#define __aligned(N)    __attribute__((aligned(N)))
#define alignof(X)      __alignof__(X)

struct s {
        short a, b, c;
} __aligned(2*sizeof(short));

static int fs(void) { return  sizeof(struct s); }
static int fa(void) { return alignof(struct s); }

void main(void)
{
        _Static_assert( sizeof(struct s) == 4 * sizeof(short), "size");
        _Static_assert(alignof(struct s) == 2 * sizeof(short), "alignment");
}

/*
 * check-name: type-attribute-align
 */