[MacPorts] #58439: GCC 9 and 10 depend on MacPorts Clang

[MacPorts]

#58439: GCC 9 and 10 depend on MacPorts Clang
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  Reporter:  MarcusCalhoun-Lopez  |      Owner:  (none)
      Type:  defect               |     Status:  new
  Priority:  Normal               |  Milestone:
 Component:  ports                |    Version:
Resolution:                       |   Keywords:
      Port:  gcc9 gcc10           |
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Comment (by cjones051073):

 One thing I really did nit like much about those lines I added to the gcc
 port was the need to minor the same logic in terms of the clang versions
 as used in the cctools port. It would not remove the dependency of gcc9 on
 a mp clang, but if we could reduce those options that would be good. Would
 it be possible, for each, to just use clang 7 ( or perhaps 8 now) across
 the board there ?

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Ticket URL: <https://trac.macports.org/ticket/58439#comment:6>
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