2 # Determine whether this system has infrastructure for obtaining the boot time.
4 # Copyright (C) 1996, 2000, 2002-2004, 2006, 2008-2011 Free Software
7 # This program is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
20 # GNULIB_BOOT_TIME([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
21 * ----------------------------------------------------------
22 AC_DEFUN([GNULIB_BOOT_TIME],
24 AC_CHECK_FUNCS([sysctl])
25 AC_CHECK_HEADERS_ONCE([sys/param.h])
26 AC_CHECK_HEADERS([sys/sysctl.h], [], [],
29 #include <sys/param.h>
31 AC_CHECK_HEADERS_ONCE([utmp.h utmpx.h OS.h])
33 [whether we can get the system boot time],
34 [gnulib_cv_have_boot_time],
39 #if HAVE_SYSCTL && HAVE_SYS_SYSCTL_H
41 # include <sys/param.h> /* needed for OpenBSD 3.0 */
43 # include <sys/sysctl.h>
55 #if (defined BOOT_TIME \
56 || (defined CTL_KERN && defined KERN_BOOTTIME) \
58 /* your system *does* have the infrastructure to determine boot time */
60 please_tell_us_how_to_determine_boot_time_on_your_system
63 [gnulib_cv_have_boot_time=yes],
64 [gnulib_cv_have_boot_time=no])
66 AS_IF([test $gnulib_cv_have_boot_time = yes], [$1], [$2])