option('gtk', type: 'feature', value: 'auto', description: 'enable gtk+-3.0 support') option('gnome', type: 'feature', value: 'enabled', description: 'enable GNOME support') option('goa', type: 'feature', value: 'enabled', description: 'enable Gnome Online Accounts (goa) support') option('always_build_tests', type: 'boolean', value: true, description: 'Enable always building tests') option('installed_tests', type: 'boolean', value: false, description: 'Install test programs') option('man', type: 'boolean', value: false, description: 'generate man pages') option('gtk_doc', type: 'boolean', value: false, description: 'use gtk-doc to build documentation') option('introspection', type: 'boolean', value: true, description: 'Enable creation of GObject Introspection files') option('vapi', type: 'boolean', value: true, description: 'Enable creation of vapi files')