[MacPorts] #61636: gcc-devel: install on ARM64

[MacPorts]

#61636: gcc-devel: install on ARM64
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  Reporter:  jpanetta   |      Owner:  NicosPavlov
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.6.4
Resolution:             |   Keywords:  arm64
      Port:  gcc-devel  |
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Comment (by kencu):

 Julian, request is to just switch gcc-devel to the github branch totally
 and add your depend_build-append.

 Chris: Yep, I know :)

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Ticket URL: <https://trac.macports.org/ticket/61636#comment:40>
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