Re: [dpdk-stable] [dpdk-dev] 19.11.4 patches review and test

[Bruce Richardson <bruce.richardson@intel.com>]

On Tue, Sep 01, 2020 at 02:32:26PM +0200, Christian Ehrhardt wrote:
> On Tue, Sep 1, 2020 at 10:30 AM Luca Boccassi <bluca@debian.org> wrote:
> >
> > On Tue, 2020-08-18 at 19:12 +0100, Luca Boccassi wrote:
> > > Hi all,
> > >
> > > Here is a list of patches targeted for stable release 19.11.4.
> > >
> > > The planned date for the final release is August 31st.
> > >
> > > Please help with testing and validation of your use cases and report
> > > any issues/results with reply-all to this mail. For the final release
> > > the fixes and reported validations will be added to the release notes.
> > >
> > > A release candidate tarball can be found at:
> > >
> > >     https://dpdk.org/browse/dpdk-stable/tag/?id=v19.11.4-rc1
> > >
> > > These patches are located at branch 19.11 of dpdk-stable repo:
> > >     https://dpdk.org/browse/dpdk-stable/
> > >
> > > Thanks.
> > >
> > > Luca Boccassi
> >
> > Microsoft's regression tests are still running, delaying until Thursday
> > the 3rd. Apologies for any inconvenience.
> 
> Due to report on OVS failing to build I happened to find that 19.11.4
> has massively changed linking.
> => https://paste.ubuntu.com/p/znCRR4gpjP/
> 
> This was meant to be helpful for sure and I assume is around:
> 48f7fd27f6 build/pkg-config: prevent overlinking
> 2d1535d592 build/pkg-config: improve static linking flags
> 9fb13a12c1 build/pkg-config: output drivers first for static build
> 59b108d824 build/pkg-config: move pkg-config file creation
> aea915e944 devtools: test static linkage with pkg-config
> 
> But overlinking has effectively become underlinking now
> https://launchpadlibrarian.net/495845224/buildlog_ubuntu-groovy-amd64.openvswitch_2.13.1-0ubuntu2~ppa1_BUILDING.txt.gz
> 
> /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/../../../x86_64-linux-gnu/librte_pmd_ring.a(net_ring_rte_eth_ring.c.o):
> in function `rte_eth_from_rings':
> (.text+0x91c): undefined reference to `rte_vdev_init'
> /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/../../../x86_64-linux-gnu/librte_pmd_ring.a(net_ring_rte_eth_ring.c.o):
> in function `vdrvinitfn_pmd_ring_drv':
> (.text.startup+0x28): undefined reference to `rte_vdev_register'
> collect2: error: ld returned 1 exit status
> 
> Also as you can see in the pastebin above, CFlags and Libs massively
> shrunk and likely too much so.
> 
> Given that this should be a stable release I'd ask to back out those
> changes so that a test build creates the same .pc file as before -
> would that make sense?
> 
> 
Adding some OVS folks on CC.

The request for backporting these actually came from the OVS side, since
they were deemed necessary to enable OVS to switch to use DPDK pkg-config
rather than the older approach using a makefile-based build. However, it
appears you guys were already building OVS using the pkg-config file, and
since this causes issues where there were none, backing it out seems a
prudent choice.

Ian, Sunil, any comments here.

Regards
/Bruce