Index: tool/mkkeywordhash.c
==================================================================
--- tool/mkkeywordhash.c
+++ tool/mkkeywordhash.c
@@ -4,10 +4,29 @@
 ** parser token codes.
 */
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+
+/*
+** A header comment placed at the beginning of generated code.
+*/
+static const char zHdr[] = 
+  "/***** This file contains automatically generated code ******\n"
+  "**\n"
+  "** The code in this file has been automatically generated by\n"
+  "**\n"
+  "**     $Header: /home/drh/sqlite/trans/cvs/sqlite/sqlite/tool/mkkeywordhash.c,v 1.25 2007/02/21 16:44:33 drh Exp $\n"
+  "**\n"
+  "** The code in this file implements a function that determines whether\n"
+  "** or not a given identifier is really an SQL keyword.  The same thing\n"
+  "** might be implemented more directly using a hand-written hash table.\n"
+  "** But by using this automatically generated code, the size of the code\n"
+  "** is substantially reduced.  This is important for embedded applications\n"
+  "** on platforms with limited memory.\n"
+  "*/\n"
+;
 
 /*
 ** All the keywords of the SQL language are stored as in a hash
 ** table composed of instances of the following structure.
 */
@@ -408,10 +427,11 @@
     aKeywordTable[i].iNext = aHash[h];
     aHash[h] = i+1;
   }
 
   /* Begin generating code */
+  printf("%s", zHdr);
   printf("/* Hash score: %d */\n", bestCount);
   printf("static int keywordCode(const char *z, int n){\n");
 
   printf("  static const char zText[%d] =\n", nChar+1);
   for(i=j=0; i<NKEYWORD; i++){