On Feb 2, 2011, at 1:44 PM, Jeffrey A Cummings wrote:

> I've encountered a supposed OpenMPI version of 1.4-4.  Is the hyphen a typo 
> or is this syntax correct and if so what does it mean? 

Is this an RPM version number?  It's fairly common for RPMs to add "-X" at the 
end of the version number.  The "X" indicates the RPM version number (i.e., the 
version number of the packaging -- not the package itself).

Open MPI's version number scheme is explained here:

    http://www.open-mpi.org/software/ompi/versions/

-- 
Jeff Squyres
jsquy...@cisco.com
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