[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 jmroot):

 I can understand the clang dependency on 10.6 and older because without it
 gcc has no reasonable assembler to use. On newer OS versions it's less
 necessary but may still be needed to allow using certain newer
 instructions. And yes, you are correct that there's no real guarantee that
 gcc is depending on the clang version that cctools will try to use. Maybe
 we need clang variants for gcc (argh) with the default changing based on
 the installed cctools variant? Or maybe the solution is to only offer one
 configuration of cctools on each OS version.

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Ticket URL: <https://trac.macports.org/ticket/58439#comment:3>
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