option('git_werror', type: 'feature', value: 'auto', description: 'use -Werror if building from GIT') option('libvirt', type: 'feature', value: 'auto', description: 'libvirt support') option('vnc', type: 'feature', value: 'auto', description: 'VNC support') option('spice', type: 'feature', value: 'auto', description: 'SPICE support') option('ovirt', type: 'feature', value: 'auto', description: 'oVirt support') option('vte', type: 'feature', value: 'auto', description: 'VTE support') option('build-id', type: 'string', value: '', description: 'Extra build ID string') option('os-id', type: 'string', value: '', description: 'Remote viewer OS-ID string') option('bash_completion', type: 'feature', value: 'auto', description: 'bash-completion support') option('bash_completion_dir', type: 'string', value: '', description: 'directory containing bash completion scripts')