[dpdk-dev] Can not init NIC after merge to DPDK 1.7 problem

["Wang, Shawn" <xingbow@amazon.com>]

Hi:

We are using our own Makefile in building dpdk program. Recently we are working on upgrading from DPDK 1.3 to DPDK 1.7. I found the rte_ixgbe_pmd_init has been replaced by PMD_REGISTER_DRIVER. So I delete rte_ixgbe_pmd_init calls. But after that, our dpdk program could not correctly find the NIC anymore. After digging into it a little more, I found the code dose not correctly register the driver type we are using, which is ixgbe.
To isolate the problem, I hacked a smal example l3fwd, and only have the main.c file like this for my testing purpose.

#include <rte_config.h>
#include <rte_eal.h>

#include "main.h"

int
MAIN(int argc, char **argv)
{
        /* init EAL */
        int ret = rte_eal_init(argc, argv);
        printf("ret %d\n", ret);
        return 0;
}

I found if I use the Makefile provided in the example, the program will find the ixgbe NIC. But if I just use these 2 commands to compile and link it. It will not find the ixgbe NIC.

gcc -I../../x86_64-native-linuxapp-gcc/include -L../../x86_64-native-linuxapp-gcc/lib -lrte_eal -c main.c
gcc -o l3fwd main.o -L../../x86_64-native-linuxapp-gcc/lib -lrte_eal -lrte_distributor -lrte_pipeline -lrte_port -lrte_timer -lrte_hash -lrte_acl -lm -lrt -lrte_mbuf -lethdev -lrte_malloc -lrte_mempool -lrte_ring -lc -lm -lrte_cmdline -lrte_cfgfile -lrte_pmd_bond -lrte_pmd_ixgbe -lrte_pmd_e1000 -lrte_pmd_ring -lpthread -ldl -lrt

Can someone share some light on what is magic of the dpdk Makefile to correctly register the NIC type?

Thank you so much.
Xingbo Wang