From: "De Lara Guarch, Pablo" <pablo.de.lara.guarch@intel.com>
To: "Xie, Huawei" <huawei.xie@intel.com>, "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [PATCH v2] examples/vhost: fix strict aliasing error on gcc 4.4.7
Date: Wed, 9 Dec 2015 10:52:35 +0000 [thread overview]
Message-ID: <E115CCD9D858EF4F90C690B0DCB4D8973C86879C@IRSMSX108.ger.corp.intel.com> (raw)
In-Reply-To: <C37D651A908B024F974696C65296B57B4BB83892@SHSMSX103.ccr.corp.intel.com>
Hi Huawei,
> -----Original Message-----
> From: Xie, Huawei
> Sent: Wednesday, December 09, 2015 10:45 AM
> To: De Lara Guarch, Pablo; dev@dpdk.org
> Cc: yuanhan.liu@linux.intel.com
> Subject: Re: [PATCH v2] examples/vhost: fix strict aliasing error on gcc 4.4.7
>
> On 12/9/2015 5:40 PM, De Lara Guarch, Pablo wrote:
> > From: "De Lara Guarch, Pablo" <pablo.de.lara.guarch@intel.com>
> >
> > Fixes following error on gcc 4.4.7:
> >
> > make: Entering directory `/tmp/dpdk-tmp/examples/vhost'
> > CC main.o
> > cc1: warnings being treated as errors
> > /tmp/dpdk-tmp/examples/vhost/main.c: In function 'new_device':
> > /tmp/dpdk-tmp/x86_64-native-linuxapp-gcc/include/rte_ring.h:740:
> error:
> > dereferencing pointer 'mbuf.486' does break strict-aliasing rules
> > /tmp/dpdk-tmp/examples/vhost/main.c:1503: note: initialized from here
> > ...
> > /tmp/dpdk-tmp/examples/vhost/main.c:1503: note: initialized from here
> > /tmp/dpdk-tmp/x86_64-native-linuxapp-gcc/include/rte_ring.h:740:
> error:
> > dereferencing pointer '({anonymous})' does break strict-aliasing rules
> > /tmp/dpdk-tmp/examples/vhost/main.c:1804: note: initialized from here
> > make[1]: *** [main.o] Error 1
> >
> > Fixes: d19533e8 ("examples/vhost: copy old vhost example")
> >
> > Reported-by: Qian Xu <qian.q.xu@intel.com>
> > Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
> Acked-by: Huawei Xie <huawei.xie@intel.com>
>
I am going to send a v3 for this patch, removing the other casting that Bruce mentioned.
I will pre-ack it, unless you have any concerns.
Thanks,
Pablo
next prev parent reply other threads:[~2015-12-09 10:52 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-08 11:23 [PATCH] examples/vhost: fix strict aliasing error on gcc 4.4.7 Pablo de Lara
2015-12-09 9:12 ` Xie, Huawei
2015-12-09 9:39 ` [PATCH v2] " Pablo de Lara
2015-12-09 10:32 ` Bruce Richardson
2015-12-09 10:45 ` Xie, Huawei
2015-12-09 10:52 ` De Lara Guarch, Pablo [this message]
2015-12-09 11:09 ` [PATCH v3] " Pablo de Lara
2015-12-09 12:20 ` [PATCH v4] Fixes following error on gcc 4.4.7: Pablo de Lara
2015-12-09 13:28 ` Xie, Huawei
2015-12-09 14:01 ` De Lara Guarch, Pablo
2015-12-09 14:12 ` Xie, Huawei
2015-12-09 14:26 ` [PATCH v5] examples/vhost: fix strict aliasing error on gcc 4.4.7 Pablo de Lara
2015-12-09 14:33 ` Xie, Huawei
2015-12-09 20:54 ` Thomas Monjalon
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