diff -rauN smartmontools-6.0/os_darwin.cpp smartmontools-6.0-p1/os_darwin.cpp
--- smartmontools-6.0/os_darwin.cpp	2009-07-15 21:59:19.000000000 +0200
+++ smartmontools-6.0-p1/os_darwin.cpp	2013-01-17 18:56:46.000000000 +0100
@@ -72,9 +72,8 @@
 
 // tries to guess device type given the name (a path).  See utility.h
 // for return values.
-int guess_device_type (const char* dev_name) {
+int guess_device_type (const char* dev_name __attribute__((__unused__))) {
   // Only ATA is supported right now, so that's what it'd better be.
-  dev_name = dev_name;  // suppress unused warning.
   return CONTROLLER_ATA;
 }
 
@@ -422,57 +421,35 @@
 
 // There's no special handling needed for hidden devices, the kernel
 // must deal with them.
-int escalade_command_interface(int fd, int escalade_port, int escalade_type,
-			       smart_command_set command, int select,
-			       char *data)
+int escalade_command_interface(int fd __attribute__((__unused__)), int escalade_port __attribute__((__unused__)), int escalade_type __attribute__((__unused__)),
+			       smart_command_set command __attribute__((__unused__)), int select __attribute__((__unused__)),
+			       char *data __attribute__((__unused__)))
 {
-  fd = fd;
-  escalade_port = escalade_port;
-  escalade_type = escalade_type;
-  command = command;
-  select = select;
-  data = data;
   return -1;
 }
 
-int areca_command_interface(int fd, int escalade_port, 
-			       smart_command_set command, int select,
-			       char *data)
+int areca_command_interface(int fd __attribute__((__unused__)), int escalade_port __attribute__((__unused__)), 
+			       smart_command_set command __attribute__((__unused__)), int select __attribute__((__unused__)),
+			       char *data __attribute__((__unused__)))
 {
-  fd = fd;
-  escalade_port = escalade_port;
-  command = command;
-  select = select;
-  data = data;
   return -1;
 }
 
 
 
 
-int marvell_command_interface(int fd, smart_command_set command,
-		      int select, char *data)
+int marvell_command_interface(int fd __attribute__((__unused__)), smart_command_set command __attribute__((__unused__)),
+		      int select __attribute__((__unused__)), char *data __attribute__((__unused__)))
 { 
-  fd = fd;
-  command = command;
-  select = select;
-  data = data;
   return -1;
 }
 
-int highpoint_command_interface(int fd, smart_command_set command, int select, char *data)
+int highpoint_command_interface(int fd __attribute__((__unused__)), smart_command_set command __attribute__((__unused__)), int select __attribute__((__unused__)), char *data __attribute__((__unused__)))
 {
-  fd = fd;
-  command = command;
-  select = select;
-  data = data;
   return -1;
 }
 
 // Interface to SCSI devices.  See os_linux.c
-int do_scsi_cmnd_io(int fd, struct scsi_cmnd_io * iop, int report) {
-  fd = fd;
-  iop = iop;
-  report = report;
+int do_scsi_cmnd_io(int fd __attribute__((__unused__)), struct scsi_cmnd_io * iop __attribute__((__unused__)), int report __attribute__((__unused__))) {
   return -ENOSYS;
 }