[MacPorts] #28327: boost does not follow build_arch

[MacPorts]

#28327: boost does not follow build_arch
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 Reporter:  andrebragareis@…          |       Owner:  macports-tickets@…                   
     Type:  defect                    |      Status:  new                                  
 Priority:  Normal                    |   Milestone:                                       
Component:  ports                     |     Version:  1.9.2                                
 Keywords:                            |        Port:  boost                                
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 I'm trying to build boost with 'build_arch i386' in my macports.conf, but
 the linker complains that it's trying to link x86_64 objects with the i386
 dependencies:

 {{{
 ld: warning: in /opt/local/lib/libbz2.dylib, file was built for i386 which
 is not the architecture being linked (x86_64)
 ld: warning: in /opt/local/lib/libz.dylib, file was built for i386 which
 is not the architecture being linked (x86_64)
 }}}

 My best guess is that boost is ignoring build_arch. This macports
 installation was deployed from the start with the i386 arch, and boost is
 the first package to exhibit this kind of problem.

 I'm attaching boost's build log in a bit.

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Ticket URL: <https://trac.macports.org/ticket/28327>
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