[MacPorts] #68586: opam @2.1.5 fails to build on Sonoma: sed: opam.install: No such file or directory

[MacPorts]

#68586: opam @2.1.5 fails to build on Sonoma: sed: opam.install: No such file or
directory
---------------------------+----------------------
  Reporter:  barracuda156  |      Owner:  pmetzger
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.1
Resolution:                |   Keywords:  sonoma
      Port:  opam          |
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Comment (by barracuda156):

 Replying to [comment:3 pmetzger]:
 > (BTW, I have no PowerPC hardware nor has any been made by apple in a
 very long time. You can feel free to debug that if you like.)

 I solved the first error (it is the same as with Dune, so borrowing a fix
 from there works), but the got __Unwind_Resume undefined symbols. That
 often happens when C compiler is used to link a library instead of C++
 one. However, I could not easily find where it is even set in Makefiles.
 Do you have an idea?

 P. S. For Sonoma, I will clean everything and try again. But I installed
 everything default there. Puzzling.

-- 
Ticket URL: <https://trac.macports.org/ticket/68586#comment:4>
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