[MacPorts] #59237: MacPorts fails to build on macOS Catalina

[MacPorts]

#59237: MacPorts fails to build on macOS Catalina
------------------------+--------------------
  Reporter:  smeingast  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  base       |    Version:  2.6.1
Resolution:             |   Keywords:
      Port:             |
------------------------+--------------------

Comment (by jmroot):

 {{{
 clang: error: unsupported option '-V -Wno-framework-include-private-from-
 public'
 }}}
 Looks like you are setting some unusual CFLAGS.

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Ticket URL: <https://trac.macports.org/ticket/59237#comment:3>
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