[MacPorts] #65861: graphviz: build fails for macOS 10.6 (was: Can't be build on macOS 10.6)

[MacPorts]

#65861: graphviz: build fails for macOS 10.6
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  Reporter:  catap     |      Owner:  mascguy
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  graphviz  |
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Comment (by mascguy):

 Yes, I still need to fix this. To work around it, force the compiler to
 MacPorts Clang 9.0. (Presently, Clang 11 and later fail, so don't use
 those.)

 {{{
 $ sudo port install graphviz configure.compiler=macports-clang-9.0
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/65861#comment:2>
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