[MacPorts] #69812: /usr/bin/clang++ cannot compile anything when trying to compile as x86_64 on a current arm system against the MacOSX10.13.sdk (but macports-clang does work)

[MacPorts]

#69812: /usr/bin/clang++ cannot compile anything when trying to compile as x86_64
on a current arm system against the MacOSX10.13.sdk (but macports-clang
does work)
---------------------+--------------------
  Reporter:  lukaso  |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:          |
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Comment (by lukaso):

 > That is -- not terribly hard to do. You can set up custom compilers in
 macports.conf. But OOTH, it's an extra step too, and you need to keep your
 wits about you.

 I can't find any documentation on how to set `compiler.blacklist` or a
 default compiler in `macports.conf`. (`cmake-bootstrap` isn't the only
 port that is breaking on 10.13 SDK). How is this done?

-- 
Ticket URL: <https://trac.macports.org/ticket/69812#comment:32>
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