[MacPorts] #62345: Error installing py39-matplotlib or one of its dependencies (possibly qhull) on new machine

[MacPorts]

#62345: Error installing py39-matplotlib or one of its dependencies (possibly
qhull) on new machine
--------------------------------------------+----------------------
  Reporter:  nathanielvirgo                 |      Owner:  (none)
      Type:  defect                         |     Status:  new
  Priority:  Normal                         |  Milestone:
 Component:  ports                          |    Version:  2.6.4
Resolution:                                 |   Keywords:  catalina
      Port:  qhull, maybe - it's not clear  |
--------------------------------------------+----------------------

Comment (by nathanielvirgo):

 I have made some progress on this, and managed to get the port to install.

 I think there is still a bug here, which is that the relevant error
 message was never displayed when trying to install `py39-matplotlib`
 directly, rather than installing Python by itself first. I will edit the
 issue to make clear that this was the problem.

 When I ran

 {{{
 % sudo port install python39
 }}}

 I was given the following error message:

 {{{
 % sudo port install python39
 Password:
 Error: It seems you have not accepted the Xcode license; most ports will
 fail to build.
 Error: Agree to the license by opening Xcode or running `sudo xcodebuild
 -license'.
 Error: Follow https://guide.macports.org/#project.tickets to report a bug.
 Error: Processing of port python39 failed
 }}}

 After running `sudo xcodebuild -license`, everything worked fine. (I
 installed `python39` first, and then `py39-matplotlib` after that.) The
 only problem is that I was not prompted to agree to the license when
 trying to install `py39-matplotlib` directly, rather than `python39`.

-- 
Ticket URL: <https://trac.macports.org/ticket/62345#comment:2>
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