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From: Cesar Rabak <crabak AT acm DOT org>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: bnu214s compiled for djgpp 2.04 alpha
Date: Wed, 22 Sep 2004 12:48:54 -0300
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Message-ID: <41519EE6.208@acm.org>
References: <1095849299 DOT 415155532ce78 AT webmail DOT wilkes DOT edu> <41518C5C DOT 1000306 AT acm DOT org> <2rdhq3F191i81U1 AT uni-berlin DOT de>
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Hans-Bernhard Broeker escreveu:
> Cesar Rabak <crabak AT acm DOT org> wrote:
> 
>>fdonahoe AT wilkes DOT edu escreveu:
> 
> [...]
> 
>>># 628 "./gmp-impl.h"
>>>void __gmpz_aorsmul_1 (mp_size_t sub,mpz_ptr w,mpz_srcptr u,mp_limb_t
>>>v) __attribute__ ((regparm (1)));
>>
> [...]
> 
>>># 60 "mpz/aorsmul_i.c"
>>>void
>>>__gmpz_aorsmul_1 (mp_size_t sub,mpz_ptr w,mpz_srcptr x,mp_limb_t y)
>>>{
>>
> 
>>They don't look to have any clash between declaration and definition for 
>>me. 
> 
> 
> Absence vs. presence of __attribute__((regparm(1)) should not be a
> clash?  I would rather strongly expect it to count as one --- if the
> __attribute___ is useful at all, it's a change of ABI, which makes the
> prototype incompatible with the definition.

If it changes the ABI, for sure.

> 
> BTW: what exaxctly made the GMP people believe they can violate the
> ANSI/ISO standard C reserved-for-implementation namespace like that?
> This actually means that strictly speaking, the above causes undefined
> behaviour, and everything goes.
> 
Probably the forgiveness of earlier versions of gcc?