From: Yuanhan Liu <yuanhan.liu@linux.intel.com>
To: Bruce Richardson <bruce.richardson@intel.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] clang compilation errors with clang 4.0
Date: Mon, 17 Apr 2017 15:52:42 +0800 [thread overview]
Message-ID: <20170417075242.GO7333@yliu-dev.sh.intel.com> (raw)
In-Reply-To: <20170414155552.GA24264@bricha3-MOBL3.ger.corp.intel.com>
On Fri, Apr 14, 2017 at 04:55:53PM +0100, Bruce Richardson wrote:
> Hi all,
>
> just a heads-up that there are compilation errors showing up with
> compiling DPDK with clang 4.0 release. Here are some of the errors I am
> seeing. Volunteers to do patches for some of them welcome.
>
> Regards,
> /Bruce
>
> /home/bruce/dpdk.org/lib/librte_eal/common/eal_common_tailqs.c:92:24: warning: taking address of packed member 'qlock' of class or structure 'rte_mem_config' may result in an unaligned pointer value [-Waddress-of-packed-member]
> rte_rwlock_read_lock(&mcfg->qlock);
> ^~~~~~~~~~~
>
>
> /home/bruce/dpdk.org/lib/librte_eventdev/rte_eventdev.c:371:6: warning: logical not is only applied to the left hand side of this bitwise operator [-Wlogical-not-parentheses]
> if (!dev_conf->event_dev_cfg & RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT) {
> ^ ~
>
> /home/bruce/dpdk.org/lib/librte_ip_frag/rte_ipv4_reassembly.c:139:31: warning: taking address of packed member 'src_addr' of class or structure 'ipv4_hdr' may result in an unaligned pointer value [-Waddress-of-packed-member]
> psd = (unaligned_uint64_t *)&ip_hdr->src_addr;
> ^~~~~~~~~~~~~~~~
>
> /home/bruce/dpdk.org/lib/librte_vhost/vhost_user.c:1037:34: warning: taking address of packed member 'payload' of class or structure 'VhostUserMsg' may result in an unaligned pointer value [-Waddress-of-packed-member]
> vhost_user_set_vring_num(dev, &msg.payload.state);
> ^~~~~~~~~~~~~~~~~
Besides the 2nd warnign, all others are the same. Though I'm not quite
sure others, for this vhost-user one, I think it's a false-positive
warning.
--yliu
prev parent reply other threads:[~2017-04-17 7:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-14 15:55 Bruce Richardson
2017-04-17 7:52 ` Yuanhan Liu [this message]
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