[MacPorts] #33085: boost: support building for a different SDK

[MacPorts]

#33085: boost: support building for a different SDK
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 Reporter:  ryandesign@…             |       Owner:  adfernandes@…           
     Type:  defect                   |      Status:  new                     
 Priority:  Normal                   |   Milestone:                          
Component:  ports                    |     Version:  2.0.3                   
 Keywords:  haspatch                 |        Port:  boost                   
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 This report came in via James Gregurich on the mailing list:

 > I have macosx_deployment_target set to 10.6. The boost port file does
 not add in the sdkroot as it should. TO fix, modify the last line in the
 post-configure function to add in the isysroot entry... [[br]]
 > [[br]]
 > fixed line:
 >
 {{{
 write_jam "using darwin : : ${filter}${configure.cxx} -isysroot
 ${configure.sdkroot} ;"
 }}}

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Ticket URL: <https://trac.macports.org/ticket/33085>
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