fixes for faiss tests to pass

bindings/cpp/CMakeLists.txt

@@ -34,6 +34,7 @@ set(SVS_RUNTIME_SOURCES
     src/IndexSVSFlatImpl.cpp
     src/IndexSVSVamanaImpl.cpp
     src/training.cpp
+    src/vamana_index.cpp
     src/dynamic_vamana_index.cpp
     src/flat_index.cpp
 )

bindings/cpp/src/training.cpp

@@ -21,6 +21,8 @@
 namespace svs {
 namespace runtime {
 
+LeanVecTrainingData::~LeanVecTrainingData() = default;
+
 Status LeanVecTrainingData::build(
     LeanVecTrainingData** training_data,
     size_t dim,
@@ -43,6 +45,11 @@ Status LeanVecTrainingData::destroy(LeanVecTrainingData* training_data) noexcept
     SVS_RUNTIME_TRY_END
 }
 
+Status LeanVecTrainingData::save(std::ostream& /*out*/) const noexcept {
+    // providing an implementation of a virtual function to anchor vtable
+    return {ErrorCode::NOT_IMPLEMENTED, "Not implemented"};
+}
+
 Status
 LeanVecTrainingData::load(LeanVecTrainingData** training_data, std::istream& in) noexcept {
     SVS_RUNTIME_TRY_BEGIN

bindings/cpp/src/vamana_index.cpp

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2025 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "vamana_index.h"
+
+namespace svs {
+namespace runtime {
+
+VamanaIndex::~VamanaIndex() = default;
+
+}
+} // namespace svs