macro rtcNoInit(lh, rh, ex: untyped) =
  if lh.kind != nnkIdent:
    error("Expected a identifier: " & $lh.kind, lh)
  if rh.kind != nnkIdent:
    error("Expected an identifier: " & $rh.kind, rh)
  if ex.kind != nnkEmpty:
    error("You should not immediately initialise an RTC_NOINIT_ATTR variable",
ex)
  result =
    genast(lh, rh):
      var lh {.codegendecl: "RTC_NOINIT_ATTR $# $#".}: rh