[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:              |
-------------------------+--------------------

Comment (by kencu):

 The restore ports script doesn't presently have the smarts to update your
 ports list to the current gcc versions.

 I suspect you will get what you want if everywhere in your saved ports
 list where you see gcc9/libgcc9, change it to gcc11/libgcc11, which is
 supported on your system.

 If you see any variants for your ports that have gcc9 in them, either
 delete that variant and see if it just works (best) or change it to gcc11
 instead if that won't work for that port (second best).

-- 
Ticket URL: <https://trac.macports.org/ticket/64562#comment:10>
MacPorts <https://www.macports.org/>
Ports system for macOS