[MacPorts] #64562: "libgcc9 cannot be built while libunwind-headers is active." when migrating from Big Sur to Monterey

[MacPorts]

#64562: "libgcc9 cannot be built while libunwind-headers is active." when migrating
from Big Sur to Monterey
-------------------------+--------------------
  Reporter:  MarkCallow  |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.7.1
Resolution:              |   Keywords:
      Port:              |
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Comment (by kencu):

 the libunwind-headers are needed only to build cctools.

 After cctools is installed, libunwind-headers must be deactivated to
 install any of the newer gcc or libgcc versions.

 the restore ports script knows nothing of this issue.

 so you might need to do those manually, perhaps, if you’re in some kind of
 loop.

 I can’t think of a way for the script to manage that nuance automatically,
 but perhaps you or someone else might.

-- 
Ticket URL: <https://trac.macports.org/ticket/64562#comment:5>
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