Follow template instantiation.
@@ -636,4 +636,6 @@ namespace attribute {
}
-template class vespalib::hash_map<search::EnumStoreIndex, search::EnumStoreIndex>;
+template class vespalib::hash_map<search::EnumStoreIndex, search::EnumStoreIndex,
+ vespalib::hash<search::EnumStoreIndex>, std::equal_to<search::EnumStoreIndex>,
+ vespalib::hashtable_base::and_modulator>;
