C++ Compile error on Github project
<p>I am trying to compile the code from the below github location and getting an error any help much appreciated</p>

<p>Github project is <a href="https://github.com/aranetic/process-pst" rel="nofollow">https://github.com/aranetic/process-pst</a></p>

<p>Error is</p>

<pre><code>~/process-pst (master ✘)✭  ᐅ make
[  7%] Building CXX object CMakeFiles/ProcessPstLib.dir/edrm.cpp.o
/Users/gwest/process-pst/edrm.cpp: In function 'void&lt;unnamed&gt;::output_file(edrm_context&amp;,        const std::wstring&amp;, const std::wstring&amp;, const std::vector&lt;unsigned char,    std::allocator&lt;unsigned char&gt; &gt;&amp;)':
/Users/gwest/process-pst/edrm.cpp:177: error: 'class boost::filesystem::path' has no     member named 'file_string'
make[2]: *** [CMakeFiles/ProcessPstLib.dir/edrm.cpp.o] Error 1
make[1]: *** [CMakeFiles/ProcessPstLib.dir/all] Error 2
make: *** [all] Error 2
</code></pre>

<p>Thanks</p>
