Re: [dpdk-dev] [PATCH 1/8] app: link the whole rte_cfgfile library

[Tomasz Duszynski <tdu@semihalf.com>]

On Tue, Sep 26, 2017 at 03:31:18PM +0100, Bruce Richardson wrote:
> On Tue, Sep 26, 2017 at 11:39:58AM +0200, Tomasz Duszynski wrote:
> > Since MRVL NET PMD needs librte_cfgfile to parse QoS configuration file
> > link it as the whole library.
> >
> > Signed-off-by: Jacek Siuda <jck@semihalf.com>
> > Signed-off-by: Tomasz Duszynski <tdu@semihalf.com>
> > ---
>
> Can you clarify a bit more why this is needed? For a static build, the
> cfgfile should be linked in to the after the PMDs, so the dependencies
> in the driver should be satisfied in the link. For a dynamic build, the
> PMD should depend upon the cfgfile directly, and use it at runtime
> appropriately.
> Am I missing something?
>
> /Bruce
Hi Bruce,

You are correct, all dependencies in the driver will be satisfied.
The reason this change was introduced is that, librte_pmd_mrvl.a
contains undefined symbols from librte_cfgfile.a thus linking
applications under app/ directory will fail as librte_cfgfile.a comes
before librte_pmd_mrvl.a during the linking stage.

Linking librte_cfgfile.a with --whole-archive solves the issue.

--
- Tomasz Duszyński