[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

[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):

 Sadly, it looks like the subports for gcc9 and later are failing, on MacOS
 10.7 and earlier. The AVX instruction use issue is resolved, but now other
 Intel extensions are being balked at.

 It might be possible to fix this - maybe - but it's probably easier to
 simply set those to known_fail. Users still have options like gcc7 and
 clang90, among others, which do work with those older MacOS releases.

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Ticket URL: <https://trac.macports.org/ticket/62878#comment:6>
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