[vtk-developers] BandedPolyDataContourFilter failes to compile on Ubuntu 14

Tue Feb 5 17:20:40 EST 2019

Several arguments are contained in this thread.

On Tue, Feb 5, 2019, 2:15 PM Robert Maynard <robert.maynard at kitware.com
wrote:

> If RHEL8 comes I could see us dropping support for GCC 4.8, as RHEL7
> with dev-tools can be used, or RHE8.
>
> Either way, somebody needs to make official arguments on when/why we
> should drop gcc 4.8.
>
> On Tue, Feb 5, 2019 at 5:06 PM Bill Lorensen <bill.lorensen at gmail.com>
> wrote:
> >
> > I have no objections, never did. At least it forced me to update to gcc
> 8.2.
> >
> > If 4.8.5 is supported Kitware should have a dashboard for it.
> >
> > Red Hat 7.6 support and Ocyober 31, 2020. So I guess we'll support it
> until then.
> >
> >
> > On Tue, Feb 5, 2019, 1:50 PM Sankhesh Jhaveri <
> sankhesh.jhaveri at kitware.com wrote:
> >>
> >> Hi Bill,
> >>
> >> I don’t know why the minimum supported version is v4.8.3. However, the
> issue we have is with v4.8.5 which is the default compiler on the latest
> Red Hat OS (See https://access.redhat.com/solutions/19458 ); which merits
> maintaining support for it. Do you concur?
> >>
> >> Best,
> >> Sankhesh
> >>
> >>
> >> On Tue, Feb 5, 2019 at 4:40 PM Bill Lorensen <bill.lorensen at gmail.com>
> wrote:
> >>>
> >>> I saw the MR. My question is why are we supporting an old compiler. I
> think that's what the argument against my first post in this thread.
> >>>
> >>> On Tue, Feb 5, 2019, 1:34 PM Sankhesh Jhaveri <
> sankhesh.jhaveri at kitware.com wrote:
> >>>>
> >>>> FWIW, I have a MR here:
> https://gitlab.kitware.com/vtk/vtk/merge_requests/5157
> >>>>
> >>>>
> >>>> On Tue, Feb 5, 2019 at 4:32 PM Robert Maynard <
> robert.maynard at kitware.com> wrote:
> >>>>>
> >>>>> I meant GCC 4.8.3/5 is a supported compiler by VTK not GCC itself.
> >>>>>
> >>>>> On Tue, Feb 5, 2019 at 4:29 PM Bill Lorensen <
> bill.lorensen at gmail.com> wrote:
> >>>>> >
> >>>>> > Gcc 4.8 is no longer maintained. See
> >>>>> > https://www.gnu.org/software/gcc/gcc-4.8/
> >>>>> >
> >>>>> >
> >>>>> >
> >>>>> > On Tue, Feb 5, 2019, 1:27 PM Robert Maynard <
> robert.maynard at kitware.com wrote:
> >>>>> >>
> >>>>> >> I wasn't paying attention to the thread. GCC 4.8.3 is a supported
> >>>>> >> compiler and until we remove it we have to accept that we need to
> >>>>> >> support it.
> >>>>> >>
> >>>>> >> On Tue, Feb 5, 2019 at 4:21 PM Bill Lorensen <
> bill.lorensen at gmail.com> wrote:
> >>>>> >> >
> >>>>> >> > What happened to the arguments against my complaints about this
> error?
> >>>>> >> >
> >>>>> >> > Bill
> >>>>> >> >
> >>>>> >> > On Tue, Feb 5, 2019, 9:23 AM Sankhesh Jhaveri <
> sankhesh.jhaveri at kitware.com wrote:
> >>>>> >> >>
> >>>>> >> >> Sweet, thanks Rob,
> >>>>> >> >>
> >>>>> >> >>
> >>>>> >> >> On Tue, Feb 5, 2019 at 11:31 AM Robert Maynard <
> robert.maynard at kitware.com> wrote:
> >>>>> >> >>>
> >>>>> >> >>> Here is a drop-in wrapper for rotate that has the C++11
> behavior but
> >>>>> >> >>> also works with GCC 4.8 ( https://godbolt.org/z/1aVjiZ ).
> >>>>> >> >>>
> >>>>> >> >>> On Tue, Feb 5, 2019 at 10:29 AM Bill Lorensen <
> bill.lorensen at gmail.com> wrote:
> >>>>> >> >>> >
> >>>>> >> >>> > I don't have a fix. Best if you can look.
> >>>>> >> >>> >
> >>>>> >> >>> > I've built gcc 8.2 do I don't have a problem.
> >>>>> >> >>> >
> >>>>> >> >>> > Bill
> >>>>> >> >>> >
> >>>>> >> >>> > On Tue, Feb 5, 2019, 7:20 AM Sankhesh Jhaveri <
> sankhesh.jhaveri at kitware.com wrote:
> >>>>> >> >>> >>
> >>>>> >> >>> >> Bill,
> >>>>> >> >>> >>
> >>>>> >> >>> >> It would be great if you have a fix, neverthless. A
> customer noticed the same issue on Red Hat GCC v4.8.5 20150623. The README
> says VTK requires gcc  v4.8.3 or newer.
> >>>>> >> >>> >>
> >>>>> >> >>> >> Let me know if you would rather I look into a fix for it.
> >>>>> >> >>> >>
> >>>>> >> >>> >> Thanks,
> >>>>> >> >>> >> Sankhesh
> >>>>> >> >>> >>
> >>>>> >> >>> >>
> >>>>> >> >>> >> On Tue, Feb 5, 2019 at 1:27 AM Bill Lorensen <
> bill.lorensen at gmail.com> wrote:
> >>>>> >> >>> >>>
> >>>>> >> >>> >>> Sean,
> >>>>> >> >>> >>>
> >>>>> >> >>> >>> Thanks for the suggestion. I was able to build gcc 8.2 on
> my Ubuntu
> >>>>> >> >>> >>> 14.04 system. Only a little tricky. Took several hours to
> compile.
> >>>>> >> >>> >>>
> >>>>> >> >>> >>> I have successfully built VTK HEAD and the VTKExamples.
> All VTK tests passed.
> >>>>> >> >>> >>>
> >>>>> >> >>> >>> No more bitching from me (about this topic anyway0>
> >>>>> >> >>> >>>
> >>>>> >> >>> >>> The compiler did expose some new warnings which I'll fix.
> >>>>> >> >>> >>>
> >>>>> >> >>> >>> Bill
> >>>>> >> >>> >>>
> >>>>> >> >>> >>> On Mon, Feb 4, 2019 at 8:38 AM Sean McBride <
> sean at rogue-research.com> wrote:
> >>>>> >> >>> >>> >
> >>>>> >> >>> >>> > On Thu, 31 Jan 2019 20:37:32 -0500, David Thompson via
> vtk-developers said:
> >>>>> >> >>> >>> >
> >>>>> >> >>> >>> > >I'm not sure it is a good idea to support old
> compilers and distributions:
> >>>>> >> >>> >>> > >
> >>>>> >> >>> >>> > >1. Ubuntu 14.04 LTS will lose support from Canonical
> in 3 months. I
> >>>>> >> >>> >>> > >would be surprised if what is in git master is
> released by then. Why
> >>>>> >> >>> >>> > >should we support platforms no longer supported by
> their distributor?
> >>>>> >> >>> >>> >
> >>>>> >> >>> >>> > Is the compiler so tied to the OS?  Bill, can't you
> upgrade your compiler without updating your whole OS?
> >>>>> >> >>> >>> >
> >>>>> >> >>> >>> > >2. If we keep forcing workarounds, the next time
> something breaks, then
> >>>>> >> >>> >>> > >*it* will be the only compiler error. That pattern
> just keeps accruing
> >>>>> >> >>> >>> > >technical debt. Ultimately, I believe that technical
> debt will push
> >>>>> >> >>> >>> > >developers away from VTK so I want to avoid it.
> >>>>> >> >>> >>> > >
> >>>>> >> >>> >>> > >3. Not too long ago, it was common practice for
> systems in production
> >>>>> >> >>> >>> > >use to never get patched (lest the patch break what
> was working).
> >>>>> >> >>> >>> >
> >>>>> >> >>> >>> > Not that we (programmers collectively) have solved the
> problem of patches always breaking things that work.  It's still the norm.
> :(
> >>>>> >> >>> >>> >
> >>>>> >> >>> >>> > >However, security issues and increased connectivity
> prevalent today has
> >>>>> >> >>> >>> > >pretty much put a stop to this practice and I think
> that translates into
> >>>>> >> >>> >>> > >a much weaker argument for supporting older systems.
> >>>>> >> >>> >>> >
> >>>>> >> >>> >>> > I largely agree, but there are exceptions.
> >>>>> >> >>> >>> >
> >>>>> >> >>> >>> > Perhaps less on linux, but newer versions of macOS
> often drop support for older hardware.  So it's not always easy or cheap to
> just keep all software up-to-date.
> >>>>> >> >>> >>> >
> >>>>> >> >>> >>> > Cheers,
> >>>>> >> >>> >>> >
> >>>>> >> >>> >>> > --
> >>>>> >> >>> >>> > Sean
> >>>>> >> >>> >>> >
> >>>>> >> >>> >>> >
> >>>>> >> >>> >>>
> >>>>> >> >>> >>>
> >>>>> >> >>> >>> --
> >>>>> >> >>> >>> Unpaid intern in BillsParadise at noware dot com
> >>>>> >> >>> >>> _______________________________________________
> >>>>> >> >>> >>> Powered by www.kitware.com
> >>>>> >> >>> >>>
> >>>>> >> >>> >>> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
> >>>>> >> >>> >>>
> >>>>> >> >>> >>> Search the list archives at:
> http://markmail.org/search/?q=vtk-developers
> >>>>> >> >>> >>>
> >>>>> >> >>> >>> Follow this link to subscribe/unsubscribe:
> >>>>> >> >>> >>> https://vtk.org/mailman/listinfo/vtk-developers
> >>>>> >> >>> >>>
> >>>>> >> >>> >> --
> >>>>> >> >>> >>
> >>>>> >> >>> >> Sankhesh Jhaveri
> >>>>> >> >>> >>
> >>>>> >> >>> >> Sr. Research & Development Engineer | Kitware | (518)
> 881-4417
> >>>>> >> >>> >
> >>>>> >> >>> > _______________________________________________
> >>>>> >> >>> > Powered by www.kitware.com
> >>>>> >> >>> >
> >>>>> >> >>> > Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
> >>>>> >> >>> >
> >>>>> >> >>> > Search the list archives at:
> http://markmail.org/search/?q=vtk-developers
> >>>>> >> >>> >
> >>>>> >> >>> > Follow this link to subscribe/unsubscribe:
> >>>>> >> >>> > https://vtk.org/mailman/listinfo/vtk-developers
> >>>>> >> >>> >
> >>>>> >> >>
> >>>>> >> >> --
> >>>>> >> >>
> >>>>> >> >> Sankhesh Jhaveri
> >>>>> >> >>
> >>>>> >> >> Sr. Research & Development Engineer | Kitware | (518) 881-4417
> >>>>
> >>>> --
> >>>>
> >>>> Sankhesh Jhaveri
> >>>>
> >>>> Sr. Research & Development Engineer | Kitware | (518) 881-4417
> >>
> >> --
> >>
> >> Sankhesh Jhaveri
> >>
> >> Sr. Research & Development Engineer | Kitware | (518) 881-4417
>
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