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From: Richard Stallman <rms@gnu.org>
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Subject: Re: dangerous alloca calls
Date: Sat, 22 Nov 2003 16:18:38 -0500
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    It seems that it is better that we use a macro something
    like this consitently.  What do you think?

    #define SAFE_ALLOCA(address, size, unwind_function)		\

I think it is a good idea.