compile fixes for ubuntu 22.04 arm

Author: msotheeswaran-sc

deps/rocksdb/db/db_impl/db_impl_compaction_flush.cc

@@ -1066,7 +1066,7 @@ Status DBImpl::CompactFilesImpl(
   }
 
   if (output_file_names != nullptr) {
-    for (const auto newf : c->edit()->GetNewFiles()) {
+    for (const auto& newf : c->edit()->GetNewFiles()) {
       (*output_file_names)
           .push_back(TableFileName(c->immutable_cf_options()->cf_paths,
                                    newf.second.fd.GetNumber(),
@@ -1158,7 +1158,7 @@ void DBImpl::NotifyOnCompactionBegin(ColumnFamilyData* cfd, Compaction* c,
         }
       }
     }
-    for (const auto newf : c->edit()->GetNewFiles()) {
+    for (const auto& newf : c->edit()->GetNewFiles()) {
       info.output_files.push_back(TableFileName(
           c->immutable_cf_options()->cf_paths, newf.second.fd.GetNumber(),
           newf.second.fd.GetPathId()));

deps/rocksdb/options/options_parser.cc

@@ -409,7 +409,7 @@ Status RocksDBOptionsParser::EndSection(
       return s;
     }
   } else if (section == kOptionSectionVersion) {
-    for (const auto pair : opt_map) {
+    for (const auto& pair : opt_map) {
       if (pair.first == "rocksdb_version") {
         s = ParseVersionNumber(pair.first, pair.second, 3, db_version);
         if (!s.ok()) {