Re: [avr-gcc-list] structure packing

[J.C. Wren]

I find it MUCH better to manage it on a structure by structure basis.

typedef struct myDataStruct_s
{
        char c;
        int i;
        long l;
        float f;
}
__attribute__ ((packed)) myDataStruct_t;

myDataStruct_t someData;

--John


On Wednesday 04 June 2003 16:36 pm, address@hidden wrote:
> > hi,
> > i have a limited size in memory and i dont want compiler
>
> to align my
>
> > structure to 8 byte boundaries.I wonder if it is possible
>
> with gcc. I
>
> > remember using pragma commands in visual C++ to avoid
>
> packing. What
>
> > would be the command for disallowing compiler to pack the
>
> structure.
>
> > thanks.
>
> See the GCC docs:
> <http://gcc.gnu.org/onlinedocs/gcc-3.3/gcc/Code-Gen-
> Options.html#Code%20Gen%20Options>
>
> Look for -fpack-struct. This option is used in the WinAVR
> sample makefile. To not pack structures, remove this
> option, or alternatively use -fno-pack-struct.
>
> Don't forget to consult the manual first.
>
> Eric
>
>
>
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