[MacPorts] #62474: tensorflow build fails on 10.15

[MacPorts]

#62474: tensorflow build fails on 10.15
----------------------------+--------------------
  Reporter:  essandess      |      Owner:  (none)
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.6.4
Resolution:                 |   Keywords:
      Port:  py-tensorflow  |
----------------------------+--------------------

Comment (by cjones051073):

 {{{
 :debug:extract
 SDKROOT='/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk'
 }}}

 does the above exist or not ?

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Ticket URL: <https://trac.macports.org/ticket/62474#comment:2>
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