__attribute__((constructor, used)) doesn't work if build with static lib of dpdk/odp-dpdk

[lvsgate]

RTE_PMD_REGISTER_PCI(net_ixgbe, rte_ixgbe_pmd.pci_drv);
This line doesn't be called if build with static lib of dpdk/odp-dpdk, because this micro use attribute((constructor, used)).
The result is that "odp_packet_dpdk.c:162:setup_pkt_dpdk():No driver found for interface: 0"

[lvsgate]

Is There Anybody There????????????????????????

[iufl]

Hello,

Do you have more information on how you compile the OFP and ODP together? Or on which ODP version this happens?
This may not be an OFP error since it is related to ODP and DPDK. They can be compiled with --whole-archive parameter to get the unused symbols.

I did the following:

1. Got the latest ODP master branch from Linaro git
2. use scripts/build-dpdk-pktio script from ODP to compile with DPDK packet io
3. compile OFP with ODP
4. add interfaces to DPDK at created hugepages necessary for DPDK
5. run a test application to get traffic from another target

And it worked. It would be useful to get more information on which version of ODP and DPDK this happens.

[lvsgate]

@iufl I configure odp-dpdk with --enable-shared=no (default is yes)

1. odp-dpdk version: 1.15.0.0_DPDK_17.02
2. rm -rf <odp-dpdk installed dir>/lib/*
3. Add "--enable-shared=no" to scripts/build-dpdk-pktio

 ./bootstrap;
 ./configure  --enable-test-vald  --enable-test-perf --enable-test-cpp \
+             --enable-shared=no \
+             --prefix=<odp-dpdk installed dir> \
             --enable-debug --enable-debug-print \
             --with-dpdk-path=`pwd`/dpdk/${TARGET}
 make
+  make install

4. Compile OFP with ODP-DPDK
5. Run any test application and you will get the result

[sovu]

TSC 30.01.18

Iulia to raise an issue for this case to ODP mailing-list with more details about the missing symbol.

[iufl]

@lvsgate it looks like something related to ODP scripts.
Their github project : https://github.com/Linaro/odp
And their mailing list: https://lists.linaro.org/mailman/listinfo/lng-odp

[lvsgate]

Thank you. Some pull request may fix it.
https://lists.linaro.org/pipermail/lng-odp-dpdk/2018-January/002097.html

[sovu]

TSC meeting 06.02.18

Can someone confirm that this issue has been fixed in newer odp-dpdk versions using that pull request.

[lvsgate]

Refer to OpenDataPlane/odp-dpdk#15 (comment)