option('benchmarks', type: 'feature', value: 'auto', yield: true,
       description: 'Build benchmarks')

option('checks', type: 'boolean', value: true, yield: true,
       description: 'Check for features with the build system')

option('posix', type: 'feature', value: 'auto', yield: true,
       description: 'Use POSIX system facilities')

option('strict', type: 'boolean', value: false, yield: true,
       description: 'Enable ultra-strict warnings')

option('tests', type: 'feature', value: 'auto', yield: true,
       description: 'Build tests')

option('title', type: 'string', value: 'Zix',
       description: 'Project title')