[MacPorts] #62878: openmpi: fix builds for MacOS 10.8 and earlier, by disabling use of AVX instruction set; mark known_fail, for cases not easily fixable (was: openmpi: mark subports as known_fail on appropriate OS versions)

[MacPorts]

#62878: openmpi: fix builds for MacOS 10.8 and earlier, by disabling use of AVX
instruction set; mark known_fail, for cases not easily fixable
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  Reporter:  jmroot   |      Owner:  mascguy
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  openmpi  |
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Comment (by mascguy):

 Agreed, we should block builds which fail, where there's no easy fix. Most
 of the failures, though, relate to the use of the Intel AVX instruction
 set. And that's easily disabled for those older MacOS releases.

 That's something I'll take care of ASAP.

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Ticket URL: <https://trac.macports.org/ticket/62878#comment:1>
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