[MacPorts] #29749: libdevil 1.7.8_2 refers to deprecated and removed function in libpng

[MacPorts]

#29749: libdevil 1.7.8_2 refers to deprecated and removed function in libpng
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 Reporter:  daftalx@…          |       Owner:  macports-tickets@…                   
     Type:  defect             |      Status:  new                                  
 Priority:  Normal             |   Milestone:                                       
Component:  ports              |     Version:  1.9.2                                
 Keywords:                     |        Port:                                       
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 while running a code dependent on libdevil, I get:
 {{{
 15:39:49: Error: dlopen(/opt/local/lib/libunitsync.so, 2): Symbol not
 found: _png_set_gray_1_2_4_to_8
   Referenced from: /opt/local/lib/libIL.1.dylib
   Expected in: flat namespace
 in /opt/local/lib/libIL.1.dylib
 }}}
 Further reading got me to: "png_set_gray_1_2_4_to_8" was deprecated and
 REMOVED in libpng 1.4 and replaced with "png_set_expand_gray_1_2_4_to_8".
 MacPorts has libpng 1.4.7.

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Ticket URL: <https://trac.macports.org/ticket/29749>
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