diff --git a/example/inquiry.c b/example/inquiry.c
index 61461f5e8..371f9a128 100644
--- a/example/inquiry.c
+++ b/example/inquiry.c
@@ -67,7 +67,7 @@ int getDeviceIndexForAddress( bd_addr_t addr){
 	return -1;
 }
 
-void next(){
+void next(void){
 	int i;
 	int found = 0;
 	
@@ -226,4 +226,5 @@ int main (int argc, const char * argv[]){
 	bt_send_cmd(&btstack_set_power_mode, HCI_POWER_ON );
 	run_loop_execute();
 	bt_close();
+	return 0;
 }
\ No newline at end of file
diff --git a/example/l2cap-server.c b/example/l2cap-server.c
index 4e44a07f6..da00a68ab 100644
--- a/example/l2cap-server.c
+++ b/example/l2cap-server.c
@@ -191,4 +191,5 @@ int main (int argc, const char * argv[]){
 	bt_send_cmd(&btstack_set_power_mode, HCI_POWER_ON );
 	run_loop_execute();
 	bt_close();
+	return 0;
 }
\ No newline at end of file
diff --git a/example/l2cap-throughput.c b/example/l2cap-throughput.c
index f434eeb84..ef229ee9b 100644
--- a/example/l2cap-throughput.c
+++ b/example/l2cap-throughput.c
@@ -53,11 +53,11 @@ uint32_t counter = 0;
 
 timer_source_t timer;
 
-void update_packet(){
+void update_packet(void){
     net_store_32( packet, 0, counter++);
 }
 
-void prepare_packet(){
+void prepare_packet(void){
     int i;
     counter = 0;
     net_store_32( packet, 0, 0);
@@ -223,4 +223,5 @@ int main (int argc, const char * argv[]){
 	
 	run_loop_execute();
 	bt_close();
+	return 0;
 }
\ No newline at end of file
diff --git a/example/rfcomm-cat.c b/example/rfcomm-cat.c
index b783566e2..b18cb5e8d 100644
--- a/example/rfcomm-cat.c
+++ b/example/rfcomm-cat.c
@@ -59,12 +59,7 @@ char pin[17];
 void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
 	bd_addr_t event_addr;
 	uint16_t mtu;
-	uint16_t psm;
 	uint16_t rfcomm_channel_id;
-	uint16_t rfcomm_channel_nr;
-	uint8_t  credits;
-	static uint32_t packet_counter = 0;
-	static char packet_info[30]; // "packets: 1234567890"
 	
 	switch (packet_type) {
 			
@@ -104,8 +99,6 @@ void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint
 						rfcomm_channel_id = READ_BT_16(packet, 12);
 						mtu = READ_BT_16(packet, 14);
 						printf("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u\n", rfcomm_channel_id, mtu);
-						uint8_t message[] = "Hello World from BTstack!\n";
-						// bt_send_rfcomm(rfcomm_channel_id, message, sizeof(message));
 					}
 					break;
 					
@@ -150,7 +143,6 @@ int main (int argc, const char * argv[]){
 			}
 		} else if (!strcmp(argv[arg], "-p") || !strcmp(argv[arg], "--pin")) {
 			arg++;
-			int pin1,pin2,pin3,pin4;
 			if(arg >= argc) {
 				usage(argv[0]);
 				return 1;
diff --git a/example/rfcomm-echo.c b/example/rfcomm-echo.c
index 4c9b3bfaa..4460e6c85 100644
--- a/example/rfcomm-echo.c
+++ b/example/rfcomm-echo.c
@@ -124,12 +124,8 @@ void create_spp_service(uint8_t *service, int service_id){
 void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
 	bd_addr_t event_addr;
 	uint16_t mtu;
-	uint16_t psm;
-	uint8_t  rfcomm_channel_nr;
+	uint16_t rfcomm_channel_nr;
 	uint16_t rfcomm_channel_id;
-	uint8_t  credits;
-	static uint32_t packet_counter = 0;
-	static char packet_info[30]; // "packets: 1234567890"
 	
 	switch (packet_type) {
 			
@@ -213,7 +209,7 @@ void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint
                         
 						printf("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u\n", rfcomm_channel_id, mtu);
 						uint8_t message[] = "Hello World from BTstack!\n";
-						// bt_send_rfcomm(rfcomm_channel_id, message, sizeof(message));
+						bt_send_rfcomm(rfcomm_channel_id, message, sizeof(message));
 					}
 					break;
 					
diff --git a/example/test.c b/example/test.c
index 3b6ec2bdd..ab51089b3 100644
--- a/example/test.c
+++ b/example/test.c
@@ -174,4 +174,5 @@ int main (int argc, const char * argv[]){
 	bt_send_cmd(&btstack_set_power_mode, HCI_POWER_ON );
 	run_loop_execute();
 	bt_close();
+	return 0;
 }
\ No newline at end of file
diff --git a/src/daemon.c b/src/daemon.c
index c35381228..77e9522bd 100644
--- a/src/daemon.c
+++ b/src/daemon.c
@@ -121,7 +121,7 @@ static void dummy_bluetooth_status_handler(BLUETOOTH_STATE state){
     log_dbg("Bluetooth status: %u\n", state);
 };
 
-static void daemon_no_connections_timeout(void){
+static void daemon_no_connections_timeout(struct timer *ts){
     if (clients_require_power_on()) return;    // false alarm :)
     log_dbg("No active client connection for %u seconds -> POWER OFF\n", DAEMON_NO_ACTIVE_CLIENT_TIMEOUT/1000);
     hci_power_control(HCI_POWER_OFF);
@@ -460,10 +460,12 @@ static void usage(const char * name) {
     log_dbg("    --tcp      use TCP server socket instead of local unix socket\n");
 }
 
+#ifdef USE_BLUETOOL 
 static void * run_loop_thread(void *context){
     run_loop_execute();
     return NULL;
 }
+#endif
 
 int main (int argc,  char * const * argv){
     
diff --git a/src/hci.c b/src/hci.c
index 0f6652bfd..9d6cf3dc3 100644
--- a/src/hci.c
+++ b/src/hci.c
@@ -42,6 +42,10 @@
 #include <string.h>
 #include <stdio.h>
 
+#ifndef EMBEDDED
+#include <unistd.h> // gethostbyname
+#endif
+
 #include "debug.h"
 #include "hci_dump.h"
 
diff --git a/src/hci_transport_h4.c b/src/hci_transport_h4.c
index ca1112ea3..5804ce5b2 100644
--- a/src/hci_transport_h4.c
+++ b/src/hci_transport_h4.c
@@ -192,7 +192,7 @@ static int    h4_open(void *transport_config){
     return 0;
 }
 
-static int    h4_close(void){
+static int    h4_close(void *transport_config){
     // first remove run loop handler
 	run_loop_remove_data_source(hci_transport_h4->ds);