add new subdir target

src/CMakeLists.txt

@@ -6,6 +6,7 @@ set(CMAKE_COMPILE_WARNING_AS_ERROR ON)
 
 if(MSVC)
     add_subdirectory(dll)
+    add_subdirectory(builddll)
 else()
     #file(GLOB CPP_SOURCES *.cpp)
     set(CPP_SOURCES abstract_data_store.cpp ann_exception.cpp disk_utils.cpp 

src/builddll/CMakeLists.txt

@@ -0,0 +1,50 @@
+#Copyright(c) Microsoft Corporation.All rights reserved.
+#Licensed under the MIT                        license.
+# Dedicated cmake for tcmalloc index build
+
+add_definitions(-DRELEASE_UNUSED_TCMALLOC_MEMORY_AT_CHECKPOINTS)
+
+set(DISKANN_DLL_TCMALLOC_LINK_OPTIONS libtcmalloc_minimal_for_dll)
+set(DISKANN_DLL_NAME "diskann_build_dll")
+
+if (DISKANN_USE_STATIC_LIB)
+    add_library(${DISKANN_DLL_NAME} STATIC ../abstract_data_store.cpp ../partition.cpp ../pq.cpp ../pq_flash_index.cpp ../logger.cpp ../utils.cpp
+        ../windows_aligned_file_reader.cpp ../distance.cpp ../memory_mapper.cpp ../index.cpp 
+        ../in_mem_data_store.cpp ../in_mem_graph_store.cpp ../math_utils.cpp ../disk_utils.cpp ../filter_utils.cpp
+        ../ann_exception.cpp ../natural_number_set.cpp ../natural_number_map.cpp ../scratch.cpp ../index_factory.cpp ../abstract_index.cpp)
+else()
+    add_library(${DISKANN_DLL_NAME} SHARED dllmain.cpp ../abstract_data_store.cpp ../partition.cpp ../pq.cpp ../pq_flash_index.cpp ../logger.cpp ../utils.cpp
+        ../windows_aligned_file_reader.cpp ../distance.cpp ../memory_mapper.cpp ../index.cpp 
+        ../in_mem_data_store.cpp ../in_mem_graph_store.cpp ../math_utils.cpp ../disk_utils.cpp ../filter_utils.cpp
+        ../ann_exception.cpp ../natural_number_set.cpp ../natural_number_map.cpp ../scratch.cpp ../index_factory.cpp ../abstract_index.cpp)
+endif()
+
+set(TARGET_DIR "$<$<CONFIG:Debug>:${CMAKE_LIBRARY_OUTPUT_DIRECTORY_DEBUG}>$<$<CONFIG:Release>:${CMAKE_LIBRARY_OUTPUT_DIRECTORY_RELEASE}>")
+
+if (DISKANN_USE_STATIC_LIB)
+    target_compile_definitions(${DISKANN_DLL_NAME} PRIVATE _NODLL)
+else()
+    set(DISKANN_DLL_IMPLIB "${TARGET_DIR}/${DISKANN_DLL_NAME}.lib")
+    target_compile_definitions(${DISKANN_DLL_NAME} PRIVATE _USRDLL _WINDLL)
+endif()
+
+target_compile_options(${DISKANN_DLL_NAME} PRIVATE /GL)
+target_include_directories(${DISKANN_DLL_NAME} PRIVATE ${DISKANN_MKL_INCLUDE_DIRECTORIES})
+
+if (NOT DEFINED DISKANN_USE_STATIC_LIB)
+    target_link_options(${DISKANN_DLL_NAME} PRIVATE /DLL /IMPLIB:${DISKANN_DLL_IMPLIB} /LTCG)
+endif()
+
+target_link_libraries(${DISKANN_DLL_NAME} PRIVATE ${DISKANN_MKL_LINK_LIBRARIES})
+target_link_libraries(${DISKANN_DLL_NAME} PRIVATE synchronization.lib)
+
+target_link_libraries(${DISKANN_DLL_NAME} PUBLIC ${DISKANN_DLL_TCMALLOC_LINK_OPTIONS})
+
+# Copy OpenMP DLL and PDB.
+set(RUNTIME_FILES_TO_COPY ${OPENMP_WINDOWS_RUNTIME_FILES} ${TCMALLOC_WINDOWS_RUNTIME_FILES})
+
+foreach(RUNTIME_FILE ${RUNTIME_FILES_TO_COPY})
+    add_custom_command(TARGET ${DISKANN_DLL_NAME}
+                       POST_BUILD
+                       COMMAND ${CMAKE_COMMAND} -E copy "${RUNTIME_FILE}" "${TARGET_DIR}")
+endforeach()