2 # Determine whether this system has infrastructure for obtaining the boot time.
4 # Copyright (C) 1996-2013 Free Software Foundation, Inc.
6 # This program is free software: you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation, either version 3 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
19 # GNULIB_BOOT_TIME([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
20 * ----------------------------------------------------------
21 AC_DEFUN([GNULIB_BOOT_TIME],
23 AC_CHECK_FUNCS([sysctl])
24 AC_CHECK_HEADERS_ONCE([sys/param.h])
25 AC_CHECK_HEADERS([sys/sysctl.h], [], [],
28 #include <sys/param.h>
30 AC_CHECK_HEADERS_ONCE([utmp.h utmpx.h OS.h])
32 [whether we can get the system boot time],
33 [gnulib_cv_have_boot_time],
38 #if HAVE_SYSCTL && HAVE_SYS_SYSCTL_H
40 # include <sys/param.h> /* needed for OpenBSD 3.0 */
42 # include <sys/sysctl.h>
54 #if (defined BOOT_TIME \
55 || (defined CTL_KERN && defined KERN_BOOTTIME) \
57 /* your system *does* have the infrastructure to determine boot time */
59 please_tell_us_how_to_determine_boot_time_on_your_system
62 [gnulib_cv_have_boot_time=yes],
63 [gnulib_cv_have_boot_time=no])
65 AS_IF([test $gnulib_cv_have_boot_time = yes], [$1], [$2])