text: // Not that we'd need *that* code, but if neither ECC nro PSK is defined,
  // there's empty unions and such (and newer verisons of the library complain
  // more explicitly)
  #define DTLS_PSK
  
  // Similarly, without a SHA algorithm, there's unused variables and such
  #define WITH_SHA256
  
  // Without, we get a #warning that is escalated to an #error by -Werror
  #define HAVE_ASSERT_H
  