View source for Talk:UnixCompile

Could anyone clarify this scentence in the current version a little:
  '''Be careful!''' Some of the libraries are better not to be installed (at all, beware of old installations) and should be linked to directly. These are mostly ffmpeg and liveMedia.
What does that mean? You shall fetch the source code and compile it (make) but not install (make install) it, but leave it in the source tree?