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diff --git a/tools/mhmake/src/flexlexer.h b/tools/mhmake/src/flexlexer.h
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+// -*-C++-*-
+// FlexLexer.h -- define interfaces for lexical analyzer classes generated
+// by flex
+
+// Copyright (c) 1993 The Regents of the University of California.
+// All rights reserved.
+//
+// This code is derived from software contributed to Berkeley by
+// Kent Williams and Tom Epperly.
+//
+//  Redistribution and use in source and binary forms, with or without
+//  modification, are permitted provided that the following conditions
+//  are met:
+
+//  1. Redistributions of source code must retain the above copyright
+//  notice, this list of conditions and the following disclaimer.
+//  2. Redistributions in binary form must reproduce the above copyright
+//  notice, this list of conditions and the following disclaimer in the
+//  documentation and/or other materials provided with the distribution.
+
+//  Neither the name of the University nor the names of its contributors
+//  may be used to endorse or promote products derived from this software
+//  without specific prior written permission.
+
+//  THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+//  IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+//  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+//  PURPOSE.
+
+// This file defines FlexLexer, an abstract class which specifies the
+// external interface provided to flex C++ lexer objects, and yyFlexLexer,
+// which defines a particular lexer class.
+//
+// If you want to create multiple lexer classes, you use the -P flag
+// to rename each yyFlexLexer to some other xxFlexLexer.  You then
+// include <FlexLexer.h> in your other sources once per lexer class:
+//
+//  #undef yyFlexLexer
+//  #define yyFlexLexer xxFlexLexer
+//  #include <FlexLexer.h>
+//
+//  #undef yyFlexLexer
+//  #define yyFlexLexer zzFlexLexer
+//  #include <FlexLexer.h>
+//  ...
+
+#ifndef __FLEX_LEXER_H
+// Never included before - need to define base class.
+#define __FLEX_LEXER_H
+class mhmakefileparser;
+
+#include "refptr.h"
+
+struct YYSTYPE
+{
+  string theString;
+  int ival;
+};
+typedef struct YYSTYPE YYSTYPE;
+
+#include "location.hh"
+
+#include <iostream>
+#  ifndef FLEX_STD
+#    define FLEX_STD std::
+#  endif
+
+extern "C++" {
+
+struct yy_buffer_state;
+typedef struct yy_buffer_state *YY_BUFFER_STATE;
+typedef int yy_state_type;
+
+class FlexLexer {
+public:
+  FlexLexer() : m_BraceIndent(0) {}
+  virtual ~FlexLexer()  { }
+
+  const char* YYText() const  { return yytext; }
+  int YYLeng()  const { return yyleng; }
+
+  virtual void
+    yy_switch_to_buffer( struct yy_buffer_state* new_buffer ) = 0;
+  virtual struct yy_buffer_state*
+    yy_create_buffer( FLEX_STD istream* s, int size ) = 0;
+  virtual void yy_delete_buffer( struct yy_buffer_state* b ) = 0;
+  virtual void yyrestart( FLEX_STD istream* s ) = 0;
+
+  virtual int yylex(YYSTYPE *yylval, yy::location* yylloc) = 0;
+
+  // Switch to new input/output streams.  A nil stream pointer
+  // indicates "keep the current one".
+  virtual void switch_streams( FLEX_STD istream* new_in = 0,
+          FLEX_STD ostream* new_out = 0 ) = 0;
+
+  int debug() const   { return yy_flex_debug; }
+  void set_debug( int flag )  { yy_flex_debug = flag; }
+
+protected:
+  char* yytext;
+  int yyleng;
+  int yy_flex_debug;  // only has effect with -d or "%option debug"
+
+public:
+
+  struct INSTACK
+  {
+    YY_BUFFER_STATE m_BufferState;
+    ifstream m_Stream;
+    string m_FileName;
+    yy::location yylloc;
+    INSTACK(YY_BUFFER_STATE BufferState, const string &FileToOpen, const string &PrevFileName, yy::location *pLocInfo) :
+      m_BufferState(BufferState),
+      m_FileName(PrevFileName),
+      yylloc(*pLocInfo),
+      m_Stream(FileToOpen.c_str(), ios_base::in)
+    {
+    }
+    bool fail() const
+    {
+      return m_Stream.fail();
+    }
+    ifstream *GetStream()
+    {
+      return &m_Stream;
+    }
+  };
+  class mystack: public iterstack<INSTACK*>
+  {
+  public:
+    ~mystack()
+    {
+      iterator It=begin();
+      while (It!=end())
+      {
+        delete *It;
+        It++;
+      }
+    }
+    void pop()
+    {
+      INSTACK *pToRemove=top();
+      iterstack<INSTACK*>::pop();
+      delete pToRemove;  /* Buffer does not need to be deleted because the lexer does this when it calls the pop */
+    }
+  };
+  int m_BraceIndent;
+  size_t m_IndentSkip;
+  iterstack<int> m_IndentStack;
+  bool m_IgnoreIncludeError;
+  string m_InputFileName;
+  string m_curtoken;
+  mystack m_IncludeStack;
+  mhmakefileparser *m_pMakefileParser;
+  mhmakefileparser *GetParser(void)
+  {
+    return m_pMakefileParser;
+  }
+public:
+  string &GetInputFilename(void)
+  {
+    return m_InputFileName;
+  }
+};
+
+}
+
+#if defined(yyFlexLexer) || ! defined(yyFlexLexerOnce)
+// Either this is the first time through (yyFlexLexerOnce not defined),
+// or this is a repeated include to define a different flavor of
+// yyFlexLexer, as discussed in the flex manual.
+#define yyFlexLexerOnce
+
+extern "C++" {
+
+class mhmakeFlexLexer : public FlexLexer {
+public:
+  // arg_yyin and arg_yyout default to the cin and cout, but we
+  // only make that assignment when initializing in yylex().
+  mhmakeFlexLexer( FLEX_STD istream* arg_yyin = 0, FLEX_STD ostream* arg_yyout = 0 );
+
+  virtual ~mhmakeFlexLexer();
+
+  void yy_switch_to_buffer( struct yy_buffer_state* new_buffer );
+  struct yy_buffer_state* yy_create_buffer( FLEX_STD istream* s, int size );
+  void yy_delete_buffer( struct yy_buffer_state* b );
+  void yyrestart( FLEX_STD istream* s );
+
+  void yypush_buffer_state( struct yy_buffer_state* new_buffer );
+  void yypop_buffer_state();
+
+  virtual int yylex(YYSTYPE* yylval, yy::location* yylloc);
+  virtual void switch_streams( FLEX_STD istream* new_in, FLEX_STD ostream* new_out = 0 );
+
+protected:
+  virtual int LexerInput( char* buf, int max_size );
+  virtual void LexerOutput( const char* buf, int size );
+  virtual void LexerError( const char* msg );
+
+  void yyunput( int c, char* buf_ptr );
+  int yyinput();
+  int yywrap();
+
+  void yy_load_buffer_state();
+  void yy_init_buffer( struct yy_buffer_state* b, FLEX_STD istream* s );
+  void yy_flush_buffer( struct yy_buffer_state* b );
+
+  int yy_start_stack_ptr;
+  int yy_start_stack_depth;
+  int* yy_start_stack;
+
+  void yy_push_state( int new_state );
+  void yy_pop_state();
+  int yy_top_state();
+
+  yy_state_type yy_get_previous_state();
+  yy_state_type yy_try_NUL_trans( yy_state_type current_state );
+  int yy_get_next_buffer();
+
+  FLEX_STD istream* yyin; // input source for default LexerInput
+  FLEX_STD ostream* yyout;  // output sink for default LexerOutput
+
+  // yy_hold_char holds the character lost when yytext is formed.
+  char yy_hold_char;
+
+  // Number of characters read into yy_ch_buf.
+  int yy_n_chars;
+
+  // Points to current character in buffer.
+  char* yy_c_buf_p;
+
+  int yy_init;    // whether we need to initialize
+  int yy_start;   // start state number
+
+  // Flag which is used to allow yywrap()'s to do buffer switches
+  // instead of setting up a fresh yyin.  A bit of a hack ...
+  int yy_did_buffer_switch_on_eof;
+
+
+  size_t yy_buffer_stack_top; /**< index of top of stack. */
+  size_t yy_buffer_stack_max; /**< capacity of stack. */
+  struct yy_buffer_state ** yy_buffer_stack; /**< Stack as an array. */
+  void yyensure_buffer_stack(void);
+
+  // The following are not always needed, but may be depending
+  // on use of certain flex features (like REJECT or yymore()).
+
+  yy_state_type yy_last_accepting_state;
+  char* yy_last_accepting_cpos;
+
+  yy_state_type* yy_state_buf;
+  yy_state_type* yy_state_ptr;
+
+  char* yy_full_match;
+  int* yy_full_state;
+  int yy_full_lp;
+
+  int yy_lp;
+  int yy_looking_for_trail_begin;
+
+  int yy_more_flag;
+  int yy_more_len;
+  int yy_more_offset;
+  int yy_prev_more_offset;
+};
+
+}
+
+#endif // yyFlexLexer || ! yyFlexLexerOnce
+
+#endif // FLEXLEXER_H