option('tests', type: 'feature', value: 'auto', description: 'Build tests (requires umockdev)') option('introspection', type: 'feature', value: 'auto', description: 'Generate introspection data (requires gobject-introspection)') option('vapi', type: 'feature', value: 'auto', description: 'Generate vapi file (requires vapigen)') option('gtk_doc', type: 'boolean', value: false, description: 'Build reference manual (requires gtk-doc)')