From: Andrew Morton <akpm@linux-foundation.org>
To: Amerigo Wang <amwang@redhat.com>
Cc: linux-kernel@vger.kernel.org, Sam Ravnborg <sam@ravnborg.org>
Subject: Re: [Patch] kbuild: fix a compile warning
Date: Thu, 28 May 2009 00:41:00 -0700 [thread overview]
Message-ID: <20090528004100.3716e00d.akpm@linux-foundation.org> (raw)
In-Reply-To: <20090515075229.11346.6710.sendpatchset@localhost.localdomain>
On Fri, 15 May 2009 03:51:18 -0400 Amerigo Wang <amwang@redhat.com> wrote:
>
> I got this warning:
With which gcc version?
> HOSTCC scripts/basic/fixdep
> scripts/basic/fixdep.c: In function 'traps':
> scripts/basic/fixdep.c:377: warning: dereferencing type-punned pointer will break strict-aliasing rules
> scripts/basic/fixdep.c:379: warning: dereferencing type-punned pointer will break strict-aliasing rules
>
(wtf?)
>
> --- a/scripts/basic/fixdep.c
> +++ b/scripts/basic/fixdep.c
> @@ -373,10 +373,11 @@ void print_deps(void)
> void traps(void)
> {
> static char test[] __attribute__((aligned(sizeof(int)))) = "CONF";
> + int *p = (int *)test;
>
> - if (*(int *)test != INT_CONF) {
> + if (*p != INT_CONF) {
> fprintf(stderr, "fixdep: sizeof(int) != 4 or wrong endianess? %#x\n",
> - *(int *)test);
> + *p);
> exit(2);
> }
> }
next prev parent reply other threads:[~2009-05-28 7:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-15 7:51 [Patch] kbuild: fix a compile warning Amerigo Wang
2009-05-28 7:41 ` Andrew Morton [this message]
2009-05-31 2:25 ` Amerigo Wang
2009-09-13 14:05 ` Felipe Contreras
2009-09-15 8:04 ` Amerigo Wang
2009-09-15 8:33 ` Felipe Contreras
2009-05-28 13:18 ` Luming Yu
2009-06-05 22:08 ` Sam Ravnborg
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