title: Add LDFLAGS in qt .pro field
body: <p>How to add LDFLAGS in qt .pro field?</p>
  
  <p>consider Library folder and shared library(.so) is in a dir_path folder.</p>
  
  <p>For example, adding this line is not solving the issue
  <strong>LIBS+= -Ldir_path -llibrary_name</strong></p>
  
  <p>Any suggestions?</p>