On 26/08/14 13:43, Jeff King wrote: > On Tue, Aug 26, 2014 at 01:37:44PM +0100, Ramsay Jones wrote: > >>> On my 64-bit system using gcc, sizeof() returns 16; it has to pad the >>> whole thing to 64-bit alignment in case I put two of them in an array. >>> But offsetof(name) is 12, since the array of char does not need the same >>> alignment; it can go right after the type and make use of the padding >>> bits. >> >> Hmm, interesting. I must re-read the standard. I was convinced that the >> standard *requires* any alignment padding to come *before* the name field. >> (how would you put a, non-trivial, variable data structure into an array?) > > I think you don't. How would you compute a[1] if a[0] has a variable > size? > > You can put a flex-array structure into an array, but then each element > has the flex member as zero-size (and you should not access it, of > course). Exactly. ;-) ATB, Ramsay Jones -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html