extern char *concat PARAMS ((const char *, ...)) ATTRIBUTE_MALLOC;
+/* Concatenate an arbitrary number of strings. You must pass NULL as
+ the last argument of this function, to terminate the list of
+ strings. Allocates memory using xmalloc. The first argument is
+ not one of the strings to be concatenated, but if not NULL is a
+ pointer to be freed after the new string is created, similar to the
+ way xrealloc works. */
+
+extern char *reconcat PARAMS ((char *, const char *, ...)) ATTRIBUTE_MALLOC;
+
/* Determine the length of concatenating an arbitrary number of
strings. You must pass NULL as the last argument of this function,
to terminate the list of strings. */