option('repl', type: 'feature', value: 'auto', description: 'Enable the REPL (command line tool)' ) option('linenoise', type: 'feature', value: 'auto', description: 'Use linenoise for the REPL' ) option('tests', type: 'boolean', value: 'true', description: 'Whether to build tests' ) option('tests_cross', type: 'boolean', value: 'false', description: 'Whether to build tests when cross-compiling' )