Re: Can not init NIC after merge to DPDK 1.7 problem

We ran into a similar problem when migrating to 1.7.
Here are the subtle flags, in dpdk/mk/rte.app.mk, that we needed:

	LDLIBS += --whole-archive
	...
	LDLIBS += --no-whole-archive

This apparently tells the linker to pull in whole archive(s), even if it
thinks that we don't need all objects.




--
Regards,
Robert

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rte_ixgbe_pmd_init has been replaced by PMD_REGISTER_DRIVER.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