Index: Makefile.in
==================================================================
--- Makefile.in
+++ Makefile.in
@@ -371,10 +371,11 @@
   $(TOP)/src/test_pcache.c \
   $(TOP)/src/test_quota.c \
   $(TOP)/src/test_rtree.c \
   $(TOP)/src/test_schema.c \
   $(TOP)/src/test_server.c \
+  $(TOP)/src/test_superlock.c \
   $(TOP)/src/test_stat.c \
   $(TOP)/src/test_tclvar.c \
   $(TOP)/src/test_thread.c \
   $(TOP)/src/test_vfs.c \
   $(TOP)/src/test_wsd.c

Index: src/test_superlock.c
==================================================================
--- src/test_superlock.c
+++ src/test_superlock.c
@@ -100,11 +100,10 @@
   SuperlockBusy *pBusy            /* Busy handler wrapper object */
 ){
   int rc;                         /* Return code */
   sqlite3_file *fd = 0;           /* Main database file handle */
   void volatile *p = 0;           /* Pointer to first page of shared memory */
-  int nBusy = 0;                  /* Number of calls already made to xBusy */
 
   /* Obtain a pointer to the sqlite3_file object open on the main db file. */
   rc = sqlite3_file_control(db, "main", SQLITE_FCNTL_FILE_POINTER, (void *)&fd);
   if( rc!=SQLITE_OK ) return rc;
 
@@ -309,10 +308,11 @@
   rc = sqlite3demo_superlock(zPath, zVfs, xBusy, &busy, &pLock);
   assert( rc==SQLITE_OK || pLock==0 );
   assert( rc!=SQLITE_OK || pLock!=0 );
 
   if( rc!=SQLITE_OK ){
+    extern const char *sqlite3ErrStr(int);
     Tcl_ResetResult(interp);
     Tcl_AppendResult(interp, sqlite3ErrStr(rc), 0);
     return TCL_ERROR;
   }