[MacPorts] #18906: qtiplot build fails

[MacPorts]

#18906: qtiplot build fails
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  Reporter:  jwhowse4@…            |       Owner:  jonas@…           
      Type:  defect                |      Status:  closed            
  Priority:  Normal                |   Milestone:  Port Bugs         
 Component:  ports                 |     Version:  1.7.0             
Resolution:  fixed                 |    Keywords:                    
      Port:  qtiplot               |  
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Comment(by jonas@…):

 I haven't closed this ticket yet, because the png linking issue ist not
 solved... It had become a bit confusing but this ticket deals with three
 issues:
  * usage of wrong headers if the qwt port was installed (solved with
 qtiplot-0.9.7.6 by using external qwt52)
  * usage of system python instead of macport's python (solved by the usage
 of `python_select`)
  * missing `-lpng` linker switch for ''some'' people (see [#comment:12]).
 I've just committed r50094 as a potential fix.

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Ticket URL: <http://trac.macports.org/ticket/18906#comment:16>
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