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From: "Frank J. Lhota" <NOSPAM.lhota.adarose@verizon.net>
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Subject: Re: GNAT parameter passing, C-style?
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Date: Wed, 31 Dec 2003 19:05:21 GMT
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Date: 2003-12-31T19:05:21+00:00
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"Hyman Rosen" <hyrosen@mail.com> wrote in message
news:1072891494.595791@master.nyc.kbcfp.com...
> Frank J. Lhota wrote:
> > I go back to my original question: does anyone know of a C compiler
which,
> > when compiling C (not C++) does not default to the C calling convention
> > (i.e. arguments pushed on the stack in reverse order, and popped off by
> > calling function) in the absence of any indication of another
convention?
>
> Certainly. Here's partial output of such code compiled on a Sun
> with the simple invocation 'cc -S g.c'. As you can see, arguments
> are passed in registers and processed left-to-right.

Thanks for the example. This is a case where I'm glad to be proved wrong,
for it always seemed wasteful to force the C calling convention when it is
not necessary.

Does the Sun compiler have a command line option for compiling vanilla C
programs? This would an ideal solution to handling both legacy and ANSI C
code.