[MacPorts] #55872: gcc7 @7.3.0: Selftests fail with "Illegal instruction: 4"

[MacPorts]

#55872: gcc7 @7.3.0: Selftests fail with "Illegal instruction: 4"
-----------------------+---------------------------
  Reporter:  chucko58  |      Owner:
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.4.2
Resolution:            |   Keywords:  sierra x86_64
      Port:  gcc7      |
-----------------------+---------------------------
Changes (by chucko58):

 * Attachment "mp_gcc7_main.log.gz" added.

 Gzipped log of the gcc7 build, with tracing enabled.

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Ticket URL: <https://trac.macports.org/ticket/55872>
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