i have this code..try to compile it but there is a problem...

Dialogue = gtk_dialog_new();
gtk_window_set_title(GTK_WINDOW(Dialogue), _("Configuration"));
gtk_container_set_border_width(GTK_CONTAINER(GTK_D IALOG(Dialogue)->vbox), 5);

Frame = gtk_frame_new(_("Serial port"));
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(Dialogue)->vbox), Frame, FALSE, TRUE, 5);

Table = gtk_table_new(4, 3, FALSE);
gtk_container_add(GTK_CONTAINER(Frame), Table);

Label = gtk_label_new(_("Port :"));
gtk_table_attach(GTK_TABLE(Table), Label, 0, 1, 0, 1, 0, 0, 10, 5);
Label = gtk_label_new(_("Speed :"));
gtk_table_attach(GTK_TABLE(Table), Label, 1, 2, 0, 1, 0, 0, 10, 5);
Label = gtk_label_new(_("Parity :"));
gtk_table_attach(GTK_TABLE(Table), Label, 2, 3, 0, 1, 0, 0, 10, 5);

Combo = gtk_combo_new();
gtk_editable_set_editable(GTK_EDITABLE((GTK_COMBO( Combo)->entry)), TRUE);

gtk_combo_set_popdown_strings(GTK_COMBO(Combo), liste);
gtk_combo_set_value_in_list(GTK_COMBO(Combo), FALSE, FALSE);

chaine = g_strdup(config.port);

when compile, i got error undefined reference to `config'
the part that i bold...

can anybody help me out from this...