[MacPorts] #15558: Provide quartz-only variant of cairo port

[MacPorts]

#15558: Provide quartz-only variant of cairo port
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 Reporter:  macports at flyn.org  |       Owner:  macports-tickets at lists.macosforge.org
     Type:  enhancement        |      Status:  new                                  
 Priority:  Low                |   Milestone:  Port Enhancements                    
Component:  ports              |     Version:  1.6.0                                
 Keywords:                     |  
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 The cairo port currently provides three variants: universal, which builds
 all of cairo's backends (e.g., freetype and quartz on Mac OS X); glitz,
 which (in addition) enables glitz and no_x11, which disables X11
 functionality.

 I would like to see a pure quartz variant. It is desirable to have only
 one font subsystem (quartz). This is not yet generally feasible because
 many applications do not support the quartz back-end. However, a pure
 quartz variant would allow developers to easily build an environment from
 which they could continue to port applications to support the quartz back-
 end. Broken, for lack of a better word, applications would immediately
 reveal themselves as they would not build and/or execute.

 If a user is only interested in a subset of applications that do support
 the quartz back-end, then he may install them without many unnecessary
 dependencies.

 Of course, the universal build should remain the default for quite some
 time (if not forever).

 This was discussed in ticket #15052. I opened a separate ticket so that it
 may be tracked.

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Ticket URL: <http://trac.macports.org/ticket/15558>
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