title: CGAL error LNK2019: unresolved external symbol
body: <p>I am building CGAL 4.6 32 bit with Boost 1.58.0 32bit ... the generation is done without error using cmake gui 3.2.2</p>
  
  <p>But when I am trying to build it with visual studio 2013 I am getting the following error:</p>
  
  <pre><code>all_files.obj : error LNK2019: unresolved external symbol "class boost::system::error_category const &amp; __cdecl boost::system::system_category(void)" (?system_category@system@boost@@YAAEBVerror_category@12@XZ) referenced in function "void __cdecl boost::system::`dynamic initializer for 'native_ecat''(void)" (??__Enative_ecat@system@boost@@YAXXZ)
  
  &gt;all_files.obj : error LNK2019: unresolved external symbol "class boost::system::error_category const &amp; __cdecl boost::system::generic_category(void)" (?generic_category@system@boost@@YAAEBVerror_category@12@XZ) referenced in function "void __cdecl boost::system::`dynamic initializer for 'errno_ecat''(void)" (??__Eerrno_ecat@system@boost@@YAXXZ)
  
  &gt;all_files.obj : error LNK2019: unresolved external symbol "void __cdecl boost::detail::set_tss_data(void const *,class boost::shared_ptr&lt;struct boost::detail::tss_cleanup_function&gt;,void *,bool)" (?set_tss_data@detail@boost@@YAXPEBXV?$shared_ptr@Utss_cleanup_function@detail@boost@@@2@PEAX_N@Z) referenced in function "public: __cdecl boost::thread_specific_ptr&lt;int&gt;::~thread_specific_ptr&lt;int&gt;(void)" (??1?$thread_specific_ptr@H@boost@@QEAA@XZ)
  
  &gt;C:\Program Files\CGAL-4.6\bin\Release\CGAL-vc120-mt-4.6.dll : fatal error LNK1120: 3 unresolved externals
  </code></pre>
  
  <p>Can anyone help? [btw its trying to build the solution for <code>x64</code> and if I change it to <code>wix32</code> its skipping the build.]</p>