AVR-Chat

--- In AVR-Chat@yahoogroups.com, Russell Shaw <rjshaw@...> wrote:
>
> john wrote:
> > I'm trying to declare a structure but I keep getting an error 
like this
> > or similar depending on were I try to put __attribute__.
> > 
> > error: expected '=', ',', ';', 'asm' or '__attribute__' 
before 'struct'
> > 
> > Does avr-gcc allow plain-old structures? How should I write this 
to get 
> > it to compile?
> > 
> > struct __attribute__ ((__packed__)) rb_fifo_struct_type 
> > {
> >     uint8_t *head;
> >     uint8_t *tail;
> >     uint8_t *dptr;
> > };
> > typedef struct rb_fifo_struct_type rbuff_t;
> 
> Try: __attribute__ ((packed));
> 
> I think you should be doing:
> 
> struct rb_fifo_struct_type
> {
>      uint8_t *head __attribute__ ((packed));
>      uint8_t *tail __attribute__ ((packed));
>      uint8_t *dptr __attribute__ ((packed));
> };
> typedef struct rb_fifo_struct_type rbuff_t;
>

I get the same error with the __attribute__ assigned to the member 
vairables.

For some reason if I put a semi colon in front of the structure the 
error goes away.

;    //<------------
struct rb_fifo_struct_type
{
    uint8_t *head;
    uint8_t *tail;
    uint8_t *dptr;
};
typedef struct rb_fifo_struct_type rbuff_t;