[MacPorts] #58882: Python37 configure script segfaults in generate-posix-vars on macOS 10.15

[MacPorts]

#58882: Python37 configure script segfaults in generate-posix-vars on macOS 10.15
-----------------------+----------------------
  Reporter:  vdoublie  |      Owner:  jmroot
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  catalina
      Port:  python37  |
-----------------------+----------------------

Comment (by josh-blake):

 Python will build if you use the Xcode 10.3 toolchain - either select 10.3
 (10G8) from within Xcode, or point appropriately using
 {{{
 xcode-select -s /Applications/Xcode.app/Contents/Developer
 }}}
 from the command line. You would also be wise to run a
 {{{
 sudo port select clang none
 sudo port select llvm none
 }}}
 just to force macports to use Apples toolchain.

-- 
Ticket URL: <https://trac.macports.org/ticket/58882#comment:8>
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