diff --git a/CMakeLists.txt b/CMakeLists.txt
index aad9c5dd54e..cda70d5b74a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.14)
+cmake_minimum_required(VERSION 3.14.1)
 project (MindSpore)
 
 if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.3.0)
diff --git a/build.sh b/build.sh
index d2f1d68238b..3be1a58bee6 100755
--- a/build.sh
+++ b/build.sh
@@ -236,7 +236,7 @@ checkopts()
       z)
         eval ARG=\$\{$OPTIND\}
         if [[ -n $ARG && $ARG != -* ]]; then
-          OPTARG=$ARG
+          OPTARG="$ARG"
           check_on_off $OPTARG z
           OPTIND=$((OPTIND + 1))
         else
diff --git a/mindspore/core/gvar/CMakeLists.txt b/mindspore/core/gvar/CMakeLists.txt
index 26ff5ff870c..7da661b2b65 100644
--- a/mindspore/core/gvar/CMakeLists.txt
+++ b/mindspore/core/gvar/CMakeLists.txt
@@ -1,5 +1,6 @@
 file(GLOB_RECURSE MS_GVAR_SRC_LIST RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.cc)
 set_property(SOURCE ${MS_GVAR_SRC_LIST} PROPERTY COMPILE_DEFINITIONS SUBMODULE_ID=mindspore::SubModuleId::SM_COMMON)
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_FORTIFY_SOURCE=2 -O2")
 if (CMAKE_SYSTEM_NAME MATCHES "Windows")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-attributes -DHAVE_SNPRINTF")
     add_compile_definitions(BUILDING_DLL)