[MacPorts] #56938: gcc7 fortran fails simple tests

[MacPorts]

#56938: gcc7 fortran fails simple tests
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  Reporter:  ogourgue  |      Owner:  cjones051073
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.5.3
Resolution:            |   Keywords:
      Port:  gcc7      |
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Comment (by eborisch):

 The main difference between the logs (where things diverge) is that the
 new gfortran-mp-7 is adding {{{-mmacosx-version-min=10.13}}} to the call
 to the assembler, and leading to
 {{{FATAL:/opt/local/bin/../libexec/as/x86_64/as: I don't understand 'm'
 flag!}}}

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Ticket URL: <https://trac.macports.org/ticket/56938#comment:3>
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