[MacPorts] #68414: emacs-app @ 29.1_2 fails - error: incomplete definition of type 'struct dynarray_header'

[MacPorts]

#68414: emacs-app @ 29.1_2 fails - error: incomplete definition of type 'struct
dynarray_header'
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  Reporter:  ekinakoglu               |      Owner:  (none)
      Type:  defect                   |     Status:  new
  Priority:  Normal                   |  Milestone:
 Component:  ports                    |    Version:
Resolution:                           |   Keywords:
      Port:  emacs-app emacs-mac-app  |
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Comment (by cooljeanius):

 I've seen this error on Big Sur and found that trace mode works around it
 there, at least partially, as the build will then proceed a little
 further, and then need to be continued with trace mode turned off again,
 which allows it to proceed a little further, before it can finally be
 finished with trace mode turned on again

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Ticket URL: <https://trac.macports.org/ticket/68414#comment:4>
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