[MacPorts] #28008: gnuplot: library not found for -lpng12

[MacPorts]

#28008: gnuplot: library not found for -lpng12
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 Reporter:  macubergeek@…            |       Owner:  macports-tickets@…                   
     Type:  defect                   |      Status:  new                                  
 Priority:  Normal                   |   Milestone:                                       
Component:  ports                    |     Version:  1.9.2                                
 Keywords:  png                      |        Port:  gnuplot                              
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Comment(by ryandesign@…):

 Or perhaps, as reported in #27996, it's that gnuplot uses but does not
 declare a dependency on emacs, therefore MacPorts wouldn't know to upgrade
 emacs before gnuplot. Upgrade emacs first, then gnuplot.

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Ticket URL: <https://trac.macports.org/ticket/28008#comment:5>
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