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Subject: Re: [OMPI devel] OpenIB compile error
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2012-06-23 06:32:15

On Jun 22, 2012, at 11:26 PM, TERRY DONTJE wrote:

>> 4. The behavior of --with[out]-verbs is as was described in a prior mail:
>> - if --with-verbs is specified, all 3 verbs-based components must succeed
>> - if --without-verbs is specified, all 4 verbs-based components will not build
>> - if --with-verbs=DIR is specified, all 3 verbs-based components must succeed and will use DIR to find verbs headers and libraries
> What does it mean that "all 3 verbs-based components must succeed"?
> Does that mean you cannot specify --with-verbs=DIR --with-openib --without-ofud?

Yes. --with/without-ofud never worked, anyway (i.e., there was no code that implemented it). Ditto that there was no --with/without-ud.

> Does it mean that if you specify --with-verbs=DIR and some other dependency is not found for openib btl that the configure fails?

Yes. Same was true for --with-openib=DIR.

> What is the 4th verbs-based component this is not built when one specifies --without-verbs.

There isn't one.

You're probably thinking of hwloc; hwloc can *use* verbs, but it doesn't *require* verbs. The other 3 (OOB UD, BTL OFUD, BTL openib) all *require* verbs and cannot be built without it.

Jeff Squyres
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