title: Include .so library into another in Qt
body: <p>I try to include one dynamic library(.so) into another. Than I include first library into app. <code>TDS-Converter/Converter</code> it's directory with source code. With this config I get error when try to call any function of second library via <code>undefined reference to</code>.</p>
  
  <pre><code>QT -= gui
  TEMPLATE = lib
  
  unix {
      DEPENDPATH += . ../../TDS-Converter/Converter
      INCLUDEPATH +=  ../../TDS-Converter/Converter
      LIBS += ../../TDS-Converter/Converter/Converter -lConverter
  }
  win32 {
  }
  
  SOURCES += main.cpp\
     ...
  
  HEADERS += \ 
      ...
  </code></pre>
  
  <p>How to fix this ?</p>