[MacPorts] #57067: SIerra: issue with assembler "as" in conjunction with gfortran

[MacPorts]

#57067: SIerra: issue with assembler "as" in conjunction with gfortran
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  Reporter:  rjones-sandia  |      Owner:  (none)
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.5.3
Resolution:                 |   Keywords:
      Port:  gcc7           |
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Comment (by ryandesign):

 Replying to [comment:5 mf2k]:
 > The {{{+xcode}}} variant is now the default. Using {{{+llvm50}}} is
 known to cause problems.

 That is only true when Xcode 9 or later is installed. The user hasn't yet
 told us what version of Xcode they use.

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Ticket URL: <https://trac.macports.org/ticket/57067#comment:6>
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