+
+ /* Sums of previous lengths, properly aligned. There's no need to
+ align gsum, since struct group is aligned at least as strictly as
+ void * (since it contains a void * member). And there's no need
+ to align lsum, since struct option is aligned at least as
+ strictly as char. */
+ gsum = glen;
+ csum = alignto (gsum + clen, alignof (struct option));
+ lsum = csum + llen;