The Unix version of ld68 used not to support "-R"; only the V version of ld68
    did.  There is a hack in cc68.c so that it only uses -R if it's running on
    V (and hence expects to invoke the V version of ld68).  I've fixed (I 
    think) the Unix version of ld68 to cope with -R, but haven't taken the 
    hack out of cc68.c - for no particularly good reason.
