title: Unload library failed on linux with poco
body: <p>I'm using poco for loading and unloading libraries. Everything is working fine on windws, but on Linux it is failing on <code>poco::ClassLoader::unloadLibrary(libraryName)</code> function call. It just gets in this function and it never comes out and it does not throw exception. I have one more <code>.so</code> library and it is working just fine. </p>
  
  <p>I know you cannot tell me exact reason why is it failling, but it could help me if I knew what are possible reasons for this, and maybe is there some tool that could help me to figure it out?
  Thanks</p>