  <p> To build with <a href="../../../tools/build/index.html" target="_top">Boost.Build</a>,
      run <i>b2</i> from the directory <code>libs/iostreams/build</code>, or
      from the Boost root directory. </p>
    <p>If you want to use the compression filters when building iostreams, you
      have two choices. You can setup the zlib, bzip2, zstd and/or LZMA toolsets in Boost
      Build in a jamfile, preferably user-config.jam, as documented in <a target="_top"
        href="../../../tools/build/doc/html