Re: [dpdk-dev] [PATCH] ci: remove LTO job

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

On Mon, Nov 11, 2019 at 01:27:23PM +0100, David Marchand wrote:
> On Mon, Nov 11, 2019 at 12:32 PM Bruce Richardson
> <bruce.richardson@intel.com> wrote:
> >
> > On Fri, Nov 08, 2019 at 08:55:52PM +0100, Thomas Monjalon wrote:
> > > 08/11/2019 20:32, David Marchand:
> > > > The LTO job using gcc-7 has two issues at the moment:
> > > > - warnings about implicit fallthroughs trigger build errors:
> > > >
> > > > In file included from ...common/include/rte_memory.h:22:0,
> > > >                  from ...linux/eal/eal_hugepage_info.c:24:
> > > > ...common/include/rte_common.h: In function ‘rte_str_to_size’:
> > > > ...common/include/rte_common.h:744:27: error: this statement may
> > > >   fall through [-Werror=implicit-fallthrough=]
> > > >   case 'G': case 'g': size *= 1024; /* fall-through */
> > > >                       ~~~~~^~~~~~~
> > > >
> > > > - if we disable this warning, linking the binaries takes too much time
> > > >   and the job is terminated by Travis because it reaches the maximum
> > > >   time limit
> > > >
> > > > Fixes: 098cc0fea3be ("build: add option to enable LTO")
> > > >
> > > > Signed-off-by: David Marchand <david.marchand@redhat.com>
> > >
> > > Acked-by: Thomas Monjalon <thomas@monjalon.net>
> > >
> > > Thank you, I should have tested it in Travis before merging.
> > >
> > I'm also interested in whether someone can give steps to reproduce this
> > issue outside of the Travis environment. I've tested with gcc-7 on both
> > Ubuntu 16.04 (as used by Travis) and Ubuntu 18.04, and the builds I tested
> > all worked fine, without any warnings being seen. I am therefore wondering
> > what is special about the travis setup that causes it to fail.
> 
> Did you try with the custom apt repository that the LTO job was using ?
> -      apt:
> -        sources:
> -            - ubuntu-toolchain-r-test
> 
Yes, that repo was needed to get gcc-7 on Ubuntu 16.04, IIRC