g with release 1.46.</p>
      <p align="left"><b>Define macro BOOST_FILESYSTEM_VERSION as 3 to use 
      Version 3. This will be the default for release 1.46 and later.</b></p>
      <p align="left"><b>Define macro BOOST_FILESYSTEM_VERSION as 2 to use 
      Version 2. This is the default for release 1.44 and 1.45.</b></p>
      <p align="left"><b>You may define the BOOST_FILESYSTEM_VERSION macro:</b></p>
      <ul>
        <li>
      <p align="left"><b>On the build command line; the exact format depends 