[MacPorts] #15298: gtk-engines2 doesn't configure against 'gtk2 +quartz'

[MacPorts]

#15298: gtk-engines2 doesn't configure against 'gtk2 +quartz'
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 Reporter:  mp at dpj.sent.com  |       Owner:  macports-tickets at lists.macosforge.org
     Type:  defect           |      Status:  new                                  
 Priority:  Normal           |   Milestone:  Port Enhancements                    
Component:  ports            |     Version:  1.6.0                                
 Keywords:                   |  
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 The gtk-engines2 Portfile appends '-lgdk-x11-2.0' to LDFLAGS, but this
 library is not installed if gtk2 was installed with +quartz variant.

 I recommend that gtk-engines2 uses a 'quartz' variant to change
 '-lgdk-x11-2.0' to '-lgdk-quartz-2.0'

 I'll attach a Portfile diff that works for me, although I'm not sure if
 it's style is acceptable.

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Ticket URL: <http://trac.macports.org/ticket/15298>
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