Re: [dpdk-dev] Debugging EAL PCI / Driver Init

[Alex Markuze <alex@weka.io>]

Hi Matt, Dev
I'm Trying to compile ann app linking to dpdk and dpdk based libs.
And I'm seeing the same issue you've reported.
The probe function doesn't seem to find any ixgbevf(SRIOV VM) ports.
Same code compiled as a dpdk app works fine.

In your solution to this issue you are referring to  -lintel_dpdk? I
couldn't find any reference to it.

Thanks
Alex.


On Sat, Aug 2, 2014 at 7:46 PM, Matthew Hall <mhall@mhcomputing.net> wrote:
> On Sun, Aug 03, 2014 at 01:37:06AM +0900, Masaru Oki wrote:
>> cc links library funtion from archive only if call from other object.
>> but new dpdk pmd library has constractor section and not call directly.
>> ld always links library funtion with constractor section.
>> use -Xlinker, or use ld instead of cc.
>
> Hello Oki-san,
>
> The trick to fix it was this, I finally found it in the example Makefiles with
> V=1 flag.
>
> -Wl,--whole-archive -Wl,--start-group -lintel_dpdk -Wl,--end-group -Wl,--no-whole-archive
>
> Thank you for the advice you provided, I couldn't have fixed it without your
> suggestions... it got me to look more closely at the linking. Importantly,
> "-Wl,--whole-archive" includes the entire archive whether or not it's called
> from other objects, so we don't lose the constructors, just like you said.
>
> Matthew.