[MacPorts] #29348: pngpp @0.2.3_1 fail to build other software with latest version libpng @1.4.7

[MacPorts]

#29348: pngpp @0.2.3_1 fail to build other software with latest version libpng
@1.4.7
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 Reporter:  macports@…                |       Owner:  macports-tickets@…                   
     Type:  defect                    |      Status:  new                                  
 Priority:  Normal                    |   Milestone:                                       
Component:  ports                     |     Version:  1.9.2                                
 Keywords:                            |        Port:                                       
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 By including <png++/png.hpp> of package pngpp in a C++ file, the build
 fails as it depends on an older version of libpng. With libpng @1.2.44 it
 works fine, I have not tested if this may be caused by the recent upgrade
 of pngpp from @1.4.5 to @1.4.7.

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Ticket URL: <https://trac.macports.org/ticket/29348>
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