> There is only one real compiler implementation what kind of meaning of 'real' reduces the several compiler implementations to just one? Example: I use two n

> There is only one real compiler implementation what kind of meaning of 'real' reduces the several compiler implementations to just one? Example: I use two native code compilers (SBCL and LispWorks) on my Mac. Both are available on other platforms, too. Is one of those not 'real'? What about, say, ECL or Allegro CL? Are they unreal?