[MacPorts] #33395: qt4-mac @4.7.4_1+quartz libpng error

[MacPorts]

#33395: qt4-mac @4.7.4_1+quartz libpng error
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 Reporter:  pcrackenberg@…              |       Owner:  macports-tickets@…                   
     Type:  defect                      |      Status:  new                                  
 Priority:  Normal                      |   Milestone:                                       
Component:  ports                       |     Version:  2.0.3                                
 Keywords:                              |        Port:                                       
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 I got a libpng error, as mentioned on the FAQ here:
 https://trac.macports.org/wiki/ProblemHotlist#libpng

 This was the following error I got after installing py27-pyqt4 and the
 required dependencies:

 {{{
 Traceback (most recent call last):
   File "QtEvent.pyw", line 15, in <module>
     from PyQt4.QtGui import *
 ImportError:
 dlopen(/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7
 /site-packages/PyQt4/QtGui.so, 2): Library not loaded:
 /opt/local/lib/libpng12.0.dylib
   Referenced from: /opt/local/lib/libQtGui.4.dylib
   Reason: image not found
 }}}

 Forcing an upgrade (as stated in the FAQ) for py27-pyqt4, python27, and
 libpng didn't work, however forcing an upgrade for qt4-mac fixed the
 problem.

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Ticket URL: <https://trac.macports.org/ticket/33395>
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