diff --git a/cpukit/libcsupport/src/__usrenv.c b/cpukit/libcsupport/src/__usrenv.c
index b9ae5c509b..a69d384ee9 100644
--- a/cpukit/libcsupport/src/__usrenv.c
+++ b/cpukit/libcsupport/src/__usrenv.c
@@ -52,6 +52,11 @@ static int null_handler_open(
   mode_t mode
 )
 {
+  (void) iop;
+  (void) path;
+  (void) oflag;
+  (void) mode;
+
   return -1;
 }
 
@@ -60,6 +65,9 @@ static int null_handler_fstat(
   struct stat *buf
 )
 {
+  (void) pathloc;
+  (void) buf;
+
   return -1;
 }
 
@@ -86,6 +94,8 @@ static void null_op_lock_or_unlock(
   const rtems_filesystem_mount_table_entry_t *mt_entry
 )
 {
+  (void) mt_entry;
+
   /* Do nothing */
 }
 
@@ -97,6 +107,12 @@ static int null_op_mknod(
   dev_t dev
 )
 {
+  (void) parentloc;
+  (void) name;
+  (void) namelen;
+  (void) mode;
+  (void) dev;
+
   return -1;
 }
 
@@ -105,6 +121,9 @@ static int null_op_rmnod(
   const rtems_filesystem_location_info_t *loc
 )
 {
+  (void) parentloc;
+  (void) loc;
+
   return -1;
 }
 
@@ -115,6 +134,11 @@ static int null_op_link(
   size_t namelen
 )
 {
+  (void) parentloc;
+  (void) targetloc;
+  (void) name;
+  (void) namelen;
+
   return -1;
 }
 
@@ -123,6 +147,9 @@ static int null_op_fchmod(
   mode_t mode
 )
 {
+  (void) pathloc;
+  (void) mode;
+
   return -1;
 }
 
@@ -132,6 +159,10 @@ static int null_op_chown(
   gid_t group
 )
 {
+  (void) loc;
+  (void) owner;
+  (void) group;
+
   return -1;
 }
 
@@ -139,6 +170,8 @@ static int null_op_clonenode(
   rtems_filesystem_location_info_t *loc
 )
 {
+  (void) loc;
+
   return -1;
 }
 
@@ -147,6 +180,9 @@ static int null_op_mount(
   const void *data
 )
 {
+  (void) mt_entry;
+  (void) data;
+
   return -1;
 }
 
@@ -154,6 +190,8 @@ static int null_op_unmount(
   rtems_filesystem_mount_table_entry_t *mt_entry
 )
 {
+  (void) mt_entry;
+
   return -1;
 }
 
@@ -161,6 +199,8 @@ static void null_op_fsunmount_me(
   rtems_filesystem_mount_table_entry_t *mt_entry
 )
 {
+  (void) mt_entry;
+
   /* Do nothing */
 }
 
@@ -169,6 +209,9 @@ static int null_op_utimens(
   struct timespec times[2]
 )
 {
+  (void) loc;
+  (void) times;
+
   return -1;
 }
 
@@ -179,6 +222,11 @@ static int null_op_symlink(
   const char *target
 )
 {
+  (void) parentloc;
+  (void) name;
+  (void) namelen;
+  (void) target;
+
   return -1;
 }
 
@@ -188,6 +236,10 @@ static ssize_t null_op_readlink(
   size_t bufsize
 )
 {
+  (void) loc;
+  (void) buf;
+  (void) bufsize;
+
   return -1;
 }
 
@@ -199,6 +251,12 @@ static int null_op_rename(
   size_t namelen
 )
 {
+  (void) oldparentloc;
+  (void) oldloc;
+  (void) newparentloc;
+  (void) name;
+  (void) namelen;
+
   return -1;
 }
 
@@ -207,6 +265,9 @@ static int null_op_statvfs(
   struct statvfs *__restrict buf
 )
 {
+  (void) loc;
+  (void) buf;
+
   return -1;
 }
 
diff --git a/cpukit/libcsupport/src/consolesimple.c b/cpukit/libcsupport/src/consolesimple.c
index 017c3d3f6b..f398bc74fe 100644
--- a/cpukit/libcsupport/src/consolesimple.c
+++ b/cpukit/libcsupport/src/consolesimple.c
@@ -41,6 +41,8 @@ static ssize_t _Console_simple_Write(
   size_t         count
 )
 {
+  (void) iop;
+
   const char *buf;
   ssize_t     i;
   ssize_t     n;
diff --git a/cpukit/libcsupport/src/consolesimpleread.c b/cpukit/libcsupport/src/consolesimpleread.c
index 1b5793fe64..31968fa99f 100644
--- a/cpukit/libcsupport/src/consolesimpleread.c
+++ b/cpukit/libcsupport/src/consolesimpleread.c
@@ -36,6 +36,8 @@ ssize_t _Console_simple_Read(
   size_t         count
 )
 {
+  (void) iop;
+
   char    *buf;
   ssize_t  i;
   ssize_t  n;
diff --git a/cpukit/libcsupport/src/gcovfork.c b/cpukit/libcsupport/src/gcovfork.c
index 1520ddfd00..21606656d5 100644
--- a/cpukit/libcsupport/src/gcovfork.c
+++ b/cpukit/libcsupport/src/gcovfork.c
@@ -48,6 +48,9 @@ int __gcov_execl( const char *, char *, ... );
 
 int __gcov_execl( const char *path, char *arg, ... )
 {
+  (void) path;
+  (void) arg;
+
   rtems_set_errno_and_return_minus_one( ENOSYS );
 }
 
@@ -55,6 +58,9 @@ int __gcov_execlp( const char *, char *, ... );
 
 int __gcov_execlp( const char *path, char *arg, ... )
 {
+  (void) path;
+  (void) arg;
+
   rtems_set_errno_and_return_minus_one( ENOSYS );
 }
 
@@ -62,6 +68,9 @@ int __gcov_execle( const char *, char *, ... );
 
 int __gcov_execle( const char *path, char *arg, ... )
 {
+  (void) path;
+  (void) arg;
+
   rtems_set_errno_and_return_minus_one( ENOSYS );
 }
 
@@ -69,6 +78,9 @@ int __gcov_execv( const char *, char *const[] );
 
 int __gcov_execv( const char *path, char *const argv[] )
 {
+  (void) path;
+  (void) argv;
+
   rtems_set_errno_and_return_minus_one( ENOSYS );
 }
 
@@ -76,6 +88,9 @@ int __gcov_execvp( const char *, char *const[] );
 
 int __gcov_execvp( const char *path, char *const argv[] )
 {
+  (void) path;
+  (void) argv;
+
   rtems_set_errno_and_return_minus_one( ENOSYS );
 }
 
@@ -83,6 +98,10 @@ int __gcov_execve( const char *, char *const[], char *const[] );
 
 int __gcov_execve( const char *path, char *const argv[], char *const envp[] )
 {
+  (void) path;
+  (void) argv;
+  (void) envp;
+
   rtems_set_errno_and_return_minus_one( ENOSYS );
 }
 
diff --git a/cpukit/libcsupport/src/newlibc_reent.c b/cpukit/libcsupport/src/newlibc_reent.c
index 19feaf7ff1..b9cb134897 100644
--- a/cpukit/libcsupport/src/newlibc_reent.c
+++ b/cpukit/libcsupport/src/newlibc_reent.c
@@ -48,6 +48,8 @@ void newlib_terminate_hook(
 )
 {
 #ifdef _REENT_THREAD_LOCAL
+  (void) current_task;
+
   _reclaim_reent(NULL);
 #else
   _reclaim_reent(current_task->libc_reent);
diff --git a/cpukit/libcsupport/src/printerfprintfputc.c b/cpukit/libcsupport/src/printerfprintfputc.c
index 5d14c48768..c011fa9081 100644
--- a/cpukit/libcsupport/src/printerfprintfputc.c
+++ b/cpukit/libcsupport/src/printerfprintfputc.c
@@ -45,6 +45,9 @@ static _READ_WRITE_RETURN_TYPE fprintf_putc_write(
   _READ_WRITE_BUFSIZE_TYPE  n
 )
 {
+  (void) ptr;
+  (void) cookie;
+
   _READ_WRITE_RETURN_TYPE i;
   _READ_WRITE_RETURN_TYPE m;
 
diff --git a/cpukit/libcsupport/src/printertask.c b/cpukit/libcsupport/src/printertask.c
index 8e0900d3c6..c56732e629 100644
--- a/cpukit/libcsupport/src/printertask.c
+++ b/cpukit/libcsupport/src/printertask.c
@@ -59,6 +59,8 @@ static void printer_task_acquire(
   rtems_interrupt_lock_context *lock_context
 )
 {
+  (void) ctx;
+
   rtems_interrupt_lock_acquire( &ctx->lock, lock_context );
 }
 
@@ -67,6 +69,8 @@ static void printer_task_release(
   rtems_interrupt_lock_context *lock_context
 )
 {
+  (void) ctx;
+
   rtems_interrupt_lock_release( &ctx->lock, lock_context );
 }
 
@@ -75,6 +79,8 @@ static printer_task_buffer *printer_task_get_buffer(
   rtems_chain_control        *chain
 )
 {
+  (void) ctx;
+
   rtems_interrupt_lock_context  lock_context;
   printer_task_buffer          *buffer;
 
diff --git a/cpukit/libcsupport/src/sup_fs_deviceio.c b/cpukit/libcsupport/src/sup_fs_deviceio.c
index 7b43013d6f..3229f398cb 100644
--- a/cpukit/libcsupport/src/sup_fs_deviceio.c
+++ b/cpukit/libcsupport/src/sup_fs_deviceio.c
@@ -49,6 +49,9 @@ int rtems_deviceio_open(
   rtems_device_minor_number minor
 )
 {
+  (void) path;
+  (void) oflag;
+
   rtems_status_code status;
   rtems_libio_open_close_args_t args;
 
diff --git a/cpukit/libcsupport/src/termios.c b/cpukit/libcsupport/src/termios.c
index c34d2180b5..39a496a0c5 100644
--- a/cpukit/libcsupport/src/termios.c
+++ b/cpukit/libcsupport/src/termios.c
@@ -332,6 +332,9 @@ deviceAcquireMutex(
   rtems_interrupt_lock_context *lock_context
 )
 {
+  (void) ctx;
+  (void) lock_context;
+
   rtems_mutex_lock (&ctx->lock.mutex);
 }
 
@@ -341,6 +344,8 @@ deviceReleaseMutex(
   rtems_interrupt_lock_context *lock_context
 )
 {
+  (void) lock_context;
+
   rtems_mutex_unlock (&ctx->lock.mutex);
 }
 
@@ -1329,6 +1334,9 @@ rtems_termios_iproc_status_code rtems_termios_default_isig_handler(
   struct rtems_termios_tty *tty
 )
 {
+  (void) c;
+  (void) tty;
+
   return RTEMS_TERMIOS_IPROC_CONTINUE;
 }
 
@@ -2088,6 +2096,9 @@ static int
 rtems_termios_imfs_open (rtems_libio_t *iop,
   const char *path, int oflag, mode_t mode)
 {
+  (void) path;
+  (void) oflag;
+
   rtems_termios_device_node *device_node;
   rtems_libio_open_close_args_t args;
   struct rtems_termios_tty *tty;
diff --git a/cpukit/libcsupport/src/termiosinitialize.c b/cpukit/libcsupport/src/termiosinitialize.c
index 56e5301021..be35311e45 100644
--- a/cpukit/libcsupport/src/termiosinitialize.c
+++ b/cpukit/libcsupport/src/termiosinitialize.c
@@ -30,6 +30,8 @@ rtems_termios_device_lock_acquire_default(
   rtems_interrupt_lock_context *lock_context
 )
 {
+  (void) ctx;
+
   rtems_interrupt_lock_acquire (&ctx->lock.interrupt, lock_context);
 }
 
@@ -39,5 +41,7 @@ rtems_termios_device_lock_release_default(
   rtems_interrupt_lock_context *lock_context
 )
 {
+  (void) ctx;
+
   rtems_interrupt_lock_release (&ctx->lock.interrupt, lock_context);
 }