> However, this also means
> that gcc doesn't predefine a symbol for the local machine type (hp300,
> sun3, amiga, mac68k, da30) any more.  Also, some ports may wish to
> define additional symbols, such as hp9000 for the hp300 port.

I do not see why you want this. I think that adding an "amiga"
define at the userlevel is actually a bad idea. As is adding an
"da30" define.

I think it is good that these port-specific symbols aren't exported
to userland. Please don't pull this nasty trick. Instead, aim for
binary compatibility in the m68k land.

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