[MacPorts] #22148: fix gcc43 darwin10 build and add i386 multilib using backports from gcc 4.4

[MacPorts]

#22148: fix gcc43 darwin10 build and add i386 multilib using backports from gcc 4.4
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 Reporter:  howarth@…                 |       Owner:  mww@…           
     Type:  defect                    |      Status:  new             
 Priority:  Normal                    |   Milestone:                  
Component:  ports                     |     Version:  1.8.1           
 Keywords:  lang                      |        Port:  gcc43           
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Comment(by jmr@…):

 Applied in r69846, but building with multilib still doesn't work.
 CC=build/i386/./prev-gcc/xgcc is used when configuring in build/i386/zlib,
 but that path doesn't exist.

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Ticket URL: <http://trac.macports.org/ticket/22148#comment:8>
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