#serial 5AC_PREREQ(2.13)AC_DEFUN([jm_SYS_PROC_UPTIME],[ dnl Require AC_PROG_CC to see if we're cross compiling.  AC_REQUIRE([AC_PROG_CC])  AC_CACHE_CHECK([for /proc/uptime], jm_cv_have_proc_uptime,  [jm_cv_have_proc_uptime=no    test -f /proc/uptime \      && test "$cross_compiling" = no \      && cat < /proc/uptime >/dev/null 2>/dev/null \      && jm_cv_have_proc_uptime=yes])  if test $jm_cv_have_proc_uptime = yes; then    AC_DEFINE(HAVE_PROC_UPTIME, 1,	      [  Define if your system has the /proc/uptime special file.])  fi])