sys/types.h>
#include <sys/stat.h>
#if HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#include <time.h>
struct timespec ts;
struct stat st;
]],
[[
st.st_atim = ts;
]])],
[ac_cv_typeof_struct_stat_st_atim_is_struct_timespec=yes],
[ac_cv_typeof_struct_stat_st_atim_is_struct_timespec=no])])
if test $ac_cv_typeof_struct_stat_st_atim_is_struct_timespec = yes; then
AC_DEFINE([TYPEOF_STRUCT_STAT_ST_ATIM_IS_STRUCT_TIMESPEC], [1],
[Define to 1 if the type of the st_atim member of a struct stat is
struct timespec.])
fi],
[AC_CHECK_MEMBERS([struct stat.st_atimespec.tv_nsec], [],
[AC_CHECK_MEMBERS([struct stat.st_atimensec], [],
[AC_CHECK_MEMBERS([struct stat.st_atim.st__tim.tv_nsec], [], [],
[#include <sys/types.h>
#include <sys/stat.h>])],
[#include <sys/types.h>
#include <sys/stat.h>])],
[#include <sys/types.h>
#include <sys/stat.h>])],
[#include <sys/types.h>
#include <sys/stat.h>])
])
# Check for st_birthtime, a feature from UFS2 (FreeBSD, NetBSD, OpenBSD, etc.)
# and NTFS (Cygwin).
# There was a time when this field was named st_createtime (21 June
# 2002 to 16 July 2002) But that window is very small and applied only
# to development code, so systems still using that configuration are
# not supported. See revisions 1.10 and 1.11 of FreeBSD's
# src/sys/ufs/ufs/dinode.h.
#
AC_DEFUN([gl_STAT_BIRTHTIME],
[
AC_REQUIRE([AC_C_INLINE])
dnl AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
AC_CHECK_HEADERS_ONCE([sys/time.h])
AC_CHECK_MEMBERS([struct stat.st_birthtimespec.tv_nsec], [],
[AC_CHECK_MEMBERS([struct stat.st_birthtimensec], [],
[AC_CHECK_MEMBERS([struct stat.st_birthtim.tv_nsec], [], [],
[#include <sys/types.h>
#include <sys/stat.h>])],
[#include <sys/types.h>
#include <sys/stat.h>])],
[#include <sys/types.h>
#include <sys/stat.h>])
])
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