diff --git a/core/dev/slip.c b/core/dev/slip.c
index 6eef63094..be2552f0d 100644
--- a/core/dev/slip.c
+++ b/core/dev/slip.c
@@ -29,7 +29,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * @(#)$Id: slip.c,v 1.4 2007/02/01 14:04:06 bg- Exp $
+ * @(#)$Id: slip.c,v 1.5 2007/11/18 12:27:44 ksb Exp $
  */
 
 
@@ -228,7 +228,7 @@ PROCESS_THREAD(slip_process, ev, data)
     uip_len = slip_poll_handler(&uip_buf[UIP_LLH_LEN],
 				UIP_BUFSIZE - UIP_LLH_LEN);
 
-    if(uip_len == 4 && strncmp(&uip_buf[UIP_LLH_LEN], "?IPA", 4) == 0) {
+    if(uip_len == 4 && strncmp((char*)&uip_buf[UIP_LLH_LEN], "?IPA", 4) == 0) {
       char buf[8];
       memcpy(&buf[0], "=IPA", 4);
       memcpy(&buf[4], &uip_hostaddr, 4);
diff --git a/core/dev/spi.h b/core/dev/spi.h
index 5e097e58e..ea4b9e3a5 100644
--- a/core/dev/spi.h
+++ b/core/dev/spi.h
@@ -1,5 +1,5 @@
 /* -*- C -*- */
-/* @(#)$Id: spi.h,v 1.3 2007/11/13 06:45:29 fros4943 Exp $ */
+/* @(#)$Id: spi.h,v 1.4 2007/11/18 12:27:44 ksb Exp $ */
 
 #ifndef SPI_H
 #define SPI_H
@@ -37,7 +37,7 @@ void spi_init(void);
 	do {\
     	SPI_TXBUF = 0;\
 		SPI_WAITFOREORx();\
-		SPI_RXBUF;\
+		(void)SPI_RXBUF;\
 	} while(0)
 
 #define FASTSPI_TX_MANY(p,c)\
@@ -148,7 +148,7 @@ void spi_init(void);
 	 do {\
 		  SPI_ENABLE();\
 		  FASTSPI_RX_ADDR(CC2420_RXFIFO);\
-		  SPI_RXBUF;\
+		  (void)SPI_RXBUF;\
 		  FASTSPI_RX(b);\
   		  clock_delay(1);\
 		  SPI_DISABLE();\
@@ -160,7 +160,7 @@ void spi_init(void);
 		  u8_t spiCnt;\
 		  SPI_ENABLE();\
 		  FASTSPI_RX_ADDR(CC2420_RXFIFO);\
-		  SPI_RXBUF;\
+		  (void)SPI_RXBUF;\
 		  for (spiCnt = 0; spiCnt < (c); spiCnt++) {\
 				FASTSPI_RX(((u8_t*)(p))[spiCnt]);\
 		  }\
@@ -175,7 +175,7 @@ void spi_init(void);
 		  u8_t spiCnt;\
 		  SPI_ENABLE();\
 		  FASTSPI_RX_ADDR(CC2420_RXFIFO);\
-		  SPI_RXBUF;\
+		  (void)SPI_RXBUF;\
 		  for (spiCnt = 0; spiCnt < (c); spiCnt++) {\
 				FASTSPI_RX_GARBAGE();\
 		  }\
diff --git a/core/sys/autostart.c b/core/sys/autostart.c
index 1514b0fe3..8bd2ccfa4 100644
--- a/core/sys/autostart.c
+++ b/core/sys/autostart.c
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: autostart.c,v 1.2 2007/03/25 17:16:57 adamdunkels Exp $
+ * $Id: autostart.c,v 1.3 2007/11/18 12:27:45 ksb Exp $
  */
 
 /**
@@ -50,7 +50,7 @@
 
 /*---------------------------------------------------------------------------*/
 void
-autostart_start(struct process *processes[])
+autostart_start(struct process * const processes[])
 {
   int i;
   
@@ -61,7 +61,7 @@ autostart_start(struct process *processes[])
 }
 /*---------------------------------------------------------------------------*/
 void
-autostart_exit(struct process *processes[])
+autostart_exit(struct process * const processes[])
 {
   int i;
   
diff --git a/core/sys/autostart.h b/core/sys/autostart.h
index 7d5a64842..ae8c57a3f 100644
--- a/core/sys/autostart.h
+++ b/core/sys/autostart.h
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: autostart.h,v 1.2 2007/08/30 14:39:17 matsutsuka Exp $
+ * $Id: autostart.h,v 1.3 2007/11/18 12:27:45 ksb Exp $
  */
 
 /**
@@ -46,7 +46,7 @@
 #if ! CC_NO_VA_ARGS
 #if AUTOSTART_ENABLE
 #define AUTOSTART_PROCESSES(...)					\
-const struct process *autostart_processes[] = {__VA_ARGS__, NULL}
+struct process * const autostart_processes[] = {__VA_ARGS__, NULL}
 #else /* AUTOSTART_ENABLE */
 #define AUTOSTART_PROCESSES(...)					\
 extern int _dummy
@@ -55,9 +55,9 @@ extern int _dummy
 #error "C compiler must support __VA_ARGS__ macro"
 #endif
 
-extern const struct process *autostart_processes[];
+extern struct process * const autostart_processes[];
 
-void autostart_start(struct process *processes[]);
-void autostart_exit(struct process *processes[]);
+void autostart_start(struct process * const processes[]);
+void autostart_exit(struct process * const processes[]);
 
 #endif /* __AUTOSTART_H__ */
diff --git a/core/sys/profile-aggregates.c b/core/sys/profile-aggregates.c
index 2d34a9f15..4cd3bc232 100644
--- a/core/sys/profile-aggregates.c
+++ b/core/sys/profile-aggregates.c
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: profile-aggregates.c,v 1.3 2007/11/17 18:07:40 adamdunkels Exp $
+ * $Id: profile-aggregates.c,v 1.4 2007/11/18 12:27:45 ksb Exp $
  */
 
 /**
@@ -128,8 +128,8 @@ profile_aggregates_print(void)
 #endif
 
   printf("Memory for aggregates: %d * %d = %d\n",
-	 sizeof(struct aggregate), aggregates_list_ptr,
-	 sizeof(struct aggregate) * aggregates_list_ptr);
+	 (int)sizeof(struct aggregate), aggregates_list_ptr,
+	 (int)sizeof(struct aggregate) * aggregates_list_ptr);
 }
 /*---------------------------------------------------------------------------*/
 #if DETAILED_AGGREGATES