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Re: unable to detect exception model

From: Eric Botcazou <ebotcazou at libertysurf dot fr>
To: Richard Guenther <richard dot guenther at gmail dot com>
Cc: gcc at gcc dot gnu dot org, Richard Guenther <rguenther at suse dot de>, Andrew Pinski <pinskia at physics dot uc dot edu>, Jack Howarth <howarth at bromo dot msbb dot uc dot edu>
Date: Sun, 25 Jun 2006 23:29:55 +0200
Subject: Re: unable to detect exception model
References: <20060624024246.4D61B11003F@bromo.msbb.uc.edu> <200606252230.01425.ebotcazou@libertysurf.fr> <Pine.LNX.4.64.0606252258010.5056@nyjnma.fhfr.qr>

> So, something obviously wrong with
>
> struct max_alignment {
>  char c;
>  union {
>    HOST_WIDEST_INT i;
>    long double d;
>  } u;
> };
>
> /* The biggest alignment required.  */
>
> #define MAX_ALIGNMENT (offsetof (struct max_alignment, u))
>
> for SPARC 32bit?

I don't think so, the ABI says 8 in both cases.

Note that bootstrap doesn't fail on SPARC/Solaris 2.[56] and (presumably) 
SPARC/Linux, which have HOST_WIDE_INT == 32, whereas SPARC/Solaris 7+ have 
HOST_WIDE_INT == 64.  All are 32-bit compilers.

Bootstrap doesn't fail on SPARC64/Solaris 7+ either, for which the ABI says 16 
for the alignment in both cases.  They are 64-bit compilers.

-- 
Eric Botcazou

Follow-Ups:
- Re: unable to detect exception model
  - From: Seongbae Park

References:
- unable to detect exception model
  - From: Jack Howarth
- Re: unable to detect exception model
  - From: Eric Botcazou
- Re: unable to detect exception model
  - From: Richard Guenther

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