[MacPorts] #57418: This is NOT duplicate! Could not port graphviz-oldgui

[MacPorts]

#57418: This is NOT duplicate! Could not port graphviz-oldgui
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 Reporter:  zhusichen320   |      Owner:  (none)
     Type:  defect         |     Status:  new
 Priority:  Normal         |  Milestone:
Component:  ports          |    Version:  2.5.4
 Keywords:  Port Graphviz  |       Port:  graphviz-oldgui
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 THIS IS NOT A DUPLICATE! SORRY FOR THAT!

 My MacOs's version is 10.12 (NOT 10.13 as I mentioned previously, sorry
 about that), so I couldn't download and use the latest version of Xcode.
 Instead, I downloaded Xcode 9.2 and the corresponding command line tool
 and macports. Although I could successfully port graphviz, I failed to
 port gui. I did NOT find graphviz-gui under source files, so I tried to
 port graphviz-oldgui, which is under the source file. However, when I
 ported oldgui, the ouput says "graphviz-oldgui cannot be installed for the
 configured build_arch 'x86_64' because it only supports the arch(s)
 'ppc'."

 It seems that it's a problem of my MacOS's old version, but how to fix
 that? I really want the Graphviz.app.

 Thank you for considering my situation and questions!

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Ticket URL: <https://trac.macports.org/ticket/57418>
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