[dpdk-dev] clang compilation errors with clang 4.0

[Bruce Richardson <bruce.richardson@intel.com>]

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);
                                               ^~~~~~~~~~~~~~~~~