Re: mpich always injects lto flags

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On Wed, Aug 5, 2020 at 7:01 PM Christoph Junghans <junghans@xxxxxxxxx> wrote:
>
> On Wed, Aug 5, 2020 at 2:21 PM Jeff Law <law@xxxxxxxxxx> wrote:
> >
> > On Wed, 2020-08-05 at 21:56 +0200, David Schwörer wrote:
> > > On 8/5/20 8:45 PM, Christoph Junghans wrote:
> > > > Hi,
> > > >
> > > > I am trying to rebuild espresso to adapt to the recent cmake changes,
> > > > when doing this I hit
> > > > https://github.com/espressomd/espresso/issues/3396, which prevents us
> > > > from compiling espresso with -lto, so I set _lto_cflags to %{nil},
> > > > which works for the build with openmpi, but gets ignored for the mpich
> > > > build.
> > > >
> > > > I think the problem is that CMake picks up the lto flags from mpicxx
> > > > and then puts them in
> > > > MPI_CXX_COMPILE_OPTIONS. (Also compare mpicc -show).
> > > >
> > > > So I think the fix would be to strip these flags from mpicc. Sounds reasonable?
> > > >
> > > > The flags also contain
> > > > '-specs=/usr/lib/rpm/redhat/redhat-hardened-cc1', which effectively
> > > > makes it depend on redhat-rpm-config. We had a similar issue in hdf5 a
> > > > while back: https://bugzilla.redhat.com/show_bug.cgi?id=1794625
> > > >
> > > > Christoph
> > > >
> > > Another related bug is:
> > >
> > > https://bugzilla.redhat.com/show_bug.cgi?id=1821728
> > Note that the BZ complains about -fstack-clash-protection in LLVM which has had
> > various bits landing over the last few months.  So that specific issue I'd expect
> > to resolve itself over time.  The more general issue remains though.
> https://src.fedoraproject.org/rpms/mpich/pull-request/4

Can any proven package retrigger
https://koji.fedoraproject.org/koji/taskinfo?taskID=48824350, the
tests seem flaky and passed for me here:
https://koji.fedoraproject.org/koji/taskinfo?taskID=48825280

Thanks,

Christoph

>
> Christoph
> >
> > jeff
> > >
> > _______________________________________________
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>
>
>
> --
> Christoph Junghans
> Web: http://www.compphys.de



--
Christoph Junghans
Web: http://www.compphys.de
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