/* lookup a [struct, union, enum] by name, within a specified block. */
-extern struct type *lookup_struct (char *, struct block *);
+extern struct type *lookup_struct (const char *, struct block *);
-extern struct type *lookup_union (char *, struct block *);
+extern struct type *lookup_union (const char *, struct block *);
-extern struct type *lookup_enum (char *, struct block *);
+extern struct type *lookup_enum (const char *, struct block *);
/* from blockframe.c: */