option('debug-logging', type : 'boolean', value : false,
  description : 'Enable debug logging in all modules')
option('log-stdout', type : 'boolean', value : false,
  description : 'Redirect logging to stdout')
option('log-file', type : 'string', value : '',
  description : 'Write logging output into this file')
option('crypto-library', type: 'combo', choices : ['none', 'openssl', 'nss', 'mbedtls'], value : 'none',
  description : 'What external crypto library to leverage, if any (OpenSSL, NSS, or mbedtls)')
option('crypto-library-kdf', type : 'feature', value : 'auto',
  description : 'Use the external crypto library for Key Derivation Function support')
option('fuzzer', type : 'feature', value : 'disabled',
  description : 'Build libsrtp2 fuzzer (requires build with clang)')
option('tests', type : 'feature', value : 'auto', yield : true,
  description : 'Build test applications')
option('pcap-tests', type : 'feature', value : 'auto',
  description : 'Build test application that require libpcap')
option('doc', type : 'feature', value : 'auto', yield : true,
  description : 'Generate API documentation with doxygen')