[MacPorts] #13813: graphviz-2.16.1 requires Tk version 8.4 ; ports installs Tk 8.5

[MacPorts]

#13813: graphviz-2.16.1 requires Tk version 8.4 ; ports installs Tk 8.5
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  Reporter:  dan-macosforge.org at unpossible.com  |       Owner:  ryandesign at macports.org
      Type:  defect                             |      Status:  new                    
  Priority:  Normal                             |   Milestone:  Port Bugs              
 Component:  ports                              |     Version:  1.6.0                  
Resolution:                                     |    Keywords:  graphviz tk            
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Comment (by ryandesign at macports.org):

 r32981 turns off all language bindings by default, so now graphviz will
 build (without tcl/tk support) even if tcl and tk 8.5 are installed.

 graphviz +tcl will work with tcl 8.5. It will not work if tk 8.5 is also
 installed. graphviz apparently uses tk if present. I don't know if there's
 a configure switch to tell it to stop doing that. This will probably
 resolve itself once graphviz 2.18 is released with support for tk 8.5.

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Ticket URL: <http://trac.macosforge.org/projects/macports/ticket/13813#comment:2>
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