title: Linker error LNK2001 unresolved external std::_String_base::_Xlen
body: <blockquote>
    <p>1>ClCompile: 1>  All outputs are up-to-date.
    1>libsphinx.lib(sphinx.obj) : error LNK2001: unresolved external
    symbol "public: static void __cdecl std::_String_base::_Xlen(void)"
    (?_Xlen@_String_base@std@@SAXXZ) 1>libsphinx.lib(sphinx.obj) : error
    LNK2001: unresolved external symbol "public: static void __cdecl
    std::_String_base::_Xran(void)" (?_Xran@_String_base@std@@SAXXZ)
    1>C:\Users\shirokov_m\Documents\sphquery\Release\sphquery.exe : fatal
    error LNK1120: 2 unresolved externals 1> 1>Build FAILED. 1> 1>Time
    Elapsed 00:00:00.25
    ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========</p>
  </blockquote>
  
  <p>I hadn't any problems with libsphinx.lib compilation. Then I created a new project ( sphquery ) and linked the library to it. Now I have LNK2001 error.</p>