[MacPorts] #20739: Allow ports to indicate supported architectures

[MacPorts]

#20739: Allow ports to indicate supported architectures
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 Reporter:  ryandesign@…             |       Owner:  macports-tickets@…                   
     Type:  enhancement              |      Status:  new                                  
 Priority:  Normal                   |   Milestone:  MacPorts Future                      
Component:  base                     |     Version:  1.7.1                                
 Keywords:                           |        Port:                                       
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Comment(by njbutko@…):

 As a MacPorts user (not developer), I think this is critical. It would
 have headed off the majority of these Snow Leopard issues before they even
 started.

 By default, I would like to see all dependencies built universally with
 the maximum amount of available architectures (including arm6/arm7 if
 applicable). This would allow for maximum flexibility -- if I want to
 install OpenCV, which links to Carbon and old Quicktime libraries and must
 be built in 32-bit mode, I still want the dependency libpng to be
 installed in the most flexible way. That way, later if I want to develop
 an iphone program that links to graphviz, which links to libpng, I'll be
 all set.

 It's really unfortunate that "port install foo" tries to only compile the
 default system architecture, and not something appropriate for foo.

-- 
Ticket URL: <http://trac.macports.org/ticket/20739#comment:3>
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