cannam@86: libvorbis has libogg as a dependency, you need to have libogg
cannam@86: compiled beforehand.
cannam@86: 
cannam@86: Lets say you have libogg and libvorbis in the same directory:
cannam@86: 
cannam@86: libogg-1.1.3 
cannam@86: libvorbis-1.2.0
cannam@86: 
cannam@86: Because there is no automatic library detection you have to,
cannam@86: either:
cannam@86: 
cannam@86: 1. Rename libogg-1.1.3 to libogg
cannam@86: 
cannam@86: 2. Open libogg.props with a text editor (even notepad.exe
cannam@86: will suffice) and see if LIBOGG_VERSION is set to the correct
cannam@86: version, in this case "1.1.3"