[MacPorts] #61953: SDK version mismatch in gcc-devel

[MacPorts]

#61953: SDK version mismatch in gcc-devel
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  Reporter:  aivazis  |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:  sysroot macOS 11.0 11.1
      Port:           |
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Comment (by kencu):

 We have no good plan for this just yet.

 We have up until now tried to use an SDK that matches the system version
 we are building on, but that plan no longer seems viable.

 While we debate the alternative, you will have to rebuild gcc (and many
 other ports) from source to pick up the name of your current SDK.

 And whenever you upgrade your Xcode / CLTs, the same thing will happen.

 We **may** decide to bake in MacOSX.sdk instead of a system-specific sdk,
 but this is still under debate.

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Ticket URL: <https://trac.macports.org/ticket/61953#comment:1>
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