char name[FLEX_ARRAY];
 };
 
-static int dir_entry_cmp(const struct dir_entry *e1,
-               const struct dir_entry *e2, const char *name)
+static int dir_entry_cmp(const void *unused_cmp_data,
+                        const struct dir_entry *e1,
+                        const struct dir_entry *e2,
+                        const char *name)
 {
        return e1->namelen != e2->namelen || strncasecmp(e1->name,
                        name ? name : e2->name, e1->namelen);
                add_dir_entry(istate, ce);
 }
 
-static int cache_entry_cmp(const struct cache_entry *ce1,
-               const struct cache_entry *ce2, const void *remove)
+static int cache_entry_cmp(const void *unused_cmp_data,
+                          const struct cache_entry *ce1,
+                          const struct cache_entry *ce2,
+                          const void *remove)
 {
        /*
         * For remove_name_hash, find the exact entry (pointer equality); for
        if (istate->name_hash_initialized)
                return;
        hashmap_init(&istate->name_hash, (hashmap_cmp_fn) cache_entry_cmp,
-                       istate->cache_nr);
+                       NULL, istate->cache_nr);
        hashmap_init(&istate->dir_hash, (hashmap_cmp_fn) dir_entry_cmp,
-                       istate->cache_nr);
+                       NULL, istate->cache_nr);
 
        if (lookup_lazy_params(istate)) {
                hashmap_disallow_rehash(&istate->dir_hash, 1);