diff --git a/cmake/define.inc b/cmake/define.inc
index 69807a8a05564c3f5b107f0dcc3ab81d031d31eb..20acb680fb5ed12277c8294d38deb0651d1ac5ba 100755
--- a/cmake/define.inc
+++ b/cmake/define.inc
@@ -57,7 +57,7 @@ IF (TD_LINUX_64)
   ADD_DEFINITIONS(-D_M_X64)
   ADD_DEFINITIONS(-D_TD_LINUX_64)
   MESSAGE(STATUS "linux64 is defined")
-  SET(COMMON_FLAGS "-std=gnu99 -Wall -Werror -fPIC -gdwarf-2 -msse4.2 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
+  SET(COMMON_FLAGS "-Wall -Werror -fPIC -gdwarf-2 -msse4.2 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
   ADD_DEFINITIONS(-DUSE_LIBICONV)
 
   IF (JEMALLOC_ENABLED)
@@ -70,7 +70,7 @@ IF (TD_LINUX_32)
   ADD_DEFINITIONS(-D_TD_LINUX_32)
   ADD_DEFINITIONS(-DUSE_LIBICONV)
   MESSAGE(STATUS "linux32 is defined")
-  SET(COMMON_FLAGS "-std=gnu99 -Wall -Werror -fPIC -fsigned-char -munaligned-access -fpack-struct=8 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
+  SET(COMMON_FLAGS "-Wall -Werror -fPIC -fsigned-char -munaligned-access -fpack-struct=8 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
 ENDIF ()
 
 IF (TD_ARM_64)
@@ -78,7 +78,7 @@ IF (TD_ARM_64)
   ADD_DEFINITIONS(-D_TD_ARM_)
   ADD_DEFINITIONS(-DUSE_LIBICONV)
   MESSAGE(STATUS "arm64 is defined")
-  SET(COMMON_FLAGS "-std=gnu99 -Wall -Werror -fPIC -fsigned-char -fpack-struct=8 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
+  SET(COMMON_FLAGS "-Wall -Werror -fPIC -fsigned-char -fpack-struct=8 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
 ENDIF ()
 
 IF (TD_ARM_32)
@@ -86,7 +86,7 @@ IF (TD_ARM_32)
   ADD_DEFINITIONS(-D_TD_ARM_)
   ADD_DEFINITIONS(-DUSE_LIBICONV)
   MESSAGE(STATUS "arm32 is defined")
-  SET(COMMON_FLAGS "-std=gnu99 -Wall -Werror -fPIC -fsigned-char -fpack-struct=8 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE -Wno-pointer-to-int-cast -Wno-int-to-pointer-cast -Wno-incompatible-pointer-types ")
+  SET(COMMON_FLAGS "-Wall -Werror -fPIC -fsigned-char -fpack-struct=8 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE -Wno-pointer-to-int-cast -Wno-int-to-pointer-cast -Wno-incompatible-pointer-types ")
 ENDIF ()
 
 IF (TD_MIPS_64)
@@ -94,7 +94,7 @@ IF (TD_MIPS_64)
   ADD_DEFINITIONS(-D_TD_MIPS_64)
   ADD_DEFINITIONS(-DUSE_LIBICONV)
   MESSAGE(STATUS "mips64 is defined")
-  SET(COMMON_FLAGS "-std=gnu99 -Wall -Werror -fPIC -fsigned-char -fpack-struct=8 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
+  SET(COMMON_FLAGS "-Wall -Werror -fPIC -fsigned-char -fpack-struct=8 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
 ENDIF ()
 
 IF (TD_MIPS_32)
@@ -102,7 +102,7 @@ IF (TD_MIPS_32)
   ADD_DEFINITIONS(-D_TD_MIPS_32)
   ADD_DEFINITIONS(-DUSE_LIBICONV)
   MESSAGE(STATUS "mips32 is defined")
-  SET(COMMON_FLAGS "-std=gnu99 -Wall -Werror -fPIC -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
+  SET(COMMON_FLAGS "-Wall -Werror -fPIC -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
 ENDIF ()
 
 IF (TD_APLHINE)
@@ -147,7 +147,7 @@ IF (TD_DARWIN_64)
   ADD_DEFINITIONS(-D_REENTRANT -D__USE_POSIX -D_LIBC_REENTRANT)
   ADD_DEFINITIONS(-DUSE_LIBICONV)
   MESSAGE(STATUS "darwin64 is defined")
-  SET(COMMON_FLAGS "-std=gnu99 -Wall -Werror -Wno-missing-braces -fPIC -msse4.2 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
+  SET(COMMON_FLAGS "-Wall -Werror -Wno-missing-braces -fPIC -msse4.2 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
   IF (TD_MEMORY_SANITIZER)
     SET(DEBUG_FLAGS "-fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all -fsanitize=float-divide-by-zero -fsanitize=float-cast-overflow -fno-sanitize=null -fno-sanitize=alignment -O0 -g3 -DDEBUG")
   ELSE ()
diff --git a/cmake/env.inc b/cmake/env.inc
index 17ec6a535e4697b0ab3acbbb30b8c14bf328a8a2..fa15ec6aee01a619139417fceb21b3a71bd96364 100755
--- a/cmake/env.inc
+++ b/cmake/env.inc
@@ -34,13 +34,14 @@ ENDIF ()
 #
 
 # Set compiler options
-SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${COMMON_FLAGS} ${DEBUG_FLAGS}")
-SET(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ${COMMON_FLAGS} ${RELEASE_FLAGS}")
+SET(COMMON_C_FLAGS "${COMMON_FLAGS} -std=gnu99")
+SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${COMMON_C_FLAGS} ${DEBUG_FLAGS}")
+SET(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ${COMMON_C_FLAGS} ${RELEASE_FLAGS}")
 
 # Set c++ compiler options
-# SET(COMMON_CXX_FLAGS "${COMMON_FLAGS} -std=c++11")
-# SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${COMMON_CXX_FLAGS} ${DEBUG_FLAGS}")
-# SET(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${COMMON_CXX_FLAGS} ${RELEASE_FLAGS}")
+SET(COMMON_CXX_FLAGS "${COMMON_FLAGS} -std=c++11 -Wno-unused-function")
+SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${COMMON_CXX_FLAGS} ${DEBUG_FLAGS}")
+SET(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${COMMON_CXX_FLAGS} ${RELEASE_FLAGS}")
 
 IF (${CMAKE_BUILD_TYPE} MATCHES "Debug")
   SET(CMAKE_BUILD_TYPE "Debug")
diff --git a/src/client/tests/timeParseTest.cpp b/src/client/tests/timeParseTest.cpp
index ba06a6b9aa775dc9cad6191e5d85f6475c017f1b..3cc6d541e002a9167b5e2668d4914ad1aa6f94f0 100644
--- a/src/client/tests/timeParseTest.cpp
+++ b/src/client/tests/timeParseTest.cpp
@@ -98,7 +98,7 @@ TEST(testCase, parse_time) {
   taosParseTime(t41, &time, strlen(t41), TSDB_TIME_PRECISION_MILLI, 0);
   EXPECT_EQ(time, 852048000999);
 
-  int64_t k = timezone;
+  // int64_t k = timezone;
   char    t42[] = "1997-1-1T0:0:0.999999999Z";
   taosParseTime(t42, &time, strlen(t42), TSDB_TIME_PRECISION_MILLI, 0);
   EXPECT_EQ(time, 852048000999 - timezone * MILLISECOND_PER_SECOND);
@@ -163,7 +163,7 @@ TEST(testCase, parse_time) {
   taosParseTime(t13, &time, strlen(t13), TSDB_TIME_PRECISION_MILLI, 0);
   EXPECT_EQ(time, -28800 * MILLISECOND_PER_SECOND);
 
-  char* t = "2021-01-08T02:11:40.000+00:00";
+  char t[] = "2021-01-08T02:11:40.000+00:00";
   taosParseTime(t, &time, strlen(t), TSDB_TIME_PRECISION_MILLI, 0);
   printf("%ld\n", time);
 }
diff --git a/src/query/tests/astTest.cpp b/src/query/tests/astTest.cpp
index ce7b2f94a177576c8046b299bcb2e695fb5ead2d..1143d00e8da9e77cd0f740d98fe77ffd1beac4bc 100644
--- a/src/query/tests/astTest.cpp
+++ b/src/query/tests/astTest.cpp
@@ -10,6 +10,7 @@
 
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wwrite-strings"
+#pragma GCC diagnostic ignored "-Wunused-function"
 
 typedef struct ResultObj {
   int32_t numOfResult;
diff --git a/src/query/tests/histogramTest.cpp b/src/query/tests/histogramTest.cpp
index 3088d6f8078483c39ec3780250e8bfa2d613f218..0266ecffc11348dcd0184030584ed7b721d39aff 100644
--- a/src/query/tests/histogramTest.cpp
+++ b/src/query/tests/histogramTest.cpp
@@ -5,6 +5,10 @@
 
 #include "taos.h"
 #include "qHistogram.h"
+
+#pragma GCC diagnostic ignored "-Wunused-function"
+#pragma GCC diagnostic ignored "-Wunused-variable"
+
 namespace {
 void doHistogramAddTest() {
   SHistogramInfo* pHisto = NULL;
diff --git a/src/query/tests/patternMatchTest.cpp b/src/query/tests/patternMatchTest.cpp
index f3e0d3e119259d0a7cc8a94a6b43f4c71558bf78..091604c65c0e8b7fcf998fdd69f6f82f101f8157 100644
--- a/src/query/tests/patternMatchTest.cpp
+++ b/src/query/tests/patternMatchTest.cpp
@@ -6,6 +6,9 @@
 #include "qAggMain.h"
 #include "tcompare.h"
 
+#pragma GCC diagnostic ignored "-Wunused-function"
+#pragma GCC diagnostic ignored "-Wunused-variable"
+
 TEST(testCase, patternMatchTest) {
   SPatternCompareInfo info = PATTERN_COMPARE_INFO_INITIALIZER;
 
diff --git a/src/query/tests/percentileTest.cpp b/src/query/tests/percentileTest.cpp
index 104bfb3c06a9613bafcd4e0b3f39af4f9d102b04..1b6951201af5908378fb253b38cea01de1210d57 100644
--- a/src/query/tests/percentileTest.cpp
+++ b/src/query/tests/percentileTest.cpp
@@ -7,6 +7,9 @@
 
 #include "qPercentile.h"
 
+#pragma GCC diagnostic ignored "-Wunused-function"
+#pragma GCC diagnostic ignored "-Wunused-variable"
+
 namespace {
 tMemBucket *createBigIntDataBucket(int32_t start, int32_t end) {
   tMemBucket *pBucket = tMemBucketCreate(sizeof(int64_t), TSDB_DATA_TYPE_BIGINT, start, end);
diff --git a/src/query/tests/resultBufferTest.cpp b/src/query/tests/resultBufferTest.cpp
index 491d75ccb9c8104a8e7760aa15918bd212646de6..54ac0bf4e5c78f2fcc7f0e3271eb3409ea072db7 100644
--- a/src/query/tests/resultBufferTest.cpp
+++ b/src/query/tests/resultBufferTest.cpp
@@ -6,6 +6,9 @@
 #include "taos.h"
 #include "tsdb.h"
 
+#pragma GCC diagnostic ignored "-Wunused-function"
+#pragma GCC diagnostic ignored "-Wunused-variable"
+
 namespace {
 // simple test
 void simpleTest() {
diff --git a/src/query/tests/tsBufTest.cpp b/src/query/tests/tsBufTest.cpp
index dd7f03a494ac37229b117c678fc461d455067850..04c5a152520d08329408253af271c4d43c5c0fe3 100644
--- a/src/query/tests/tsBufTest.cpp
+++ b/src/query/tests/tsBufTest.cpp
@@ -9,6 +9,10 @@
 #include "ttoken.h"
 #include "tutil.h"
 
+#pragma GCC diagnostic ignored "-Wunused-function"
+#pragma GCC diagnostic ignored "-Wunused-variable"
+#pragma GCC diagnostic ignored "-Wunused-but-set-variable"
+
 namespace {
 /**
  *
diff --git a/src/query/tests/unitTest.cpp b/src/query/tests/unitTest.cpp
index d2b058cf7cb9400c64149ff8f18f68788735ba96..fcfed49140d04d19658518544aee7c8937bfc309 100644
--- a/src/query/tests/unitTest.cpp
+++ b/src/query/tests/unitTest.cpp
@@ -6,14 +6,17 @@
 #include "taos.h"
 #include "tsdb.h"
 
+#pragma GCC diagnostic ignored "-Wwrite-strings"
+#pragma GCC diagnostic ignored "-Wunused-function"
+#pragma GCC diagnostic ignored "-Wunused-variable"
+#pragma GCC diagnostic ignored "-Wunused-but-set-variable"
+#pragma GCC diagnostic ignored "-Wsign-compare"
+
 #include "../../client/inc/tscUtil.h"
 #include "tutil.h"
 #include "tvariant.h"
 #include "ttokendef.h"
 
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wwrite-strings"
-
 namespace {
 int32_t testValidateName(char* name) {
   SStrToken token = {0};