From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yuanhan Liu Subject: Re: clang compilation errors with clang 4.0 Date: Mon, 17 Apr 2017 15:52:42 +0800 Message-ID: <20170417075242.GO7333@yliu-dev.sh.intel.com> References: <20170414155552.GA24264@bricha3-MOBL3.ger.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: dev@dpdk.org To: Bruce Richardson Return-path: Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id 5FB0058FE for ; Mon, 17 Apr 2017 09:55:46 +0200 (CEST) Content-Disposition: inline In-Reply-To: <20170414155552.GA24264@bricha3-MOBL3.ger.corp.intel.com> List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" 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