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Re: Structure alignment problem

From: Richard Earnshaw <rearnsha at arm dot com>
To: Nicolas Moreau <nicolas at enttec dot com>
Cc: Richard dot Earnshaw at arm dot com, Richard Earnshaw <rearnsha at arm dot com>, crossgcc at sources dot redhat dot com
Date: Mon, 04 Nov 2002 12:41:10 +0000
Subject: Re: Structure alignment problem
Organization: ARM Ltd.
Reply-to: Richard dot Earnshaw at arm dot com

> 
> > Because you need to pack the structure as a whole, not just the members of 
> > it.
>  
> > Try
> > 
> > typedef struct {
> >     unsigned char Var1;
> > } mystruct __attribute__((packed));
> > 
> > R.
> 
> Tried that does not work !!

Ah, yes; that's because of a long-standing bug in gcc.  Separate the 
typedef from the structure declartion and it should all be fine.  Ie

struct mystruct {
    unsigned char Var1;
}  __attribute__((packed));

typedef struct mystruct mystruct;

Life is such fun...

R.


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Follow-Ups:
- Re: Structure alignment problem
  - From: Fabio Giovagnini
- Re: Structure alignment problem
  - From: Grant Edwards

References:
- Re: Structure alignment problem
  - From: Nicolas Moreau

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