[MacPorts] #36176: plplot upgrade to rev 3 fails, claims clang not installed

[MacPorts]

#36176: plplot upgrade to rev 3 fails, claims clang not installed
------------------------------+--------------------------------
 Reporter:  david.w.watson@…  |      Owner:  macports-tickets@…
     Type:  defect            |     Status:  new
 Priority:  Normal            |  Milestone:
Component:  ports             |    Version:  2.1.2
 Keywords:                    |       Port:  plplot
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 plplot upgrade to rev 3 fails, claims clang not installed, but doesn't
 claim clang as dependency.

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Ticket URL: <https://trac.macports.org/ticket/36176>
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