Aegisub/meson_options.txt

option('enable_alsa', type: 'feature', description: 'ALSA audio output')
option('enable_openal', type: 'feature', description: 'OpenAL audio output')
option('enable_libpulse', type: 'feature', description: 'PulseAudio audio output')
option('enable_portaudio', type: 'feature', description: 'PortAudio audio output')
option('default_audio_output', type: 'combo', choices: ['auto', 'ALSA', 'OpenAL', 'PulseAudio', 'PortAudio'], description: 'Default audio output')

option('enable_ffms2', type: 'feature', description: 'FFMS2 video source')

option('enable_fftw3', type: 'feature', description: 'FFTW3 support')
option('enable_hunspell', type: 'feature', description: 'Hunspell spell checker')
option('enable_uchardet', type: 'feature', description: 'uchardet character encoding detection')

option('system_luajit', type: 'boolean', value: false, description: 'Force using system luajit')

option('build_credit', type: 'string', value: '', description: 'Build credit shown in program title')

option('enable_update_checker', type: 'boolean', value: false, description: 'Enable the update checker')
option('update_server', type: 'string', value: 'updates.aegisub.org', description: 'Server to use for the update checker')
option('update_url', type: 'string', value: '/trunk', description: 'Base path to use for the update checker')