diff --git a/platform/src/key_keeper.cpp b/platform/src/key_keeper.cpp
index d573112..ec17040 100644
--- a/platform/src/key_keeper.cpp
+++ b/platform/src/key_keeper.cpp
@@ -465,7 +465,7 @@ static void key_keeper_free_serialized(void* data)
 
 static MESA_htable_handle create_hash_table(unsigned int slot_size, unsigned int expire_seconds)
 {
-	int ret = 0;
+	UNUSED	int ret = 0;
 	unsigned max_num = slot_size * 4;
 	MESA_htable_handle htable = MESA_htable_born();
 	ret = __wrapper_MESA_htable_set_opt_int(htable, MHO_SCREEN_PRINT_CTRL, 0);
diff --git a/platform/src/ssl_sess_cache.cpp b/platform/src/ssl_sess_cache.cpp
index 93cf070..cc41a3c 100644
--- a/platform/src/ssl_sess_cache.cpp
+++ b/platform/src/ssl_sess_cache.cpp
@@ -45,7 +45,8 @@ static struct asn1_sess * ssl_sess_serialize(SSL_SESSION * sess)
 {
 	struct asn1_sess * result = ALLOC(struct asn1_sess, 1);
 
-	int i = i2d_SSL_SESSION(sess, NULL), j=0;
+	int i = i2d_SSL_SESSION(sess, NULL);
+	UNUSED	int j=0;
 	result->size = (size_t) i;
 	unsigned char* temp=NULL;
 	assert(i > 0);
@@ -129,7 +130,7 @@ static long sess_cache_set_cb(void * data, const uchar * key, uint size, void *
 	struct asn1_sess * new_asn1 = args->new_sess;
 	struct asn1_sess * cur_asn1 = (struct asn1_sess *) data;
 
-	int ret = 0;
+	UNUSED int ret = 0;
 	if (cur_asn1 != NULL)
 	{
 		free(cur_asn1->buff);
@@ -149,7 +150,7 @@ static long sess_cache_set_cb(void * data, const uchar * key, uint size, void *
 static size_t upsess_mk_key(struct sockaddr * res, socklen_t addrlen, const char * sni, unsigned char ** key_buf)
 {
 	size_t key_size = 0;
-	unsigned short port;
+	unsigned short port=0;
 		
 	char *s = NULL;
 	switch(res->sa_family) {
@@ -299,7 +300,7 @@ struct sess_cache * ssl_sess_cache_create(unsigned int slot_size, unsigned int e
 {
 	struct sess_cache * cache = ALLOC(struct sess_cache, 1);
 	unsigned max_num = slot_size * 4;
-	int ret = 0;
+	UNUSED int ret = 0;
 
 	MESA_htable_handle htable = MESA_htable_born();
 	ret = __wrapper_MESA_htable_set_opt(htable, MHO_SCREEN_PRINT_CTRL, 0);
diff --git a/platform/test/test_tfe_rpc.cpp b/platform/test/test_tfe_rpc.cpp
index c75e336..609b391 100644
--- a/platform/test/test_tfe_rpc.cpp
+++ b/platform/test/test_tfe_rpc.cpp
@@ -209,6 +209,7 @@ static void tfe_rpc_on_succ(void* result, void* user)
 	printf("len is %d\n", len);
 	struct keyring* kyr = get_keyring_from_response(data);
 	assert(kyr!=NULL);
+	(void)kyr;
 	//add to hash table
 }
 
diff --git a/plugin/business/pangu-http/src/test_pattern_replace.cpp b/plugin/business/pangu-http/src/test_pattern_replace.cpp
index 573bf9a..ba1bc51 100644
--- a/plugin/business/pangu-http/src/test_pattern_replace.cpp
+++ b/plugin/business/pangu-http/src/test_pattern_replace.cpp
@@ -12,7 +12,7 @@ TEST(PatternReplace, Grouping1)
 	const char* find="(?<name1>John)|(?<name2>李梅梅)|(?<name3>Jake)";
 	const char* replacement="${name1:+Joseph:${name2:+王桃花:Keith}}";
 	const char* input="John loves 李梅梅, 李梅梅 loves Jake and Jake doesn't care about John and 李梅梅.";
-	const char* expect="Joseph loves 王桃花, 王桃花 loves Keith and Keith doesn't care about Joseph and 王桃花.";
+	__attribute__((unused)) const char* expect="Joseph loves 王桃花, 王桃花 loves Keith and Keith doesn't care about Joseph and 王桃花.";
 	char* output=NULL;
 	size_t output_sz=0;