extern void cmd_token_del(struct cmd_token *);
extern void cmd_token_varname_set(struct cmd_token *token, const char *varname);
-extern void cmd_graph_parse(struct graph *graph, struct cmd_element *cmd);
+extern void cmd_graph_parse(struct graph *graph, const struct cmd_element *cmd);
extern void cmd_graph_names(struct graph *graph);
-extern void cmd_graph_merge(struct graph *old, struct graph *new,
+extern void cmd_graph_merge(struct graph *old, struct graph *n,
int direction);
/*
* Print callback for DOT dumping.