[MacPorts] #63402: ccache @ 4.4_0 error: static_assert failed "unique_ptr constructed with null function pointer deleter"

[MacPorts]

#63402: ccache @ 4.4_0 error: static_assert failed "unique_ptr constructed with
null function pointer deleter"
-----------------------+---------------------------------
  Reporter:  thetrial  |      Owner:  ryandesign
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.7.1
Resolution:            |   Keywords:  elcapitan legacy-os
      Port:  ccache    |
-----------------------+---------------------------------

Comment (by thetrial):

 I’ll try. I’m not sure if clang-9.0 wasn’t even installed before. The
 command {{{sudo port -v -N install clang-9.0}}} hardly triggered
 something. Now I wait for the result of the latter.

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Ticket URL: <https://trac.macports.org/ticket/63402#comment:5>
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