namespace-invasive CPP built-ins

[Richard Kenner]

    > SUBTARGET_LANGUAGE_CPP_BUILTINS perhaps?
    > 
    > I guess the question now is: "Which OSs want it?"  :-)  I know that
    > NetBSD does *not*, and that OSF/1 *does* (and IRIX, for MIPS), but
    > I don't know about Linux or the others...

    I think Kenner is the man to ask (I think it was he who explained
    the reason for said macros)...

Not that I can recall, though it's certainly possible.