[MacPorts] #62423: graphviz 2.40: libtool: compile: unable to infer tagged configuration

[MacPorts]

#62423: graphviz 2.40: libtool: compile: unable to infer tagged configuration
---------------------------+------------------------
  Reporter:  TonyCrawford  |      Owner:  ryandesign
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.6.4
Resolution:                |   Keywords:
      Port:  graphviz      |
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Comment (by cjones051073):

 works fine if you force use of macports clang 9.0

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

 so adding a compiler blacklist to enforce this for the old OSes that are
 affected is an option to fix this.

-- 
Ticket URL: <https://trac.macports.org/ticket/62423#comment:2>
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