vector of aligned elements

["massimiliano cialdi" <cialdi@xxxxxxxxx>]

is possoble to declare an array of element aligned?

for example is possible to declare an array of long aligned to 8 byte,
so as if &array[0] is x then &array[1] is x+MAX(8,sizeof(long))

I tried the following

#include <stdio.h>

typedef long aligned_long __attribute__ ((aligned (32)));

aligned_long a[4];

int main(void)
{
	printf("test %d\n", sizeof(a));
	return 0;
}

compiled with the following command line
gcc -Wall main.c -o main
(gcc 4.2.1)

I obtain this error
error: alignment of array elements is greater than element size


So is it impossible or is there another way?

this is not the real problem, I simply try to answer to the following question:
can I assume that (&array[1]-&array[0])==sizeof(array[0])?

thanks
-- 
Et nunc, auxilium solis, vincam!
Oppugnatio solaris!
VIS!

Massimiliano Cialdi
cialdi@xxxxxxxxx
massimiliano.cialdi@xxxxxxxxxxxx