[ovs-dev] [PATCH] build: check libibverbs deps before linking with dpdk

[Harold Huang]

Hi, Maximets,

I have found this build error message in both dpdk 20.11.3 and
20.11.1.  I did not make any change to dpdk. I use the following
command to build dpdk:

 meson builddir && cd builddir &&   meson configure
--prefix=/usr/local -Dexamples='' -Dtests=false -Denable_kmods=false
-Denable_docs=false
-Ddisable_drivers=event/*,crypto/*,net/mlx4,net/mlx5 &&   ninja &&
ninja install

I am also puzzled because DPDK is built successfully and it does not
need libibverbs.

Thanks

Ilya Maximets <i.maximets at ovn.org> 于2021年11月10日周三 下午7:55写道：
>
> On 11/10/21 05:10, Harold Huang wrote:
> > When I build ovs-dpdk without mlx4/mlx5 driver, the configure log is as
> > follows:
> >
> > checking for DPDK... yes
> > checking for faulty pkg-config version... no
> > checking for rte_config.h... yes
> > checking whether RTE_LIBRTE_VHOST_NUMA is declared... yes
> > checking for library containing get_mempolicy... -lnuma
> > checking whether RTE_EAL_NUMA_AWARE_HUGEPAGES is declared... yes
> > checking for library containing get_mempolicy... (cached) -lnuma
> > checking whether RTE_LIBRTE_PMD_PCAP is declared... yes
> > checking for library containing pcap_dump_close... -lpcap
> > checking whether RTE_LIBRTE_PMD_AF_XDP is declared... no
> > checking whether RTE_LIBRTE_VHOST_NUMA is declared... (cached) yes
> > checking whether RTE_LIBRTE_MLX5_PMD is declared... no
> > checking whether RTE_LIBRTE_MLX4_PMD is declared... no
> > checking for library containing dlopen... -ldl
> > checking whether linking with dpdk works... no
> > configure: error: Could not find DPDK library in default search path,
> > update PKG_CONFIG_PATH for pkg-config to find the .pc file in non-standard
> > location
> >
> > The error log is puzzled because I indeed have configured PKG_CONFIG_PATH
> > in the right way. After checking the config.log we found libibverbs is
> > needed when linking with dpdk:
> >
> > configure:31517: checking whether linking with dpdk works
> > configure:31533: gcc -o conftest -g -O2 -DHAVE_AVX512F -mno-avx512f
> > -I/usr/local/include -include rte_config.h -march=native -mno-avx512f
> >  conftest.c -Wl,--whole-archive -L/usr/local/lib64 -l:librte_common_cpt.a
> > -l:librte_common_dpaax.a -l:librte_common_iavf.a
> > -l:librte_common_octeontx.a -l:librte_common_octeontx2.a
> > -l:librte_common_sfc_efx.a -l:librte_bus_dpaa.a -l:librte_bus_fslmc.a
> > -l:librte_bus_ifpga.a -l:librte_bus_pci.a -l:librte_bus_vdev.a
> > -l:librte_bus_vmbus.a -l:librte_common_qat.a -l:librte_mempool_bucket.a
> > -l:librte_mempool_dpaa.a -l:librte_mempool_dpaa2.a
> > -l:librte_mempool_octeontx.a -l:librte_mempool_octeontx2.a
> > -l:librte_mempool_ring.a -l:librte_mempool_stack.a
> > -l:librte_net_af_packet.a -l:librte_net_ark.a -l:librte_net_atlantic.a
> > -l:librte_net_avp.a -l:librte_net_axgbe.a -l:librte_net_bond.a
> > -l:librte_net_bnx2x.a -l:librte_net_bnxt.a -l:librte_net_cxgbe.a
> > -l:librte_net_dpaa.a -l:librte_net_dpaa2.a -l:librte_net_e1000.a
> > -l:librte_net_ena.a -l:librte_net_enetc.a -l:librte_net_enic.a
> > -l:librte_net_failsafe.a -l:librte_net_fm10k.a -l:librte_net_i40e.a
> > -l:librte_net_hinic.a -l:librte_net_hns3.a -l:librte_net_iavf.a
> > -l:librte_net_ice.a -l:librte_net_igc.a -l:librte_net_ixgbe.a
> > -l:librte_net_kni.a -l:librte_net_liquidio.a -l:librte_net_memif.a
> > -l:librte_net_netvsc.a -l:librte_net_nfp.a -l:librte_net_null.a
> > -l:librte_net_octeontx.a -l:librte_net_octeontx2.a -l:librte_net_pcap.a
> > -l:librte_net_pfe.a -l:librte_net_qede.a -l:librte_net_ring.a
> > -l:librte_net_sfc.a -l:librte_net_softnic.a -l:librte_net_tap.a
> > -l:librte_net_thunderx.a -l:librte_net_txgbe.a -l:librte_net_vdev_netvsc.a
> > -l:librte_net_vhost.a -l:librte_net_virtio.a -l:librte_net_vmxnet3.a
> > -l:librte_raw_dpaa2_cmdif.a -l:librte_raw_dpaa2_qdma.a -l:librte_raw_ioat.a
> > -l:librte_raw_ntb.a -l:librte_raw_octeontx2_dma.a
> > -l:librte_raw_octeontx2_ep.a -l:librte_raw_skeleton.a
> > -l:librte_compress_octeontx.a -l:librte_compress_zlib.a
> > -l:librte_regex_octeontx2.a -l:librte_vdpa_ifc.a -l:librte_baseband_null.a
> > -l:librte_baseband_turbo_sw.a -l:librte_baseband_fpga_lte_fec.a
> > -l:librte_baseband_fpga_5gnr_fec.a -l:librte_baseband_acc100.a
> > -l:librte_node.a -l:librte_graph.a -l:librte_bpf.a
> > -l:librte_flow_classify.a -l:librte_pipeline.a -l:librte_table.a
> > -l:librte_port.a -l:librte_fib.a -l:librte_ipsec.a -l:librte_vhost.a
> > -l:librte_stack.a -l:librte_security.a -l:librte_sched.a
> > -l:librte_reorder.a -l:librte_rib.a -l:librte_regexdev.a -l:librte_rawdev.a
> > -l:librte_pdump.a -l:librte_power.a -l:librte_member.a -l:librte_lpm.a
> > -l:librte_latencystats.a -l:librte_kni.a -l:librte_jobstats.a
> > -l:librte_ip_frag.a -l:librte_gso.a -l:librte_gro.a -l:librte_eventdev.a
> > -l:librte_efd.a -l:librte_distributor.a -l:librte_cryptodev.a
> > -l:librte_compressdev.a -l:librte_cfgfile.a -l:librte_bitratestats.a
> > -l:librte_bbdev.a -l:librte_acl.a -l:librte_timer.a -l:librte_hash.a
> > -l:librte_metrics.a -l:librte_cmdline.a -l:librte_pci.a -l:librte_ethdev.a
> > -l:librte_meter.a -l:librte_net.a -l:librte_mbuf.a -l:librte_mempool.a
> > -l:librte_rcu.a -l:librte_ring.a -l:librte_eal.a -l:librte_telemetry.a
> > -l:librte_kvargs.a -Wl,--no-whole-archive -Wl,--export-dynamic
> > -Wl,--as-needed -lrte_node -lrte_graph -lrte_bpf -lrte_flow_classify
> > -lrte_pipeline -lrte_table -lrte_port -lrte_fib -lrte_ipsec -lrte_vhost
> > -lrte_stack -lrte_security -lrte_sched -lrte_reorder -lrte_rib
> > -lrte_regexdev -lrte_rawdev -lrte_pdump -lrte_power -lrte_member -lrte_lpm
> > -lrte_latencystats -lrte_kni -lrte_jobstats -lrte_ip_frag -lrte_gso
> > -lrte_gro -lrte_eventdev -lrte_efd -lrte_distributor -lrte_cryptodev
> > -lrte_compressdev -lrte_cfgfile -lrte_bitratestats -lrte_bbdev -lrte_acl
> > -lrte_timer -lrte_hash -lrte_metrics -lrte_cmdline -lrte_pci -lrte_ethdev
> > -lrte_meter -lrte_net -lrte_mbuf -lrte_mempool -lrte_rcu -lrte_ring
> > -lrte_eal -lrte_telemetry -lrte_kvargs -pthread -lm -ldl -lnuma -lz -lpcap
> > -libverbs  -ldl -lpcap -lnuma -lnuma -latomic -lpthread -lrt -lm  -lunbound
> >> &5
> > /usr/bin/ld: cannot find -libverbs
>
> Hi.  I'm puzzled with how did you got into this situation in a first place?
> ibverbs should not be required if none of mlx drivers built into DPDK.
> It must be a problem with pkg-config file generated by DPDK build process.
>
> What DPDK version are you using?  Does it have some custom changes?
>
> Best regards, Ilya Maximets.