I tried to put all the library into the command, but it still doesn't work. That's wired...
x86_64-poky-linux-gcc -m64 -march=core2 -mtune=core2 -msse3 -mfpmath=sse --sysroot=/home/hliu/atomos/build-temp/build/tmp/work/core2-64-poky-linux/unittest/0.0-r0/recipe-sysroot -Wl,--hash-style=gnu -Wl,--no-as-needed -o l2_ut_dpdk l2_ut_dpdk.c -Wall -Werror -g -lrte_mempool_stack -lrte_pmd_i40e -lrte_pmd_ark -lrte_ethdev -lrte_pmd_null -lrte_pmd_null_crypto -lrte_lpm -lrte_pmd_ena -lrte_kvargs -lrte_cmdline -lrte_pmd_tap -lrte_pmd_sw_event -lrte_latencystats -lrte_bitratestats -lrte_efd -lrte_sched -lrte_pmd_kni -lrte_pmd_qede -lrte_hash -lrte_pmd_enic -lrte_pdump -lrte_pmd_lio -lrte_acl -lrte_pmd_af_packet -lrte_eventdev -lrte_port -lrte_ip_frag -lrte_pmd_bond -lrte_pmd_sfc_efx -lrte_pmd_e1000 -lrte_mbuf -lrte_pmd_virtio -lrte_metrics -lrte_cryptodev -lrte_reorder -lrte_pmd_ring -lrte_eal -lrte_distributor -lrte_vhost -lrte_pmd_bnxt -lrte_timer -lrte_pmd_avp -lrte_pmd_crypto_scheduler -lrte_pmd_thunderx_nicvf -lrte_pmd_skeleton_event -lrte_pmd_nfp -lrte_jobstats -lrte_net -lrte_mempool -lrte_pmd_ixgbe -lrte_mempool_ring -lrte_pipeline -lrte_pmd_octeontx_ssovf -lrte_pmd_vhost -lrte_meter -lrte_pmd_cxgbe -lrte_kni -lrte_pmd_vmxnet3_uio -lrte_ring -lrte_pmd_fm10k -lrte_table -lrte_cfgfile -lpthread -ldl On Sun, Mar 4, 2018 at 9:08 PM, Hui Liu <[email protected]> wrote: > Hi Guys, > > I am using DPDK with the yocto build system. > > I found some static library is not linked because of the linker's > as-needed decision. > > Some .a file use __attribute__((constructor)) to register their APIs, > we only know if we use these APIs at runtime, but linker make the decision > early and then discarded them. > > I tried a lot to link the library I need: > > 1, use -Wl, --no-as-needed, for example: > gcc a.c *-Wl, --no-as-needed* -ldl -ldpdk > > 2, Put the library explicitly to the linker like this: > gcc a.c -Wl, --no-as-needed -ldl -ldpdk *-lrte_mempool* > > At last, I still didn't find my library in the elf file. > > Is there anything else I can try to link these library? > > -- > Thanks & Best Regards > Liu Hui > -- > -- Thanks & Best Regards Liu Hui --
