> looks like without local varables the BP/SP reg's are not saved and
 > restored when optimizations are turned on.

I'd consider that a bug in QC's alloca() implementation. AFAIK, MSC had no
problems in any versions I used (2, 4, 5, 5.1, 6, 7).

FWIW, since I write code for a number of environments, I tend to avoid it
also. Mainly because one of those environments doesn't implement it. I even
tried the gnu implementation (no gnu compiler there though with it's slick
built-in alloca :-(), but no go either - crashed and burned. Unfortunately,
I don't yet know enough about the Motorola 68k CPU family well enough to
debug it with any reasonable expectation of success, but I'm sure it can be
done...

Regards,
David

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