[MacPorts] #25164: alpine doesn't take build_arch into account

[MacPorts]

#25164: alpine doesn't take build_arch into account
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 Reporter:  ryandesign@…             |       Owner:  todmorrison@…        
     Type:  defect                   |      Status:  new                  
 Priority:  Normal                   |   Milestone:                       
Component:  ports                    |     Version:  1.8.2                
 Keywords:                           |        Port:  alpine               
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 On a 64-bit Mac running Snow Leopard, if I set build_arch to i386 in
 macports.conf, it doesn't build. See attached log.

 A similar fix to the one you made for the universal variant may be needed
 to support build_arch. The variables to use would be
 ${configure.cc_archflags} and (as of MacPorts 1.9.0)
 ${configure.ld_archflags}.

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Ticket URL: <http://trac.macports.org/ticket/25164>
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