        The BFILE extension it is not available in your library by
            default. Instead, you must enable the extension when you
            compile Berkeley DB. See the <em class="citetitle">Berkeley DB Installation and Build Guide</em>
            for information on how to enable this extension when you build
            Berkeley DB. Once you have enabled the extension, applications will
            also need to load the BFILE library file:
            <code class="literal">libbfile_ext.so</code>.
