[MacPorts] #63016: libgcc9 @9.4.0: Error: No files have been installed in the destroot directory!

[MacPorts]

#63016: libgcc9 @9.4.0: Error: No files have been installed in the destroot
directory!
----------------------+--------------------
  Reporter:  RobK88   |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.7.1
Resolution:           |   Keywords:  lion
      Port:  libgcc9  |
----------------------+--------------------

Comment (by RobK88):

 I do not think it is a dup of 63108.  I can build libgcc9 on my Mac
 running 10.7.5.  But I cannot install the files into destroot.

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Ticket URL: <https://trac.macports.org/ticket/63016#comment:4>
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