[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 MarkCallow):

 > It was there. I removed it but I still get the same number of these
 errors.

 Correction. If I do

 {{{
 sudo port sync
 sudo port -f deactivate libunwind-headers
 sudo port clean libgcc9
 }}}

 after removing `libunwind_headers` from `myports.txt` then I do not get
 the unwind related errors. Instead every attempt to install `libgcc9`
 fails when trying to link gencondmd.o with a bunch of "undefined symbols
 for architecture x86_64".

 @kencu I don't have any of the items you listed but I will try installing
 cctools manually, removing it from myports.txt. I suspect it won't make
 any difference though.

-- 
Ticket URL: <https://trac.macports.org/ticket/64562#comment:8>
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