--- Comment #8 from bliss1940-bbs at yahoo dot com 2007-05-22 01:16 ---
(In reply to comment #7)
> On arm-elf structures are padded/aligned to a 4-byte boundary. This is a
> "feature" of the ABI. The microsoft compiler obviously conforms to a different
> ABI, which is why you get differe
--- Comment #7 from pbrook at gcc dot gnu dot org 2007-05-21 23:55 ---
On arm-elf structures are padded/aligned to a 4-byte boundary. This is a
"feature" of the ABI. The microsoft compiler obviously conforms to a different
ABI, which is why you get different results. Both are "correct".
--- Comment #6 from pinskia at gcc dot gnu dot org 2007-05-21 23:53 ---
(In reply to comment #5)
> (In reply to comment #3)
>
> > Try:
> > struct a33
> > {
> > struct Char1 a1;
> > struct Char1 a2;
> > };
> > And see what size/offset the structs are at. Again this is an ABI issue
>
--- Comment #5 from bliss1940-bbs at yahoo dot com 2007-05-21 23:48 ---
(In reply to comment #3)
> Try:
> struct a33
> {
> struct Char1 a1;
> struct Char1 a2;
> };
> And see what size/offset the structs are at. Again this is an ABI issue
Simply saying it's an ABI issue doesn't mak
--- Comment #4 from bliss1940-bbs at yahoo dot com 2007-05-21 23:22 ---
(In reply to comment #3)
I'm using arm-elf. Thanks for the __attribute__((packed)). That does indeed
remove the hole at the end.
I think we should agree to disagree. You say it's an ABI issue but that seems
impo
--- Comment #3 from pinskia at gcc dot gnu dot org 2007-05-21 22:24 ---
(In reply to comment #2)
> To beat a dead horse again, the data members are suitably aligned in
> Microsoft's struct. For the GNU folk to say the extra padding is for data
> alignment or is an ABI issue is misleadin
--- Comment #2 from bliss1940-bbs at yahoo dot com 2007-05-21 22:18 ---
(In reply to comment #1)
I don't think I said GCC was in error, but just different.
Maybe we can come to an agreement here, or maybe not. Let's see.
I certainly would expect the ARM7 would prefer that 4 byte oper
--- Comment #1 from pinskia at gcc dot gnu dot org 2007-05-21 02:39 ---
> Just to make myself clear, this isn't a data alignment thing.
Actually it is a data alignment issue, the ABI for arm most likely says objects
larger than a certain size are aligned to 32bits. I think you need to
