[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:  High        |  Milestone:
Component:  ports       |    Version:  2.7.1
 Keywords:              |       Port:
------------------------+--------------------
 I am trying to migrate my ports from Big Sur to Monterey. I'm exactly
 following the migration guide. While running `restore_ports.tcl` I get
 many instances of the subject error. The complete message is:


 {{{
 Error: libgcc9 cannot be built while libunwind-headers is active.
 Error: Please forcibly deactivate libunwind-headers, e.g. by running:
 Error:
 Error:     sudo port -f deactivate libunwind-headers
 Error:
 Error: Then try again. You can reactivate libunwind-headers again later.
 Error: Failed to configure libgcc9: libunwind-headers is active
 Error: See
 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc9/libgcc9/main.log
 for details.
 }}}


 I tried `sudo port -f deactivate libunwind-headers` as suggested but the
 same thing happened next time I ran `restore_ports.tcl`. I then found
 [https://trac.macports.org/ticket/59344 closed ticket 59344]and following
 its suggestion I did sync and clean as well:

 {{{
 mark:~ $ sudo port sync
 Password:
 --->  Updating the ports tree
 mark:~ $ sudo port -f deactivate libunwind-headers
 --->  Deactivating libunwind-headers @5.0.1_0



 --->  Cleaning libunwind-headers
 mark:~ $ sudo port clean libgcc9
 --->  Cleaning libgcc9
 mark:~ $ sudo ./restore_ports.tcl myports.txt
 }}}

 But I still get the errors.

 How can I migrate the affected ports?

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