Date: Fri, 5 Sep 2003 11:40:53 +0200 From: Alexander Leidinger <Alexander@Leidinger.net> To: Terry Lambert <tlambert2@mindspring.com> Cc: current@freebsd.org Subject: Re: Question about genassym, locore.s and 0-sizedarrays(showstopper for an icc compiled kernel) Message-ID: <20030905114053.7bb91783.Alexander@Leidinger.net> In-Reply-To: <3F585230.6868CB64@mindspring.com> References: <20030904180448.021a1b6b.Alexander@Leidinger.net> <20030904162858.GI98381@dan.emsphone.com> <20030905001411.3a9030b3.Alexander@Leidinger.net> <20030904225123.GB39916@dan.emsphone.com> <3F584B85.AAC3A11D@mindspring.com> <20030905105507.51ba3183.Alexander@Leidinger.net> <3F585230.6868CB64@mindspring.com>
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On Fri, 05 Sep 2003 02:06:56 -0700
Terry Lambert <tlambert2@mindspring.com> wrote:
> Now try:
>
> struct foo {
> char c;
> int i;
> long array[];
> };
>
> struct foo foo;m
> struct foo fee[1];
> struct foo fie[3];
> struct foo foe[0];
> struct foo fum[1];
>
> on both compilers. If they end up the same, then Intel needs to
> change to using the 0. If they end up different, then they are
> broken relative to the C99 standard and zero length arrays a final
> elements in structures.
% icc -c terry.c
terry.c(8): warning #1229: type containing an unknown-size array may alias another element
struct foo fee[1];
^
terry.c(9): warning #1229: type containing an unknown-size array may alias another element
struct foo fie[3];
^
terry.c(10): warning #1229: type containing an unknown-size array may alias another element
struct foo foe[0];
^
terry.c(11): warning #1229: type containing an unknown-size array may alias another element
struct foo fum[1];
^
icc:
00000008 C fee
00000018 C fie
00000008 C foe
00000008 C foo
00000008 C fum
gcc:
00000008 C fee
00000018 C fie
00000000 C foe
00000008 C foo
00000008 C fum
Bye,
Alexander.
--
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