Fix ids and rpaths for some OS X dylibs

setup-osx-partial.py

# If on OS, we need to fix some issues with the dylibs
# namely the rpath stuff & dylib IDs,  it's a bit of a pain
if is_osx:
    cmds = []

    # First fix Ids
    dylibs = ['ogg', 'vorbis', 'vorbisenc', 'vorbisfile', 'sndfile']
    for lib in dylibs:
        lib_filename = 'lib%s.dylib' % (lib)
        cmd = 'install_name_tool -id "@rpath/{0}" lib/{0}'.format(lib_filename)
        cmds.append(cmd)

    # Now fix the references
    changes = [
        # (old, new, [targets])
        ('ogg.0', 'ogg',                   ['FLAC', 'sndfile', 'vorbis', 'vorbisenc', 'vorbisfile']),
        ('vorbis.0.4.8', 'vorbis',         ['sndfile', 'vorbisenc', 'vorbisfile']),
        ('vorbisfile.3.3.7', 'vorbisfile', ['sndfile']),
        ('vorbisenc.2.0.11', 'vorbisenc',  ['sndfile']),
    ]
    for (o, n, targets) in changes:
        for t in targets:
            change_cmd = 'install_name_tool -change "@rpath/lib{0}.dylib" "@rpath/lib{1}.dylib" lib/lib{2}.dylib'.format(o, 
n, t)
            cmds.append(change_cmd)

    # Run the commands
    [os.system(x) for x in cmds]