+extern bool be_safe_global;
+extern bool be_verbose_global;
+extern bool do_internal_type_checking_global;
+extern bool is_pango_format_global;
+extern bool is_TeX_format_global;
+extern bool point_and_click_global;
+extern String prefix_directory;
+extern bool use_object_keys;
+
+/*
+ todo: collect in Output_option struct?
+*/
+extern String output_format_global;
+
+extern bool make_preview;
+extern bool make_print;