On 01/07/2016 10:42, Elo, Matias (Nokia - FI/Espoo) wrote: >>>>>> What is not clear to me is motivation to use weak here instead of simply >>> using >CONFIG_RTE_I40E_INC_VECTOR >>>>>> macro to exclude stubs in i40e_rxtx.c. It will make library smaller and >>>>>> avoid >>> issues like this one >>>>>> which are quite hard to troubleshoot. >>>>> Since this issue seen in fd.io, I didn't investigated more, but I don't >>>>> want to clock your valid question, this is an attempt to resurrect the >>>>> question ... >>>> Hi, >>>> >>>> We are having exactly the same problem. For us the aforementioned >>> workaround doesn't seem to work and vector mode is always disabled with the >>> i40e drivers. If I modify i40e_rxtx.c and exclude the stub functions using >>> CONFIG_RTE_I40E_INC_VECTOR everything works as expected. >>>> We are building DPDK with the CONFIG_RTE_BUILD_COMBINE_LIBS option >>> enabled and link DPDK library to our application. >>>> Any other ideas how this could be fixed? >>>> >>>> Regards, >>>> Matias >>>> >>> So you have tried to link a combined static lib with --whole-archive >>> -ldpdk --no-whole-archive and still get the wrong/weak function definition? >>> >>> Sergio >> I actually just managed to fix the problem. In our case I had to add >> '-Wl,--whole-archive,-ldpdk,--no-whole-archive' to the end of AM_LDFLAGS. >> > It turned out that the problem actually wasn't fixed. > > DPDK is built with CONFIG_RTE_BUILD_COMBINE_LIBS=y and EXTRA_CFLAGS="-fPIC" > > What we are linking originally: > -l:libdpdk.a > > This works otherwise but vector mode i40e is not enabled. > > When trying: > -Wl,--whole-archive,-l:libdpdk.a,--no-whole-archive > > Linking fails with ' undefined reference' errors to several dpdk functions > (rte_eal_init, rte_cpu_get_flag_enabled, rte_eth_stats_get...). > > Btw. there seems to be a Stack Overflow question related to this: > http://stackoverflow.com/questions/38064021/dpdk-include-libraries-in-dpdk-application-compiled-as-shared-library > > -Matias
What DPDK version are you using?
