code: def add_versioned_targets_to_INSTALLED_FILES(target, source, env):
      
      global _INSTALLED_FILES, _UNIQUE_INSTALLED_FILES
      Verbose = False
      _INSTALLED_FILES.extend(target)
      if Verbose:
          print("add_versioned_targets_to_INSTALLED_FILES: target={:r}".format(list(map(str, target))))
      symlinks = listShlibLinksToInstall(target[0], source, env)
      if symlinks:
          SCons.Tool.EmitLibSymlinks(env, symlinks, target[0])
      _UNIQUE_INSTALLED_FILES = None
      return (target, source)
docs: An emitter that adds all target files to the list stored in the
      _INSTALLED_FILES global variable. This way all installed files of one
      scons call will be collected.