added debug symbols in debug mode

mindspore/lite/minddata/CMakeLists.txt

@@ -3,7 +3,10 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC -Wall -Wno-deprecated-declarations")
-set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -s")
+set(CMAKE_CXX_FLAGS_DEBUG "$ENV{CXXFLAGS} -O0 -g2 -ggdb")
+if (CMAKE_BUILD_TYPE EQUAL "DEBUG")
+      set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -s")
+endif()
 
 AUX_SOURCE_DIRECTORY(${MINDDATA_DIR}/core MINDDATA_CORE_SRC_FILES)
 list(REMOVE_ITEM MINDDATA_CORE_SRC_FILES "${MINDDATA_DIR}/core/client.cc")