};
/* All the options that the HTML driver supports. */
-static struct outp_option option_tab[] =
+static const struct outp_option option_tab[] =
{
{"output-file", string_arg, 0},
{"chart-files", string_arg, 1},
/* HTML driver class. */
-struct outp_class html_class =
+const struct outp_class html_class =
{
"html",
1,