option('alsamidi', type: 'feature', value: 'auto',
    description: 'MIDI out pluggable using ALSA (Linux-only)'
)
option('glrenderer', type: 'feature', value: 'auto',
    description: 'renderer that uses OpenGL'
)
option('laserdisc', type: 'feature', value: 'auto',
    description: 'emulation of Laserdisc players'
)