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Subject: Re: [OMPI devel] [devel-core] OMPI MCA components - track external libs versions
From: Mike Dubman (miked_at_[hidden])
Date: 2014-04-14 16:12:56


sorry, it is always 1:0:0 for all releases and not 0:0:0 as I mentioned.
but still - it is always 1:0:0.
agree that it is bad and ambiguous.

The ofa claims that ABI does not change at all and verbs.h API/ABI is
exactly as in spec for all toolkit generations.
The non-spec experimental verbs infra availability can be tested with
autotools macros.

On Mon, Apr 14, 2014 at 10:43 PM, Jeff Squyres (jsquyres) <
jsquyres_at_[hidden]> wrote:

> On Apr 14, 2014, at 3:27 PM, Mike Dubman <miked_at_[hidden]> wrote:
>
> > this was true if all external libraries were maintaining ABI
> compatibility indicator properly with libtool.
> > Let`s check your favorite, libibverbs :), the version is always 0.0.0 in
> libibverbs.so.0.0.0 so openib btl will not fail on link.
>
> ?
>
> -----
> ❯❯❯ ls -l /usr/lib/libibverbs*
> lrwxrwxrwx 1 root root 19 Dec 16 06:59 /usr/lib/libibverbs.so ->
> libibverbs.so.1.0.0*
> lrwxrwxrwx 1 root root 19 Dec 16 06:59 /usr/lib/libibverbs.so.1 ->
> libibverbs.so.1.0.0*
> -rwxr-xr-x 1 root root 52060 Dec 3 11:43 /usr/lib/libibverbs.so.1.0.0*
> -----
>
> As you can see, my libibverbs has shared library version 1.0.0, not 0.0.0.
>
> > The libibverbs can have experimental verbs included but libibverbs
> version still will be indicating the libtool version is "0:0:0".
>
> That's bad software release methodology. You should fix *that*.
>
> Shared libraries have version numbers for a reason. They should be used
> properly.
>
> > So, the only way for sysadmin/user to know if he has a right version of
> libibvers installed is to check verbs.getVersion() and see if it is matches
> to one which includes experimental verbs and then he will know that there
> is a problem.
> >
> > but for us, the most powerful case is the one that you described:
> compare ompi_info output on head and compute node and warn user if differ.
> >
> > Also, to provide an infrastructure to digitize release notes.
>
> Sure -- registering an MCA param like I described does all of these things
> without needing any new infrastructure in OMPI. You could put such version
> numbers in today.
>
> --
> 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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