I’m afraid that won’t solve the problem - the distro will still feel the need 
to release -two- versions of OMPI, one with PSM and one with PSM2. Ordinarily, 
I wouldn’t care - but this creates user confusion and reflects on us as a 
community.


> On Sep 2, 2015, at 6:50 PM, Gilles Gouaillardet <gil...@rist.or.jp> wrote:
> 
> Ralph,
> 
> what about automatically *not* building PSM2 if PSM is built and PSM2 is not 
> explicitly required ?
> /* in order to be future proof, we could even do that only if we detect a 
> symbol conflict */
> we could abort if ompi is configure'd with both --with-psm and --with-psm2, 
> or simply do nothing
> (the end user might know what he/she is doing, and there will be nothing to 
> do on the ompi side
> when this gets fixed by the PSM folks)
> 
> Cheers,
> 
> Gilles
> 
> On 9/3/2015 10:21 AM, Ralph Castain wrote:
>> Hi folks
>> 
>> I regret to say that 1.10.0 is hitting an issue with at least one upstream 
>> distro. Apparently, there is a symbol conflict between the PSM and PSM2 
>> libraries that precludes building both of those MTLs at the same time. This 
>> is leading the distro to push for release of two OMPI 1.10.0 builds - one 
>> with PSM and the other with PSM2.
>> 
>> IMO, this is a very undesirable situation. I agree with the distro that 
>> delaying release for some significant time as this would impact everyone 
>> else’s users. Therefore, assuming that the PSM team is unable to quickly 
>> resolve the problem in their libraries, my inclination is to release an 
>> immediate 1.10.1 with the PSM2 MTL removed.
>> 
>> I’m soliciting input - any opinions?
>> Ralph
>> 
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