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# Determine whether this system has infrastructure for obtaining the boot time.
# GNULIB_BOOT_TIME([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
* ----------------------------------------------------------
AC_DEFUN([GNULIB_BOOT_TIME],
[
AC_CHECK_FUNCS(sysctl)
AC_CHECK_HEADERS(sys/sysctl.h)
AC_CACHE_CHECK(
[whether we can get the system boot time],
[gnulib_cv_have_boot_time],
[
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[AC_INCLUDES_DEFAULT
#if HAVE_SYSCTL && HAVE_SYS_SYSCTL_H
# include <sys/param.h> /* needed for OpenBSD 3.0 */
# include <sys/sysctl.h>
#endif
#ifdef HAVE_UTMPX_H
# include <utmpx.h>
#else
# include <utmp.h>
#endif
],
[[
#if defined BOOT_TIME || (defined CTL_KERN && defined KERN_BOOTTIME)
/* your system *does* have the infrastructure to determine boot time */
#else
please_tell_us_how_to_determine_boot_time_on_your_system
#endif
]])],
gnulib_cv_have_boot_time=yes,
gnulib_cv_have_boot_time=no)
])
AS_IF([test $gnulib_cv_have_boot_time = yes], [$1], [$2])
])
|
