[MacPorts] #61949: graphviz fails to build on Catalina

[MacPorts]

#61949: graphviz fails to build on Catalina
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 Reporter:  cwgamma  |      Owner:  (none)
     Type:  defect   |     Status:  new
 Priority:  High     |  Milestone:
Component:  ports    |    Version:
 Keywords:           |       Port:
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 graphviz fails to build on Catalina 10.15.7
 From the log file there are numerous errors like this:

 /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/__bit_reference:786:43:
 error: no member named 'min' in namespace 'std::__1'
 :info:build             __storage_type __ddn =
 _VSTD::min<__storage_type>(__dn, __clz_r);
 :info:build                                    ~~~~~~~^
                               ~~~~~~~^

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Ticket URL: <https://trac.macports.org/ticket/61949>
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