AC_ARG_WITH([rootprefix],
AS_HELP_STRING([--with-rootprefix=DIR], [rootfs directory prefix for config files and kernel modules]),
[], [with_rootprefix=${ac_default_prefix}])
AC_ARG_WITH([rootprefix],
AS_HELP_STRING([--with-rootprefix=DIR], [rootfs directory prefix for config files and kernel modules]),
[], [with_rootprefix=${ac_default_prefix}])