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Subject: Re: [OMPI devel] RFC: mpirun command line arugments
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2011-04-21 20:44:50

On Apr 21, 2011, at 8:21 PM, Paul H. Hargrove wrote:

> I saw the "extra bonus points" proposal for svn-style "mpirun help command", and I interpreted it to be slightly different from what I had in mind. What I indented by my suggestion was regrouping the existing 200+ line alphabetical-by-option-name output into from 5 to 10 topic sections - relatively minor "editorial" work (not that I am volunteering) when compared to writing new documentation.

Ah, I gotcha.

I understand you now, but I still classify it as "I'd love to see someone's patch for it." :-)

> Oh, one more related thing. At least in 1.4.2 the --help output goes to stderr rather than stdout. The gnu utilities all send their --help output to stdout. This may seem like a extremely minor point to the folks on this list, but you would be surprised how many end-users don't know how to redirect stderr to a pipe (that is to say "mpirun --help | less" doesn't do what the user wants). Perhaps that is already fixed in 1.5.x?

Nope, it's not. But that's a good reason to change it (GNU apps send to stdout). I'll take that as a friendly amendment to my proposal.

Jeff Squyres
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