diff -ru boost_1_50_0_beta1.org/tools/build/v2/tools/msvc.jam boost_1_50_0_beta1/tools/build/v2/tools/msvc.jam
      
        
          
        
        
          
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            | 853 | 853 | # 'x86' when running 32-bit Windows, no matter which processor is | 
          
            | 854 | 854 | # used, and 'AMD64' on 64-bit windows on x86 (either AMD64 or EM64T) | 
          
            | 855 | 855 | # Windows. | 
        
        
          
            |  | 856 | # PROCESSOR_ARCHITEW6432 is set when running a 64-bit Windows, but | 
          
            |  | 857 | # the shell is 32-bit. | 
        
        
          
            | 856 | 858 | # | 
          
            | 857 | 859 | if [ MATCH ^(AMD64) : [ os.environ PROCESSOR_ARCHITECTURE ] ] | 
        
        
          
            |  | 860 | || [ MATCH ^(AMD64) : [ os.environ PROCESSOR_ARCHITEW6432 ] ] | 
        
        
          
            | 858 | 861 | { | 
          
            | 859 | 862 | default-global-setup-options-amd64 = amd64 ; | 
          
            | 860 | 863 | } |