[MacPorts] #60853: port mysql8 @8.0.21 fails to build on less than macOS 10.12 due to system libc++ being too old

[MacPorts]

#60853: port mysql8 @8.0.21 fails to build on less than macOS 10.12 due to system
libc++ being too old
----------------------------+-------------------------
  Reporter:  wadjei         |      Owner:  herbygillot
      Type:  defect         |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.6.2
Resolution:                 |   Keywords:  mavericks
      Port:  mysql8 libcxx  |
----------------------------+-------------------------

Comment (by kencu):

 And yes, they maybe should just dump MacOSX and install Ubuntu 20.04
 instead -- but having done that on a number of systems now, that is 1000
 hours worth of setup for most people, when you actually get into doing it,
 working through all the glitches, figuring out UFW, and the cryptic ways
 of Linux -- which sure everyone should learn, maybe -- but just aren't
 going to.

-- 
Ticket URL: <https://trac.macports.org/ticket/60853#comment:13>
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