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Subject: Re: [OMPI devel] trunk build failure on {Free,Net,Open}BSD
From: Ralph Castain (rhc_at_[hidden])
Date: 2014-01-09 17:36:08


The windows reference is stale on that branch - I'll remove it when applying the cmr. We no longer support native Windows, and never did on the 1.7 series.

On Jan 9, 2014, at 2:08 PM, Paul Hargrove <phhargrove_at_[hidden]> wrote:

> Jeff,
>
> The changes as described in the commit message make good sense to me except for one thing:
>
> In the 1.7 branch there is still a defined(__WINDOWS__) case for which opal_path_nfs() is currently a no-op . So, I fear that if CMR'ed blindly both the configure-time and build-time checks to ensure that at least one of statfs() or statvs() will abort the build on Windows. Maybe Marco can say more on the subject, but I think Cygwin will detect one or both of the stat calls, but opal_path_nfs() will still be a no-op due to the __WINDOWS__ guard.
>
>
> I'll be building tonight's trunk tarball on all of my Solaris and *BSD systems. So, I can at least confirm that the code builds (finds at least one of statfs() or statvfs()) on each platform.
>
> However, only my Solaris (10/SPARC and 11/x86-64) systems have NFS-mounted filesystems. So, I don't have any means to ensure that the "newly active" code performs correctly on the BSD systems. In other words, opal_path_nfs() might continue to always return false on BSD systems and I'd not know the difference.
>
> -Paul
>
> P.S. the commit message says "modern flavors of *BSD OSs no longer define __BSD", but the FreeBSD-6.3 (circa 2008) system I also test doesn't define __BSD either. So, I wonder if this code ever did worked as intended on the BSD systems.
>
>
> On Thu, Jan 9, 2014 at 1:30 PM, Jeff Squyres (jsquyres) <jsquyres_at_[hidden]> wrote:
> Fixed on trunk in https://svn.open-mpi.org/trac/ompi/changeset/30198.
>
> I can't test on all the kinds of systems Paul/Marco have, though -- we'll have to see what happens when he tries.
>
>
> On Jan 9, 2014, at 10:36 AM, Ralph Castain <rhc_at_[hidden]> wrote:
>
> > I fully concur - just limited by my available time to fix it. Jeff has volunteered to step in, though.
> >
> > On Jan 8, 2014, at 11:44 PM, marco atzeri <marco.atzeri_at_[hidden]> wrote:
> >
> >> Il 1/9/2014 5:10 AM, Ralph Castain ha scritto:
> >>> Actually, as I look at it, the logic escapes me anyway. Basically, you
> >>> only have two options - use the vfs struct for Sun, and use fs struct
> >>> for everything else. I'm not aware of any other choice, and indeed the
> >>> list of all the systems for the latter actually is intended to amount to
> >>> "anything else".
> >>>
> >>> So I just changed it to an "else" statement in the trunk and scheduled
> >>> it for 1.7.4 if it passes muster - see how this works for you.
> >>>
> >>> Ralph
> >>>
> >>
> >> Ralph,
> >> please note that there are other similar cases in the same file
> >>
> >> in "bool opal_path_nfs" function at row 434 and 462
> >>
> >> the one at 489 is a multiple if with no default case,
> >> so the code will fail to perform for any architecture
> >> no reported there, like CYGWIN, and it is very hard to notice
> >>
> >> In general this type of "ifdefined" around platform
> >> are very bad for portability or platform evolution.
> >> Adding a new platform will be a hell of work.
> >>
> >> The Autoconf approach to portability "should be" to test
> >> for features, not for versions or platform.
> >>
> >> Regards
> >> Marco
> >>
> >> _______________________________________________
> >> devel mailing list
> >> devel_at_[hidden]
> >> http://www.open-mpi.org/mailman/listinfo.cgi/devel
> >
> > _______________________________________________
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>
>
> --
> Jeff Squyres
> jsquyres_at_[hidden]
> For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
>
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>
>
> --
> Paul H. Hargrove PHHargrove_at_[hidden]
> Future Technologies Group
> Computer and Data Sciences Department Tel: +1-510-495-2352
> Lawrence Berkeley National Laboratory Fax: +1-510-486-6900
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