5 AC_DEFUN([jm_SYS_PROC_UPTIME],
6 [ dnl Require AC_PROG_CC to see if we're cross compiling.
7 AC_REQUIRE([AC_PROG_CC])
8 AC_CACHE_CHECK([for /proc/uptime], jm_cv_have_proc_uptime,
9 [jm_cv_have_proc_uptime=no
10 test -f /proc/uptime \
11 && test "$cross_compiling" = no \
12 && cat < /proc/uptime >/dev/null 2>/dev/null \
13 && jm_cv_have_proc_uptime=yes])
14 if test $jm_cv_have_proc_uptime = yes; then
15 AC_DEFINE(HAVE_PROC_UPTIME, 1,
16 [ Define if your system has the /proc/uptime special file.])