[MacPorts] #21026: libicns-0.7.0 Added support for OpenJPEG to Portfile

[MacPorts]

#21026: libicns-0.7.0 Added support for OpenJPEG to Portfile
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 Reporter:  verwymeren@…          |       Owner:  macports-tickets@…                   
     Type:  enhancement           |      Status:  new                                  
 Priority:  Normal                |   Milestone:                                       
Component:  ports                 |     Version:  1.8.0                                
 Keywords:                        |        Port:  libicns                              
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 By default libicns builds using Jasper to add support for extracting
 256x256 and 512x512 32-bit icons. Jasper frequently causes icns2png to
 generate errors when attempting to extract 256x256 and 512x512 icons.
 OpenJPEG appears to be more reliable so I suggest using it as the default
 library.

 Attached is a Portfile that uses OpenJPEG as the default library and adds
 a Jasper variant if building against Jasper is preferred.

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Ticket URL: <http://trac.macports.org/ticket/21026>
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