diff --git a/include/nng/supplemental/nanolib/conf.h b/include/nng/supplemental/nanolib/conf.h
index 925847760..74413f559 100644
--- a/include/nng/supplemental/nanolib/conf.h
+++ b/include/nng/supplemental/nanolib/conf.h
@@ -352,8 +352,8 @@ typedef enum {
 
 struct conf_parquet_encryption {
 	bool        enable;
-	const char *key_id;
-	const char *key;
+	char *key_id;
+	char *key;
 	cipher_type type;
 };
 
diff --git a/include/nng/supplemental/nanolib/log.h b/include/nng/supplemental/nanolib/log.h
index 9da8e20c6..2800c6b44 100644
--- a/include/nng/supplemental/nanolib/log.h
+++ b/include/nng/supplemental/nanolib/log.h
@@ -94,7 +94,6 @@ NNG_DECL void log_clear_callback();
 #define log_warn(...)
 #define log_error(...)
 #define log_fatal(...)
-
 #endif
 
 
@@ -102,4 +101,4 @@ NNG_DECL void log_clear_callback();
 }
 #endif
 
-#endif
\ No newline at end of file
+#endif
diff --git a/src/core/platform.h b/src/core/platform.h
index 6d5565b19..03ac3abcf 100644
--- a/src/core/platform.h
+++ b/src/core/platform.h
@@ -447,7 +447,7 @@ extern int nni_plat_udp_sockname(nni_plat_udp *, nni_sockaddr *);
 // in APIs to transport file descriptors, or across a fork/exec boundary (so
 // that child processes may use these with socket to inherit a socket that is
 // connected to the parent.)
-extern int nni_socket_pair(int *);
+extern int nni_socket_pair(int [2]);
 
 //
 // File/Store Support
diff --git a/src/core/socket.c b/src/core/socket.c
index b5d911ea9..e44725fdc 100644
--- a/src/core/socket.c
+++ b/src/core/socket.c
@@ -674,7 +674,7 @@ nni_sock_replace(nni_sock *sock, nni_sock *new)
 {
 	nni_ctx      *ctx;
 	nni_ctx      *nctx;
-	size_t   sz;
+	size_t   sz = 0;
 
 	nni_mtx_lock(&sock_lk);
 
diff --git a/src/mqtt/protocol/exchange/exchange_server.c b/src/mqtt/protocol/exchange/exchange_server.c
index 4c329d17a..38bf3018c 100644
--- a/src/mqtt/protocol/exchange/exchange_server.c
+++ b/src/mqtt/protocol/exchange/exchange_server.c
@@ -532,6 +532,7 @@ exchange_client_get_msgs_fuzz(void *arg, uint64_t start, uint64_t end, uint32_t
 	return 0;
 }
 
+#ifdef SUPP_PARQUET
 static char *
 get_file_bname(char *fpath)
 {
@@ -552,7 +553,6 @@ get_file_bname(char *fpath)
 	return bname;
 }
 
-#ifdef SUPP_PARQUET
 static int
 get_parquet_files_raw(uint32_t sz, char **fnames, char ***file_raws)
 {
@@ -697,7 +697,6 @@ decToHex(unsigned char decimal, char *hexadecimal)
 static int
 fuzz_search_result_cat(nng_msg **msgList, uint32_t count, cJSON *obj)
 {
-	char *buf = NULL;
 	uint32_t sz = 0;
 	uint32_t pos = 0;
 	uint32_t diff = 0;
@@ -724,7 +723,7 @@ fuzz_search_result_cat(nng_msg **msgList, uint32_t count, cJSON *obj)
 				log_warn("Failed to allocate memory for file payload\n");
 				return -1;
 			}
-			for (int j = 0; j < diff; ++j) {
+			for (uint32_t j = 0; j < diff; ++j) {
 				char *tmpch = (char *)nng_msg_payload_ptr(msgList[i]);
 				char hex[2];
 				hex[0] = '0';
@@ -742,13 +741,13 @@ fuzz_search_result_cat(nng_msg **msgList, uint32_t count, cJSON *obj)
 		pos += diff;
 	}
 
-	cJSON *mqs_obj = cJSON_CreateStringArray(mqdata, count);
+	cJSON *mqs_obj = cJSON_CreateStringArray((const char * const*)mqdata, count);
 	if (!mqs_obj) {
 		return -1;
 	}
 	cJSON_AddItemToObject(obj, "mq", mqs_obj);
 
-	for (int i = 0; i < count; ++i) {
+	for (uint32_t i = 0; i < count; ++i) {
 		nng_free(mqdata[i], 0);
 	}
 	nng_free(mqdata, sizeof(char *) * count);
@@ -766,7 +765,6 @@ ex_query_recv_cb(void *arg)
 	exchange_sock_t       *sock = p->sock;
 
 	nni_msg            *msg;
-	size_t              len;
 	uint8_t            *body;
 	nni_msg            *tar_msg = NULL;
 	int ret;
@@ -781,7 +779,6 @@ ex_query_recv_cb(void *arg)
 	nni_msg_set_pipe(msg, nni_pipe_id(p->pipe));
 
 	body    = nni_msg_body(msg);
-	len     = nni_msg_len(msg);
 
 	nni_mtx_lock(&sock->mtx);
 
@@ -819,11 +816,11 @@ ex_query_recv_cb(void *arg)
 				return;
 			}
 			for (uint32_t j = 0; j < diff; ++j) {
-				char *tmpch = nng_msg_payload_ptr(tar_msg);
+				char *tmpch = (char *)nng_msg_payload_ptr(tar_msg);
 				if (j == 0) {
-					sprintf(mqdata, "%02x", tmpch[j] & 0xff);
+					sprintf(mqdata, "%02x", (unsigned char)(tmpch[j] & 0xff));
 				} else {
-					sprintf(mqdata, "%s%02x", mqdata, tmpch[j] & 0xff);
+					sprintf(mqdata, "%s%02x", mqdata, (unsigned char)(tmpch[j] & 0xff));
 				}
 			}
 			cJSON *mqs_obj = cJSON_CreateString(mqdata);
@@ -912,6 +909,8 @@ ex_query_send_cb(void *arg)
 {
 	exchange_pipe_t       *p    = arg;
 	exchange_sock_t       *sock = p->sock;
+
+	NNI_ARG_UNUSED(sock);
 }
 
 static int
diff --git a/src/mqtt/protocol/exchange/exchange_server_test.c b/src/mqtt/protocol/exchange/exchange_server_test.c
index ffc2e8cba..a9329ce90 100644
--- a/src/mqtt/protocol/exchange/exchange_server_test.c
+++ b/src/mqtt/protocol/exchange/exchange_server_test.c
@@ -8,9 +8,9 @@
 
 #define UNUSED(x) ((void) x)
 
-static inline void free_msg_list(nng_msg **msgList, nng_msg *msg, int *lenp, int freeMsg)
+static inline void free_msg_list(nng_msg **msgList, nng_msg *msg, uint32_t *lenp, int freeMsg)
 {
-	for (int i = 0; i < *lenp; i++) {
+	for (uint32_t i = 0; i < *lenp; i++) {
 		if (freeMsg) {
 			nng_msg_free(msgList[i]);
 		}
@@ -23,11 +23,11 @@ static inline void free_msg_list(nng_msg **msgList, nng_msg *msg, int *lenp, int
 		nng_free(msgList, sizeof(nng_msg *) * (*lenp));
 	}
 	if (lenp != NULL) {
-		nng_free(lenp, sizeof(int));
+		nng_free(lenp, sizeof(uint32_t));
 	}
 }
 
-static inline void client_get_msgs(nng_socket sock, uint64_t startKey, uint64_t endKey, int *lenp, nng_msg ***msgList)
+static inline void client_get_msgs(nng_socket sock, uint64_t startKey, uint64_t endKey, uint32_t *lenp, nng_msg ***msgList)
 {
 	nni_aio *aio = NULL;
 	NUTS_PASS(nng_aio_alloc(&aio, NULL, NULL));
@@ -92,7 +92,7 @@ client_publish(nng_socket sock, const char *topic, uint64_t key, uint8_t *payloa
 	nng_send_aio(sock, aio);
 	nng_aio_wait(aio);
 
-	int *lenp = NULL;
+	uint32_t *lenp = NULL;
 	nng_msg **msgList = (nng_msg **)nng_aio_get_prov_data(aio);
 	nng_msg *msg = nng_aio_get_msg(aio);
 	if (msgList != NULL && msg != NULL) {
@@ -144,17 +144,17 @@ test_exchange_client(void)
 	rv = exchange_client_get_msg_by_key(nni_sock_proto_data(nsock), key, &msg);
 	NUTS_TRUE(rv == 0 && msg != NULL);
 
-	int *lenp;
+	uint32_t *lenp;
 	nng_msg **msgList = NULL;
 	rv = exchange_client_get_msgs_by_key(nni_sock_proto_data(nsock), key, 1, &msgList);
 	NUTS_TRUE(rv == 0 && msgList != NULL);
-	lenp = nng_alloc(sizeof(int));
+	lenp = nng_alloc(sizeof(uint32_t));
 	*lenp = 1;
 	free_msg_list(msgList, NULL, lenp, 0);
 	msgList = NULL;
 
 	/* Use aio recv to get msgs by key */
-	lenp = nng_alloc(sizeof(int));
+	lenp = nng_alloc(sizeof(uint32_t));
 	*lenp = 0;
 	client_get_msgs(sock, key, 0, lenp, &msgList);
 	NUTS_TRUE(*lenp == 1 && msgList != NULL);
@@ -166,13 +166,13 @@ test_exchange_client(void)
 	NUTS_TRUE(rv == -1 && msgList == NULL);
 
 	/* fuzz search start */
-	lenp = nng_alloc(sizeof(int));
+	lenp = nng_alloc(sizeof(uint32_t));
 	rv = exchange_client_get_msgs_fuzz(nni_sock_proto_data(nsock), 0, 3, lenp, &msgList);
 	NUTS_TRUE(rv == 0 && *lenp == 1 && msgList != NULL);
 	free_msg_list(msgList, NULL, lenp, 0);
 
 	msgList = NULL;
-	int len = 0;
+	uint32_t len = 0;
 	rv = exchange_client_get_msgs_fuzz(nni_sock_proto_data(nsock), 2, 3, &len, &msgList);
 	NUTS_TRUE(rv != 0 && len == 0 && msgList == NULL);
 	/* fuzz search end */
@@ -183,7 +183,7 @@ test_exchange_client(void)
 	}
 
 	/* Use aio recv to get msgs by key */
-	lenp = nng_alloc(sizeof(int));
+	lenp = nng_alloc(sizeof(uint32_t));
 	*lenp = 0;
 	client_get_msgs(sock, 1, 10, lenp, &msgList);
 	NUTS_TRUE(*lenp == 9 && msgList != NULL);
diff --git a/src/sp/transport/mqtt/broker_tcp.c b/src/sp/transport/mqtt/broker_tcp.c
index 8211a6c12..1b6b95646 100644
--- a/src/sp/transport/mqtt/broker_tcp.c
+++ b/src/sp/transport/mqtt/broker_tcp.c
@@ -73,7 +73,7 @@ struct tcptran_ep {
 	bool                 closed;
 	nng_url             *url;
 	nng_sockaddr         src;
-	const conf          *conf;
+	conf          *conf;
 	int                  refcnt; // active pipes
 	nni_aio             *useraio;
 	nni_aio             *connaio;
diff --git a/src/sp/transport/mqtts/broker_tls.c b/src/sp/transport/mqtts/broker_tls.c
index f44ee588b..7bcdae782 100644
--- a/src/sp/transport/mqtts/broker_tls.c
+++ b/src/sp/transport/mqtts/broker_tls.c
@@ -75,7 +75,7 @@ struct tlstran_ep {
 	bool                 closed;
 	nng_url             *url;
 	nng_sockaddr         src;
-	const conf          *conf;
+	conf                *conf;
 	nng_sockaddr         sa;
 	int                  refcnt; // active pipes
 	int                  authmode;
diff --git a/src/supplemental/nanolib/cmd.c b/src/supplemental/nanolib/cmd.c
index 7f08480d9..4e6c4f009 100644
--- a/src/supplemental/nanolib/cmd.c
+++ b/src/supplemental/nanolib/cmd.c
@@ -90,8 +90,9 @@ nano_cmd_run(const char *cmd)
 	if (error != 0) {
 		log_warn("command '%s' returned an error", cmd);
 
-		if (cmd_output_len > 0)
+		if (cmd_output_len > 0) {
 			log_debug("          %s", cmd_output_buff);
+		}
 		ret = -1;
 	}
 
diff --git a/src/supplemental/nanolib/conf.c b/src/supplemental/nanolib/conf.c
index bdb750639..dd6bb7088 100644
--- a/src/supplemental/nanolib/conf.c
+++ b/src/supplemental/nanolib/conf.c
@@ -50,9 +50,11 @@ static void conf_sqlite_destroy(conf_sqlite *sqlite);
 static void conf_web_hook_parse(conf_web_hook *webhook, const char *path);
 static void conf_web_hook_destroy(conf_web_hook *web_hook);
 
+#if defined(ENABLE_LOG)
 static void conf_log_init(conf_log *log);
 static void conf_log_destroy(conf_log *log);
 static void conf_log_parse(conf_log *log, const char *path);
+#endif
 
 #if defined(SUPP_RULE_ENGINE)
 static void conf_rule_repub_parse(conf_rule *cr, char *path);
diff --git a/src/supplemental/nanolib/conf_ver2.c b/src/supplemental/nanolib/conf_ver2.c
index 6f5ead9aa..a2f5e5fe1 100644
--- a/src/supplemental/nanolib/conf_ver2.c
+++ b/src/supplemental/nanolib/conf_ver2.c
@@ -1463,6 +1463,9 @@ conf_acl_parse_ver2(conf *config, cJSON *jso)
 			}
 		}
 	}
+#else
+	NNI_ARG_UNUSED(config);
+	NNI_ARG_UNUSED(jso);
 #endif
 }
 
diff --git a/src/supplemental/nanolib/mqtt_db.c b/src/supplemental/nanolib/mqtt_db.c
index ba16b2220..3c4a4af9e 100644
--- a/src/supplemental/nanolib/mqtt_db.c
+++ b/src/supplemental/nanolib/mqtt_db.c
@@ -1088,7 +1088,7 @@ collect_retain_well(void **vec, dbtree_node *node)
 		nodes_t = NULL;
 	}
 
-	return vec;
+	return (struct nng_msg **)vec;
 }
 
 /**
@@ -1118,7 +1118,7 @@ collect_retains(void **vec, dbtree_node **nodes,
 		dbtree_node **child = node_t->child;
 
 		if (is_well(*topic_queue)) {
-			vec = collect_retain_well(vec, node_t);
+			vec = (void **)collect_retain_well(vec, node_t);
 			break;
 		} else if (is_plus(*topic_queue)) {
 			if (*(topic_queue + 1) == NULL) {
@@ -1177,7 +1177,7 @@ collect_retains(void **vec, dbtree_node **nodes,
 		}
 	}
 
-	return vec;
+	return (struct nng_msg **)vec;
 }
 
 nng_msg **
@@ -1203,12 +1203,12 @@ dbtree_find_retain(dbtree *db, char *topic)
 
 	while (*topic_queue && (!cvector_empty(nodes))) {
 
-		rets = collect_retains(rets, nodes, &nodes_t, topic_queue);
+		rets = collect_retains((void **)rets, nodes, &nodes_t, topic_queue);
 		topic_queue++;
 		if (*topic_queue == NULL) {
 			break;
 		}
-		rets = collect_retains(rets, nodes_t, &nodes, topic_queue);
+		rets = collect_retains((void **)rets, nodes_t, &nodes, topic_queue);
 		topic_queue++;
 	}
 
diff --git a/src/supplemental/nanolib/ringbuffer/ringbuffer.c b/src/supplemental/nanolib/ringbuffer/ringbuffer.c
index 0903d3f25..ab72cebc4 100644
--- a/src/supplemental/nanolib/ringbuffer/ringbuffer.c
+++ b/src/supplemental/nanolib/ringbuffer/ringbuffer.c
@@ -225,7 +225,7 @@ static int write_msgs_to_file(ringBuffer_t *rb)
 		nng_free(file, sizeof(ringBufferFile_t));
 		return -1;
 	}
-	for (int i = 0; i < rb->cap; i++) {
+	for (unsigned int i = 0; i < rb->cap; i++) {
 		file->keys[i] = rb->msgs[i].key;
 	}
 
@@ -239,7 +239,7 @@ static int write_msgs_to_file(ringBuffer_t *rb)
 	}
 
 	/* TODO: Path will return by parquet */
-	sprintf(file->path, "/tmp/nanomq/RB%d", nng_timestamp());
+	sprintf(file->path, "/tmp/nanomq/RB%ld", nng_timestamp());
 
 	cvector_push_back(rb->files, file);
 
@@ -418,7 +418,7 @@ int ringBuffer_release(ringBuffer_t *rb)
 	}
 
 	if (rb->files != NULL) {
-		for (int i = 0; i < cvector_size(rb->files); i++) {
+		for (int i = 0; i < (int)cvector_size(rb->files); i++) {
 			nng_free(rb->files[i]->keys, sizeof(uint64_t) * rb->cap);
 			nng_free(rb->files[i]->path, sizeof(char) * 256);
 			nng_free(rb->files[i], sizeof(ringBufferFile_t));
diff --git a/src/supplemental/nanolib/ringbuffer/ringbuffer_test.c b/src/supplemental/nanolib/ringbuffer/ringbuffer_test.c
index 37cab323e..7ae3aeb55 100644
--- a/src/supplemental/nanolib/ringbuffer/ringbuffer_test.c
+++ b/src/supplemental/nanolib/ringbuffer/ringbuffer_test.c
@@ -36,9 +36,9 @@ void test_ringBuffer_release(void)
 	return;
 }
 
-static inline void free_msg_list(nng_msg **msgList, nng_msg *msg, int *lenp, int freeMsg)
+static inline void free_msg_list(nng_msg **msgList, nng_msg *msg, uint32_t *lenp, int freeMsg)
 {
-	for (int i = 0; i < *lenp; i++) {
+	for (uint32_t i = 0; i < *lenp; i++) {
 		if (freeMsg) {
 			nng_msg_free(msgList[i]);
 		}
@@ -51,7 +51,7 @@ static inline void free_msg_list(nng_msg **msgList, nng_msg *msg, int *lenp, int
 		nng_free(msgList, sizeof(nng_msg *) * (*lenp));
 	}
 	if (lenp != NULL) {
-		nng_free(lenp, sizeof(int));
+		nng_free(lenp, sizeof(uint32_t));
 	}
 }
 
@@ -137,7 +137,7 @@ void test_ringBuffer_enqueue(void)
 	nng_msg *msg = nng_aio_get_msg(aio);
 	NUTS_TRUE(msg != NULL);
 
-	int *listLen = nng_msg_get_proto_data(msg);
+	uint32_t *listLen = nng_msg_get_proto_data(msg);
 	NUTS_TRUE(listLen != NULL);
 	NUTS_TRUE(*listLen == 10);
 
@@ -423,15 +423,15 @@ void test_ringBuffer_search_msgs_by_key()
 	NUTS_TRUE(ringBuffer_search_msgs_by_key(rb, 0, -1, &msgList) == -1);
 	NUTS_TRUE(ringBuffer_search_msgs_by_key(rb, 0, 10, NULL) == -1);
 
-	int *lenp = NULL;
-	lenp = nng_alloc(sizeof(int));
+	uint32_t *lenp = NULL;
+	lenp = nng_alloc(sizeof(uint32_t));
 	NUTS_TRUE(ringBuffer_search_msgs_by_key(rb, 0, 10, &msgList) == 0);
 	*lenp = 10;
 	free_msg_list(msgList, NULL, lenp, 0);
 
 
 	NUTS_TRUE(ringBuffer_search_msgs_by_key(rb, 5, 10, &msgList) == 0);
-	lenp = nng_alloc(sizeof(int));
+	lenp = nng_alloc(sizeof(uint32_t));
 	*lenp = 10;
 	free_msg_list(msgList, NULL, lenp, 0);
 
@@ -465,12 +465,12 @@ void test_ringBuffer_search_msgs_fuzz()
 		ret = ringBuffer_search_msgs_fuzz(rb, start, end, lenp, &msgList);
 		if (start / 10 == end / 10 && start % 10 != 0 && end % 10 != 0) {
 			NUTS_TRUE(ret == -1);
-			nng_free(lenp, sizeof(int));
+			nng_free(lenp, sizeof(uint32_t));
 			continue;
 		} else {
 			NUTS_TRUE(ret == 0);
 		}
-		NUTS_TRUE(*lenp == ((end / 10  - (start % 10 == 0 ? start / 10 : start / 10 + 1)) + 1));
+		NUTS_TRUE(*lenp == (uint32_t)((end / 10  - (start % 10 == 0 ? start / 10 : start / 10 + 1)) + 1));
 		free_msg_list(msgList, NULL, lenp, 0);
 	}
 
diff --git a/src/supplemental/util/platform.c b/src/supplemental/util/platform.c
index 5eb25fda0..b4fa5e629 100644
--- a/src/supplemental/util/platform.c
+++ b/src/supplemental/util/platform.c
@@ -179,7 +179,7 @@ nng_random(void)
 }
 
 int
-nng_socket_pair(int *fds)
+nng_socket_pair(int fds[2])
 {
 	return (nni_socket_pair(fds));
 }