由于缺少librte_pmd_bond.so，testpmd无法运行

Question

我已经在Centos 7上使用x86_64-native-linuxapp-gcc和选项构建并安装了DPDK v.18.11.9：

CONFIG_RTE_BUILD_SHARED_LIB=y

我们想要运行testpmd，但它无法加载：

$ ./x86_64-native-linuxapp-gcc/app/testpmd

./x86_64-native-linuxapp-gcc/app/testpmd: error while loading shared
libraries: librte_pmd_bond.so.2.1: cannot open shared object file: No such file or directory

这是预期的，因为lib/不包含librte_pmd_bond.so。

我应该使用什么构建选项来构建这个库？

向大卫致以最美好的问候

Answer 1

当忘记指向应用程序本身的库路径时，这是一个常见的错误。当使用共享模式构建DPDK库时，必须通过LD_LIBRARY_PATH指定dpdk共享对象的路径。如果不能做到这一点，我们就会得到

# ldd app/testpmd
        linux-vdso.so.1 (0x00007fff3eeb2000)
        librte_pmd_bond.so.2.1 => not found
        librte_pmd_dpaa.so.1.1 => not found
        librte_pmd_ixgbe.so.2.1 => not found
        librte_pmd_i40e.so.2.1 => not found
        librte_pmd_bnxt.so.2.1 => not found
        librte_pmd_softnic.so.1.1 => not found
        librte_pdump.so.2.1 => not found
        librte_metrics.so.1.1 => not found
        librte_bitratestats.so.2.1 => not found
        librte_latencystats.so.1.1 => not found
        librte_bpf.so.1.1 => not found
        librte_gro.so.1.1 => not found
        librte_gso.so.1.1 => not found
        librte_mbuf.so.4.1 => not found
        librte_net.so.1.1 => not found
        librte_ethdev.so.11.1 => not found
        librte_mempool.so.5.1 => not found
        librte_ring.so.2.1 => not found
        librte_eal.so.9.1 => not found
        librte_cmdline.so.2.1 => not found
        libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f1474089000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f1473c98000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f14745cf000)

从而运行我们得到的应用程序

 # ./app/testpmd
./app/testpmd: error while loading shared libraries: librte_pmd_bond.so.2.1: cannot open shared object file: No such file or directory

如上所述，要修复错误，请使用

export LD_LIBRARY_PATH=[path to dpdk shared libraries]

这解决了依赖关系和应用程序运行的问题。