AC_ARG_WITH([build-timestamp],
            AC_HELP_STRING([--without-build-timestamp],[Don't include build timestamp in version information]),
            [ with_build_timestamp=${withval} ],
            [ with_build_timestamp=yes ])

if test "$with_build_timestamp" != "no" ; then
  AC_DEFINE(HAVE_BUILD_TIMESTAMP, [1], [Define if the build timestamp should be included in the version information])
  opt_featues_yes="$opt_features_yes\n   * build-timestamps in version information"
else
  opt_featues_no="$opt_features_no\n   * build-timestamps in version information"
fi