[Pkg-dpdk-devel] Bug#917984: Bug#917984: Bug#917984: Can not link ODP with newer DPDK

[Dmitry Eremin-Solenikov]

Hello,

чт, 3 янв. 2019 г. в 02:09, Luca Boccassi <bluca at debian.org>:
> On Wed, 2019-01-02 at 14:55 +0300, Dmitry Eremin-Solenikov wrote:
> > ср, 2 янв. 2019 г. в 14:49, Luca Boccassi <bluca at debian.org>:
> > > On Wed, 2019-01-02 at 01:43 +0300, Dmitry Eremin-Solenikov wrote:
> > > Strange that libtool is messing things up, I've used the same
> > > pkgconfig
> > > file in a few different projects that use autoconf/automake and I
> > > haven't seen this issue.
> >
> > libtool rearranges/squashes linking flags in an attempt to find
> > 'better'
> > linking flags. Unfortunately this fail for DPDK. We have worked
> > around
> > this by squashing all PMDs into a single gcc argument:
> > -Wl,--whole-archive,-lrte_pmd_af_packet,-lrte_pmd_ark,........,-
> > lrte_pmd_vmxnet3_uio,--no-whole-archive
> > -ldpdk
> >
> > Thus libtool won't move PMDs from --whole-archive/--no-whole-archive
> > brackets.
> >
> > > I had a look on github, and it does not seem that odp is currently
> > > using pkg-config, but rather doing some manual check - is there a
> > > branch in a fork or a patch you could point me to so that I can try
> > > to
> > > reproduce?
> >
> > No, I have not pushed my code to github yet. The easies way to
> > reproduce
> > is to statically link a sample program with libtool and check that
> > generated
> > ELF contains all PMDs.
>
> That looks like a very very old libtool bug:
>
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=347650
>
> Have you tried patching config/ltmain.sh as it's suggested on that bug?

I can try doing that as a test, but I wouldn't like to have patched ltmain.sh
in the source tree.

> Something like:

[patch skipped]

> Note that the current version of Meson does not do a good job of
> generating the pkg-config file, but it's fixed in the version in
> development. I also found a couple of bugs in dpdk. So the following
> content for libdpdk.pc is more correct:

[libdpdk.pc skipped]

Do you plan to upload fixed dpdk packages?

> With that I can manually do a static link (without using libtool).

Good!

BTW: Is there any chance to get libdpdk.a back? We can then work
on fixing linking with libdpdk.pc as the time permits. Note: according
to README.md the 'official' DPDK build is one done using GNU Make
and this build has libdpdk.a instead of libdpdk.pc.

-- 
With best wishes
Dmitry